Archive for the ‘Fitness’ Category


Don’t exercise to lose wieght

One of the most inspiring stories to come out of the Commonwealth games was the amazing comeback of Australian swimmer Geoff Huegill.  For those non-Australians who don’t know the story, Geoff’ retired from competitive swimming in 2004 after the Athens Olympics.   Like many competitive athletes who retire, he stopped training and became a party animal.
Needless to say, his fitness plummeted and he put on weight.  45 kilograms of fat to be precise.
Geoff’s life and health spiralled out of control as his weight ballooned to 138 kilograms.
Fortunately in 2007 he realised he was on a path to self-destruction and decided to do something about it.  He obviously changed his diet but importantly he got active again.
In fact, not only did he start exercising again, he decided to get fit.
And that’s the lesson in Geoff’s amazing story for all of us.
If Geoff had set himself the goal to lose weight he would probably have cut his calories drastically low in an attempt to lose weight fast.  This is what most diets and fast weight loss programs suggest. And it would have worked initially.
He would have lost weight but he wouldn’t have got any fitter and his metabolism would have slowed down.  Not what a fit athlete or a person trying to maintain their weight loss needs.
(I read about a diet in the paper this morning that promised I’d lose 5kg in 7 days or I’d get my money back!)
Most weight loss programs and diets tell people to exercise at a low intensity as this burns more fat.  The reality is, the fitter you are, the more effective and efficient your body is at burning fat.  Not only that, the other metabolic changes that come with being fit help protect you from many of the conditions that accompany obesity.  Just losing some fat doesn’t necessarily make you healthier; it’s the changes that happen in the cells and tissues that improve your health.
By focusing on getting fit, Geoff lost weight and turned his body into an efficient fat-burning engine.  He could do more, felt better and felt better about himself.
I doubt he would have achieved all that if he had just tried to lose weight.  But because he set out to get fit, he not only lost weight, he got the added benefits I mentioned above.
What’s the lesson again?
If you want to lose weight, don’t exercise to lose the weight.
Do an exercise program to get you fitter.  Monitor if your fitness is improving rather than what the scales are saying.  It may take a bit longer to see any changes in your weight (you’ll probably put on some muscle) but in the long term you will be healthier, happier and better able to burn fat.

Note – Numerous studies have shown that it is better to be fit and carry a few extra kilos than unfit and normal weight.

Focus on fitness, not fatness.


Body Fat Percentage is The Right Way to Measure Fitness – Rubbish!

I’ve just read an article on a website for women and girls with the above title and it worries me – a lot.

The idea that body fat is THE measure of fitness is some of the reason why there is an obesity epidemic in the Western world.

The article discusses how the American Army has set certain percentage body fat levels as the measure of fitness that everyone must comply with or get kicked out of the Army.  In some ways this is not a bad thing.  Especially if it helps prevent the gradual increase in body fat that happens to most people as the years go by.

But… the thought that body fat is used as the measure of fitness is just wrong. There are a lot of people in the world who have low body fat levels and aren’t fit.  Take a lot of the stick-thin models on the catwalks who starve themselves to stay ‘skinny’ and never do any strength training for fear they will get “too” big.  They might be thin and look good in certain clothes but they aren’t fit and many aren’t healthy.

On the other extreme there are a lot of people who exercise regularly and are quite fit but carry extra body fat.  Under the US Army system, these people would get kicked out while the thin person who never does any exercise would  not.

Ideally the slightly overweight fit person would drop some body fat  and as a result be even fitter, but all the research tells us that it healthier to be fit and fat than unfit and thin.

The idea that we use body fat as a measure of fitness just perpetuates the diet mentality, and does nothing to help correct the underlying health issues that accompany having too much body fat.  The way to fix those is to get fit, just losing a few kilos of fat isn’t going to help in the long term.

I think the US Army should focus on how fit people are.  That might include body fat levels but to use just body fat as a measure of fitness is flawed and sends the wrong message.

For the rest of us, we should focus on fitness not fatness.  If you get fit, body fat will take care of itself.


Do you feel in control of your life?

