Saturday, August 30, 2014

The Science of Positive Thinking: How Positive Thoughts Build Your Skills, Boost Your Health!

Positive thinking sounds useful on the surface. (Most of us would prefer to be positive rather than negative.) But "positive thinking" is also a soft and fluffy term that is easy to dismiss. In the real world, it rarely carries the same weight as words like "work ethic" or "persistence."

But those views may be changing.

Research is beginning to reveal that positive thinking is about much more than just being happy or displaying an upbeat attitude. Positive thoughts can actually create real value in your life and help you build skills that last much longer than a smile.

The impact of positive thinking on your work, your health, and your life is being studied by people who are much smarter than me. One of these people is Barbara Fredrickson.

Fredrickson is a positive psychology researcher at the University of North Carolina, and she published a landmark paper that provides surprising insights about positive thinking and its impact on your skills. Her work is among the most referenced and cited in her field, and it is surprisingly useful in everyday life.


What Negative Thoughts Do to Your Brain!


Let's say that you're walking through the forest and suddenly a tiger steps onto the path ahead of you. When this happens, your brain registers a negative emotion -- in this case, fear.

Researchers have long known that negative emotions program your brain to do a specific action. When that tiger crosses your path, for example, you run. The rest of the world doesn't matter. You are focused entirely on the tiger, the fear it creates, and how you can get away from it.

In other words, negative emotions narrow your mind and focus your thoughts. At that same moment, you might have the option to climb a tree, pick up a leaf, or grab a stick -- but your brain ignores all of those options because they seem irrelevant when a tiger is standing in front of you.

This is a useful instinct if you're trying to save life and limb, but in our modern society we don't have to worry about stumbling across tigers in the wilderness. The problem is that your brain is still programmed to respond to negative emotions in the same way -- by shutting off the outside world and limiting the options you see around you.

For example, when you're in a fight with someone, your anger and emotion might consume you to the point where you can't think about anything else. Or, when you are stressed out about everything you have to get done today, you may find it hard to actual start anything because you're paralyzed by how long your to-do list has become. Or, if you feel bad about not exercising or not eating healthy, all you think about is how little willpower you have, how you're lazy, and how you don't have any motivation.

In each case, your brain closes off from the outside world and focuses on the negative emotions of fear, anger, and stress -- just like it did with the tiger. Negative emotions prevent your brain from seeing the other options and choices that surround you. It's your survival instinct.

Now, let's compare this to what positive emotions do to your brain. This is where Barbara Fredrickson returns to the story.


What Positive Thoughts Do to Your Brain


Fredrickson tested the impact of positive emotions on the brain by setting up a little experiment. During this experiment, she divided her research subjects into five groups and showed each group different film clips.

The first two groups were shown clips that created positive emotions. Group 1 saw images that created feelings of joy. Group 2 saw images that created feelings of contentment.

Group 3 was the control group. They saw images that were neutral and produced no significant emotion.

The last two groups were shown clips that created negative emotions. Group 4 saw images that created feelings of fear. Group 5 saw images that created feelings of anger.

Afterward, each participant was asked to imagine themselves in a situation where similar feelings would arise and to write down what they would do. Each participant was handed a piece of paper with 20 blank lines that started with the phrase, "I would like to..."

Participants who saw images of fear and anger wrote down the fewest responses. Meanwhile, the participants who saw images of joy and contentment, wrote down a significantly higher number of actions that they would take, even when compared to the neutral group.

In other words, when you are experiencing positive emotions like joy, contentment, and love, you will see more possibilities in your life. These findings were among the first that suggested positive emotions broaden your sense of possibility and open your mind up to more options.

But that was just the beginning. The really interesting impact of positive thinking happens later...

How Positive Thinking Builds Your Skill Set

The benefits of positive emotions don't stop after a few minutes of good feelings subside. In fact, the biggest benefit that positive emotions provide is an enhanced ability to build skills and develop resources for use later in life.


Let's consider a real-world example.


A child who runs around outside, swinging on branches and playing with friends, develops the ability to move athletically (physical skills), the ability to play with others and communicate with a team (social skills), and the ability to explore and examine the world around them (creative skills). In this way, the positive emotions of play and joy prompt the child to build skills that are useful and valuable in everyday life.

These skills last much longer than the emotions that initiated them. Years later, that foundation of athletic movement might develop into a scholarship as a college athlete or the communication skills may blossom into a job offer as a business manager. The happiness that promoted the exploration and creation of new skills has long since ended, but the skills themselves live on.

Fredrickson refers to this as the "broaden and build" theory because positive emotions broaden your sense of possibilities and open your mind, which in turn allows you to build new skills and resources that can provide value in other areas of your life.

As we discussed earlier, negative emotions do the opposite. Why? Because building skills for future use is irrelevant when there is immediate threat or danger (like the tiger on the path).

All of this research begs the most important question of all: If positive thinking is so useful for developing valuable skills and appreciating the big picture of life, how do you actually get yourself to be positive?

How to Increase Positive Thinking in Your Life

What you can do to increase positive emotions and take advantage of the "broaden and build" theory in your life?

Well, anything that sparks feelings of joy, contentment, and love will do the trick. You probably know what things work well for you. Maybe it's playing the guitar. Maybe it's spending time with a certain person. Maybe it's carving tiny wooden lawn gnomes.


That said, here are three ideas for you to consider...



  1. Meditation -- Recent research by Fredrickson and her colleagues has revealed that people who meditate daily display more positive emotions that those who do not. As expected, people who meditated also built valuable long-term skills. For example, three months after the experiment was over, the people who meditated daily continued to display increased mindfulness, purpose in life, social support, and decreased illness symptoms.
  2. Writing -- This study, published in the Journal of Research in Personality, examined a group of 90 undergraduate students who were split into two groups. The first group wrote about an intensely positive experience each day for three consecutive days. The second group wrote about a control topic.
  3. Three months later, the students who wrote about positive experiences had better mood levels, fewer visits to the health center, and experienced fewer illnesses. (This blew me away. Better health after just three days of writing about positive things!)
  4. Play -- Schedule time to play into your life. We schedule meetings, conference calls, weekly events, and other responsibilities into our daily calendars... why not schedule time to play?

When was the last time you blocked out an hour on your calendar just to explore and experiment? When was the last time you intentionally carved out time to have fun? You can't tell me that being happy is less important than your Wednesday meeting, and yet, we act like it is because we never give it a time and space to live on our calendars.

Give yourself permission to smile and enjoy the benefits of positive emotion. Schedule time for play and adventure so that you can experience contentment and joy, and explore and build new skills.

Happiness vs. Success (Which Comes First?)

There's no doubt that happiness is the result of achievement. Winning a championship, landing a better job, finding someone you love -- these things will bring joy and contentment to your life. But so often, we wrongly assume that this means happiness always follows success.

How often have you thought, "If I just get ___, then I'll be set."

Or, "Once I achieve ___, I'll be satisfied."


I know I'm guilty of putting off happiness until I achieve some arbitrary goal. But as Fredrickson's "broaden and build" theory proves, happiness is essential to building the skills that allow for success.

In other words, happiness is both the precursor to success and the result of it.

In fact, researchers have often noticed a compounding effect or an "upward spiral" that occurs with happy people. They are happy, so they develop new skills, those skills lead to new success, which results in more happiness, and the process repeats itself.


Where to Go From Here


Positive thinking isn't just a soft and fluffy feel-good term. Yes, it's great to simply "be happy," but those moments of happiness are also critical for opening your mind to explore and build the skills that become so valuable in other areas of your life.

Finding ways to build happiness and positive emotions into your life -- whether it is through meditation, writing, playing a pickup basketball game, or anything else -- provides more than just a momentary decrease in stress and a few smiles.

Periods of positive emotion and unhindered exploration are when you see the possibilities for how your past experiences fit into your future life, when you begin to develop skills that blossom into useful talents later on, and when you spark the urge for further exploration and adventure.

To put it simply: Seek joy, play often, and pursue adventure. Your brain will do the rest.
<Source: HUFFPOST HEALTHY LIVING>

Mark Harris, PhD
Exercise Physiologist/Nutritionist

Friday, August 29, 2014

Training Through Injuries – The Dos And Don'ts

So many times people do their best to ignore those nagging aches and pains our bodies have simply because they do NOT want to stop training. Those pains you feel are often a warning signal for us to back off, yet many of us continue to TRAIN! 

Let's Get Real!


If you tell me your shoulder hurts so bad you cannot lift it and you just hurt it yesterday, You should have enough common sense to just GO HOME. I understand you are game and ready to go, but we need to think beyond today. We are not professional athletes and tomorrow is not the Olympics. When you are injured, your priority is dealing with your injury, or at the very least, not worsening it. If you are questioning whether or not you should be at the gym – go home.