Many studies have looked at the risk factors for health, but what about the factors that help promote good health?  We hear constantly about all the things we shouldn’t do but perhaps if we were told what had a positive effect we could focus on that.

Research by Margie E. Lachman Ph.D. and Stefan Agrigoroaei Ph.D. of the Brandeis Psychology Department has examined the psychological factors that lead to better heath.

The Midlife in the U.S. (MIDUS) study, involved 3,626 adults aged 32 to 84 who were assessed over two periods about 10 years apart. What the researchers found was that with proper protective elements in place, declines in health could be delayed by up to a decade. according to the findings, specific psychological, social, and physical protective factors are associated with better health in later life.

The research identified physical exercise, social support and control beliefs as significant predictors of change in functional health.  This was above and beyond the negative effects of the traditional risk factors.

“Control beliefs” refer to a person’s sense of how much they can influence important life outcomes. Those who have a greater sense of control are more likely to engage in health-promoting behaviors, such as getting exercise and eating right. Suppotive social relationships can promote health by reducing stress and encouraging healthy behaviors.

One of the reasons exercise is such a potent influence on health, is that not only does it improve our mental and physical capacity, but it helps us feel in control.

And the more in control we feel, the less our health declines.  It’s a double-whammy in the right direction.


Need some added motivation to exercise?

I’ve said many times that regular exercise is more of a mental challenge than a physical challenge, so anything that helps you stay motivated to get and stay fit is worth thinking about.

So this blog is for those of you who need that extra motivation to start or maintain some regular strength training. Unless you’re a new subscriber to this blog you’ll know I encourage everyone to do some strength exercises at least twice a week.

Here’s some exercises that will help you in everyday life as well as the bedroom.

Pushups

If you’re going to pick just one exercise to do, this is the one to go for. (No surprise really) If you can’t do regular pushups at first, start with wall presses (essentially pushups done against the wall), aiming for 3 sets of 12-15 repetitions. Once you can do that many relatively comfortably, progress to knee pushups on the floor, making sure to keep your back straight while you slowly touch your nose to the ground. Once you’re can do those easily, progress to traditional hand-and-toe pushups.

Abdominals

After pushups, your abs are the next most critical love-boosting body area. After all, you have to use your abdominal muscles while making love.

The key to strong abs is to use a variety of exercises to work the different abdominal muscles. Start your with good old-fashioned crunches. Lie on your back, hands supporting your neck, knees bent and your feet on the floor, then bring your body up just enough to get your shoulders off the ground. Do 3-5 sets of 15-20 repetitions.

Bridges or hip raises are also good. Lie on your back with your knees bent and lift your hips up and down, making sure to lower your hips slowly. Aim for 3 sets of 15 reps.

Men can also try pelvic tilts. Standing up or lying down, straighten your lower back and pull your belly button in until your lower back touches the wall or floor.

Women contract your pelvic muscles (the ones you’d use to stop the flow of urine); squeeze the muscles tight for 3 seconds, then relax for 3 seconds. Do 10-15 repetitions, three times a day. The good thing about these two exercises is you can do them any time of the day, without people even noticing.

Deadlifts

These keep your back strong. To do deadlifts, you raise a weighted barbell or dumbbells from the ground to about thigh level, starting in a bent-over position, Imagine picking up a bucket of water and putting it on a step in front of you. It is important to keep your back in its natural position by not letting it curve forward too much.

An alternative to deadlifts if you haven’t got any weights (or a bucket) is Superman exercises. Lie on your stomach with your hands out in front. Imagine you are Superman flying through the air and lift your legs and arms off the floor. Hold for a few seconds then relax. Aim for 3 sets of 15.

Added Bonuses

  1. Exercise may help beat erectile dysfunction, too. One study showed that in men over 50 years of age, physically active men had a 30% lower risk of erectile dysfunction than sedentary men. Studies also show a strong link between obesity and ED.
  2. People who exercise often have a better body image than sedentary people, which can help them feel more appealing. One study found that 80% of men and 60% of females who exercised two to three times a week felt their desirability was above average.
  3. Have a love life like you’re 20 years younger. A study showed swimmers in their 60s have love lives comparable to people in their 40s. Other research found that in men and women over 55, high levels of ‘intimacy’ were associated with higher degrees of fitness than in younger sedentary people.