Focus On Recovery 


Use your time at home to work your recovery. Recovery does not mean sitting still. It could mean using a foam roller and a lacrosse ball to work out muscle spasms or adhesions. It could mean icing for ten minutes at the top of every hour. It could mean visiting your chiropractor, massage therapist or personal trainer. It could mean visiting your doctor and having diagnostic tests run. It does mean, without a doubt, listening to your body and being nice to it.


Be Reasonable


If you choose to stay at the gym and work around your injury, then really work around it and make sure your trainer is aware of the situation. Do not do things that only “hurt a little.” If it hurts, stop doing it. If you are hurting it, you are not healing it. Yes, it might feel better once you get going into the workout, but that has more to do with endorphins and adrenalin than it does with whether or not you are causing damage and preventing healing. This does not mean you cannot move around at all, but do not do things that cause pain.


Don’t Create Other Injuries


If you are dealing with an injury requiring a long healing period, a shoulder injury for example, be careful you do not cause other injuries or imbalances in your training. If your left shoulder is hurt and you spend three months only working your right arm and right shoulder, you are setting yourself up for future problems. It is not just your arms, but your back, hips, and legs that will be affected by this constant unbalanced unilateral movement. In this scenario, you are better of focusing on lower body and core exercises. Engage your coach in helping you choose appropriate exercises.


There Is No Quick Fix


As with most things in life, we are in a hurry to get to the next step and injury recovery is no different. Beware of the quick fix. I have had clients come to me saying their doctor wanted to give them a cortisone shot. Unless you are playing the Super Bowl tomorrow, there is no reason for you to get a cortisone shot. In my experience it only allows you to train through the pain and worsen the injury. Likewise, beware of painkillers in general. If you want to take something, double or triple your fish oil and deal with the inflammation aspect of your injury. Pain is not a voice we should carelessly stifle.


If It Hurts, Stop. It’s Just Not Worth It. 


This one is worth repeating. For the vast majority of us, we work out for fun or because we are committed to a certain level of health. We are not professional athletes, nor for the most part even competitive amateur athletes. Our priorities in our lives are different from a pro-athlete and therefore our priorities in the gym should be also.

Your mission in the gym is to get stronger, fitter, and healthier for the long haul. As a coach, I want to see you getting out of bed on your own at the age of 80. Training through pain and skipping recovery will not get you to that place. You can do it in the short-term, but it will come back to haunt you in the form of continued injuries, arthritis, chronic pain and more.

Think about the people in the gym who have the best form and put up the best numbers. They are the people who put in the work day in and day out, not the people who try to muscle through things. Treat your injury recovery the same way. Take the time necessary to heal properly; it will serve you in both your performance and your quality of life for years to come.




Mark Harris, PhD
Exercise Physiologist/Nutritionist

The 3 Cycles of Periodization Training

Periodization is the process of dividing an annual training plan into specific time blocks, where each block has a particular goal and provides your body with different types of stress.
This allows you to create some hard training periods and some easier periods to facilitate recovery. Periodization also helps you develop different energy systems during various phases of training (e.g., aerobic, anaerobic). Most significantly, periodization is the best way to promote the training effect, which consists of changes in your cardiopulmonary and musculoskeletal systems that result in greater speed and endurance in all aspects of competition and training. To develop an effective training program, it is important to understand the foundation of periodization. This foundation consists of three cycles: macrocycles, mesocycles and micro cycles.



The Macrocycle


The macrocycle is the longest of the three cycles and includes all four stages of a periodized training program (e.g., endurance, intensity, competition and recovery). Because macrocycles incorporate all 52 weeks of your annual plan, they provide you with a bird's-eye view of your training regimen and allow you to facilitate long-range planning.

For example, if you want to peak for a national championship event one year from now, you can mark that date on your calendar and work backwards to create a program that allows you to peak at that time. You can use the same process to identify several major events throughout the year and develop a plan that facilitates multiple fitness peaks. Remember, because of its length, you will always make changes to your macrocycle throughout the year.

The Mesocycle


The mesocycle represents a specific block of training that is designed to accomplish a particular goal. For instance, during the endurance phase, you might develop a mesocycle designed to enhance your aerobic endurance (the ability to use oxygen to produce energy for the muscles over an extended period of time). This mesocycle might consist of three weeks of increasingly long rides, and one week of recovery.
Similarly, you could develop a mesocycle for the intensity phase that is designed to improve your functional threshold power (the highest average power, measured in watts that you can sustain for one hour). This mesocycle might include three weeks of lactate threshold intervals followed by a week of recovery.

During the competition phase, you could develop a mesocycle that improves your neuromuscular power, which is the ability to pedal a very big gear, at a very high cadence for a short period of time (i.e., sprinting). This mesocycle might include four long sprint interval workouts and four short sprint interval workouts over a three week period.
You can even develop a mesocycle for the recovery stage of training. Of course, the primary goal of this mesocycle will be to rest and recuperate, but it will also include a series of easy rides designed to enhance the recovery process.
Mesocycles are typically three or four weeks in length. Two very common mesocycles consist of 21 and 28-day training blocks. For example, a 25-year old experienced competitor might use a 23/5 training pattern (i.e., a 28-day mesocycle). This consists of 23 days of relatively hard work followed by 5 days of recovery and easy spinning. Conversely, an older or less-experienced cyclist may opt for a 16/5 training pattern (i.e., a 21-day mesocycle) that includes 16 days of hard training followed by 5 days of recovery.
If you are unsure about which option to choose, I suggest you begin with a 21-day mesocycle and shift to the longer option when you are ready for a harder challenge. Conversely, if you are currently using a 28-day mesocycle and are dealing with recurring fatigue, use the shorter mesocycle, which provides you with more time to recover.


The Microcyle


A microcycle is the shortest training cycle, typically lasting a week with the goal of facilitating a focused block of training. An example of this is an endurance block where a cyclist strings three or four long rides together within one week to progressively overload training volume.
Another example incorporates block training, which consists of very hard workouts for two or three consecutive days followed by an equal amount of recovery (days off or very easy rides). This would constitute an intensity microcycle where the goal is to improve key physiological abilities such as lactate threshold (the highest intensity a fit cyclist can maintain for 60 minutes) and aerobic capacity (the maximum amount of oxygen the body can consume during high intensity exercise). Generally speaking, three or four microcycles are tied together to form a mesocycle.



For more on Periodization training contact us today and book your time for a personal assessment, 713-870-6960.

Mark Harris, PhD
Exercise Physiologist/Nutritionist

Thursday, August 28, 2014

Adrenal Fatigue!

Adrenal fatigue is a surprisingly common affliction, with some experts stating that 80 percent of the Western world can expect to be affected at some point in their lives. Whether they recover from it's effects is highly dependent on their general constitution, the amount of chronic stress that they inflict upon themselves and the level at which they nourish their body. Many people drift through life in a tired haze, unaware that it's not normal or healthy to feel so abnormal and unhealthy.

Ignoring the symptoms is the number one reason people do not recover from adrenal fatigue. Accepting the low spells during the afternoon, the night after night of restless sleep and the diet-resistant accumulation of abdominal fat seems so illogical, yet why do so many of us do it? Is it because the doctor runs a brief thyroid test and tells us we're OK? Or because we're just too exhausted to do anything about it?

Whatever the reason and whatever your doctor thinks, adrenal fatigue is highly prevalent. It is also treatable. However, without any 'standard of care' attached to the adrenal fatigue label, a world of conflicting suggestions and unsuitable advice fills this void. Countless individuals fall into this trap and convince themselves that they are saddled with this state forever, when the opposite is true.

Your approach to supplementation makes a huge difference to the healing that occurs at the adrenals. The 'shotgun' approach, where a veritable cocktail of adaptogenic herbs. adrenal extracts, and high-dose vitamins and minerals are chucked down the throat is likely to end up causing unexpected reactions. Imposing a solution without considering what the body requires does not help the adrenals. Equally, relying on food alone in the hope that the body will heal itself represents an equally naïve strategy; expecting a weak body with impaired digestion to find sufficient nourishment from devitalised food grown thousands of miles away is overly hopeful, to say the least. In any case, the adrenal gland's requirements for nutritional support are increased at this time. Thoughtful, but not random, supplementation of vitamin C, B5, licorice root, adrenal extracts and an array of minerals is a prerequisite to successful recovery.

Providing the right ingredients is not enough, though. Taking away the triggers is just as important. You may be able to convince yourself that your light nights in front of the laptop make the following day easier to manage, but your adrenal glands think otherwise. The alcohol that you tell yourself 'helps you unwind' is still ruining your sleep. If your relationship with a significant other consists mainly of gritting your teeth and fulfilling your duty, then you really don't need someone else to point out that this relationship is doing you no good. If you have adrenal fatigue and you are training for a marathon, stop.

Most of these problems are factors that most of us are already aware of, but may still ignore. Those who choose their short-term wants over their long-term needs have plenty of time to consider the wisdom of their approach. However, a major obstacle in the way of recovery is rarely considered.

Chronic infection alters the function of the immune system. Not only does this directly tire the individual concerned, the secondary effects are that the adrenal glands get hit hard. Immune cells communicate with one another through the release of localised hormones called cytokines; the only problem is that these cytokines increase the pituitary gland's signal to the adrenal glands, and directly challenge the glands themselves. This all adds up to a heavy workload for the adrenal glands, who were already struggling to keep pace with menial day-to-day demands. The irony is that adrenal fatigue makes fungal infections much more likely, as discussed here. The bottom line is that, regardless of how well you remove psychological stressors and nourish your body, if your adrenals are being hammered all day from the effects of a chronic infection you are unlikely to get anywhere.

Everyone's requirements are different, as is the protocol required for efficient recovery from adrenal fatigue. Stressing the importance of appropriate supplementation and the changing of bad habits stands about amongst the best advice for adrenal fatigue sufferers. However, simply ignoring it and hoping for the best is still the worst choice possible.

The Adrenal Fatigue Cocktail:


What is important is that this mixture should be taken at least once or twice/day, and please be sure that it is taken away from food to have the optimal benefit.

  1. 4 Oz. of Orange Juice – fresh squeezed is best, but not essential (the Vit-C makes sure that the minerals noted below get to the Liver to then nourish the Adrenals)
  2. 1/4 tsp of Cream of Tartar (this is an excellent source of Potassium)
  3. 1/4 tsp of fresh ground Himalayan Sea Salt (this is an excellent source of Sodium & other minerals).

Mark Harris, PhD
Exercise Physiologist/Nutritionist

Tuesday, August 26, 2014

10 Benefits of the Avocado


10 Benefits of the Avocado

Would you believe that the avocado is considered by many nutritional experts to be a perfect food? It's considered a superfood by many.

Surprise, it's not really a vegetable, it's a fruit. In areas south of the border, it's often called the alligator pear because of its shape and dark green roughly textured skin.

Though avocados are heavy in calories, those are nutrient dense calories. And the fats are heart healthy monounsaturated fats and omega-3. Besides actually being healthy, there are many ways to enjoy avocado, from a few guacamole recipes to mixing into salads and to using it as a meat substitute for sandwiches.

(1) Healthy brain: Dr. Daniel G. Amen, author of Change Your Brain, Change Your Life considers avocados as one of the top brain-healthy foods that can help prevent Alzheimer's Disease. The folate in avocado contributes to preventing the formation of brain tangles that are considered a factor for Alzheimer's.

Avocados combine brain healthy omega-3 fatty acids with natural vitamin E, which has been clinically proven to prevent Alzheimer's disease from progressing and even reversing it in its earliest stages.

(2) Healthy heart: Avocados are rich in monounsaturated fats that boost heart health and help lower blood pressure. Avocado monounsaturated fats contain the phytonutrient beta-sitosterol, which was clinically proven to lower LDL and triglyceride blood levels while raising HDL.

Avocados' vitamin B6 and the natural folic acid from their high amount of folate help regulate homocysteine, which if high is a harbinger of bad heart health. The natural vitamin E and the master antioxidant glutathione in a base of avocado's monounsaturated fat's oleic acid are also recognized heart health boosters.

(3) Pregnancy: Folic acid is commonly recommended for pregnant women to help the fetus develop its brain and other vital organs. But some health experts consider synthetically extracted folic acid a problem. They recommend using natural folate for its folic acid content instead.

Folate also reduces stroke risk, according to a study of people who eat folate rich foods.

(4) Eye health: Avocado contains the carotenoid leutein, an antioxidant that specializes with protecting the eyes from oxidative stress damage leading to poor vision, cataracts, and macular degeneration.

(5) Blood pressure: The combination of avocado's high potassium content, 30 percent more than banana, with omega-3 and oleic acid are beneficial toward reducing blood pressure.

(6) Blood sugar: Avocado's monounsaturated fats can prevent or reverse insulin resistance, a source of type 2 diabetes. The high soluble fiber of avocado helps prevent blood sugar spikes.

(7) Anti-inflammatory: Inflammation is considered the basis of most non-contagious diseases. Avocados have an abundance of plant phytonutrient polyphenols and flavonoids, which have been discovered as anti-inflammatory agents.

(8) Anti-aging: The master antioxidant glutathione supports the liver and the nervous system. It is responsible for replenishing and recycling other antioxidants in the body. It is vital for a strong immune system, and avocado is one of the few foods that contain a considerable amount of glutathione.

(9) Digestion: Nutrients and enzymes in avocado reduce inflammation in the stomach and small intestine's mucous lining. This also improves the body's ability to absorb carotenoids and nutrients.

A study's participants who ate salads with avocados absorbed five times the amount of carotenoids than those who did not include avocados. Carotenoids include beta carotene and lycopene. Beta carotene is a precursor to vitamin A, and lycopene is a compound that reduces stroke and prostate cancer risks.

(10) Cancer: Avocados can help protect against prostate and breast cancers.


Mark Harris, PhD
Exercise Physiologist/Nutritionist

The 7 Surprising Benefits of Vitamin D


The 7 Surprising Benefits of Vitamin D

1. Sunshine Vitamin; 

While you’re catching some rays this summer, think about vitamin D. Sometimes called the “sunshine vitamin” because it’s produced in your skin in response to sunlight. Vitamin D is a fat-soluble vitamin in a family of compounds that includes vitamins D1, D2, and D3. It can affect as many as 2,000 genes in the body.


2. Stronger Bones;

Vitamin D has several important functions. Perhaps the most vital are regulating the absorption of calcium and phosphorous, and facilitating normal immune system function. Getting a sufficient amount of the vitamin is important for normal growth and development of bones and teeth, as well as improved resistance against certain diseases.

If your body doesn’t get enough vitamin D, you’re at risk of developing bone abnormalities such as osteomalacia (soft bones) or osteoporosis (fragile bones).


3. D Fights Disease

In addition to its primary benefits, research suggests that vitamin D may also play a role in:
  • Reducing your risk of multiple sclerosis, according to a 2006 study published: (Journal of the American Medical Association)
  • Decreasing your chance of developing heart disease, according to 2008 findings published in; (Circulation)
  • Helping to reduce your likelihood of developing the flu, according to 2010 research published; (American Journal of Clinical Nutrition)


4. Vitamin D Sources; 

Your body produces vitamin D naturally through direct exposure to sunlight. A little can go a long way: just 10 minutes a day of mid-day sun exposure is plenty, especially if you’re fair-skinned.

Besides getting vitamin D through sunlight, you can also get it through certain foods and supplements. The National Institutes of Health (NIH) recommends that you obtain vitamin D from all three of these sources in order to ensure adequate levels of vitamin D in your blood.


5. Beware of Vitamin D deficiency.

Many lifestyle and environmental factors can affect your ability to get sufficient amounts of this vitamin through the sun alone. These factors include:
  • Pollution
  • Use of sunscreen
  • Spending more time indoors
  • Working longer hours in offices
  • Living in big cities where buildings block sunlight

These factors contribute to vitamin D deficiency in an increasing number of people. That’s why it’s important to get some of your vitamin D from sources besides sunlight.


6. Although few foods contain vitamin D naturally. Foods that contain vitamin D include:

  • Salmon
  • Sardines
  • Egg yolk
  • Shrimp
There are other foods that are fortified with vitamin D however the quality of the vitamin may be poor. That's why its best to eat foods that have naturally occurring Vit D. 


7. How Much Do You Need?

There has been some controversy over the amount of vitamin D needed for healthy functioning. Recent research indicates that we need more vitamin D than was once thought.

The Institute of Food and Agricultural Sciences (IFAS) reports new intake recommendations (based on international units—IUs—per day):

  • Children and teens: 600 IU
  • Adults up to age 70: 600 IU
  • Adults over age 70: 800 IU
  • Pregnant or breastfeeding women: 600 IU
Some sources suggest that considerably higher daily amounts of vitamin D—as high as 2000 IU per day—are needed. The NIH emphasizes that people over age 50 generally need higher amounts of vitamin D than younger people do.

Although the exact amount may be in question, the importance of vitamin D is not. Talk to your doctor for guidance on how to ensure you get the right amount for your needs.


Mark Harris, PhD
Exercise Physiologist/Nutritionist