If you think you got bad genes, get moving.

Too many people blame their parents or grandparents for the fact that they struggle with their weight.  While there is certainly some truth in the fact that genetics plays a part, research has shown that staying active can attenuate the influence of your genes.

A  large population study followed middle-aged adult participants from the European Prospective Investigation of Cancer (EPIC)-Norfolk cohort. In total, 11,936 were followed for between 3 – 7 years and had their BMI assessed. Physical activity was measured using a validated self administered questionnaire.

In this study, the researchers calculated a genetic predisposition to obesity score (by adding up the BMI increasing alleles on the chromosomes).  Researchers used cross sectional and longitudinal analysis to look at the interactions between the genetic predisposition score, physical activity and BMI.

The results from this study showed that each additional BMI-increasing allele was associated with an increase in BMI equivalent to 445g of body weight for a person 1.70m tall, and that the size of this effect was greater in inactive people than active people. Also, each additional obesity susceptibility allele increased the risk of obesity by 1.116-fold, but for physically active people this risk was 40% lower.

This study indicates that people with a “genetic predisposition to obesity” can lower their risk of obesity by 40% if they are physically active.

While physical activity is associated with a lower BMI in the overall population, the study indicates that those with a genetic predisposition to obesity benefit more from increased physical activity than those who are genetically at lower risk.

So if you think you inherited genes that make it easier for you to put on weight, don’t just sit there blaming your parents.  Get moving.


Don’t blame your parents

Genetics determines who can get fat not who will.

Some people are more predisposed to fat gain than others. However you have more control than you think, or maybe than you want to admit.

Studies have shown that multiple areas on a person’s DNA (genetic loci) identified by genome-wide association studies (GWAS) increase the susceptibility to obesity in a cumulative manner. That means the more obesity-related factors on your DNA, the more likely you are to accumulate body fat. However, it wasn’t known whether, and to what extent, this genetic susceptibility may be influenced by a physically active lifestyle.

A recent study in Europe examined over 20000 people over a 3.6-year period showed that living a physically active lifestyle is associated with a 40% reduction in the genetic predisposition to obesity.

In this study, the researchers examined the DNA areas that increase obesity-susceptibility in a sample of 20,430 individuals (aged 39-79 y) from the European Prospective Investigation of Cancer (EPIC)-Norfolk cohort with an average follow-up period of 3.6 y.

A genetic predisposition score was calculated for each individual by adding the body mass index (BMI)-increasing areas. Physical activity was assessed using a self-administered questionnaire. Statistical analysis was used to examine the effects of the genetic predisposition score and its interaction with physical activity on BMI/obesity risk and BMI change over time.

Each additional BMI-increasing area increased the risk of obesity 1.116-fold in the whole population, but significantly more in inactive individuals than in active individuals.

What does this mean?

Some people inherit a predisposition to accumulating body fat than others. Others use genetics as a reason for their excess fat. What this study shows is that even if you are predisposed to getting fatter, if you have an active lifestyle, and exercise regularly and consistently, your chance of getting fat is significantly less.

Add to this the risk-reducing effects of exercise, regardless of body fat, and it makes sense to make exercise a part of your day; every day.

Reference: Li S, Zhao JH, Luan J, Ekelund U, Luben RN, et al. (2010) Physical Activity Attenuates the Genetic Predisposition to Obesity in 20,000 Men and Women from EPIC-Norfolk Prospective Population Study. PLoS Med 7(8): e1000332. doi:10.1371/journal.pmed.1000332


Why lactic acid is not the enemy

Lactic acid gets a hard time.

Fitness professionals and exercisers alike seem to think it is the enemy and should be avoided at all costs.

“Don’t exercise too hard, you’ll get lactic acid in your muscles and they’ll take days to recover.”

“Lactic acid will cause muscle damage and stop you from training.”

Knowing how lactic acid is produced in the body is useful to improving your fitness.

So what is lactic acid and why am I saying it isn’t your enemy?

When you exercise, glucose (sugar, carbohydrate) is broken down into different chemicals, to produce energy in a form the muscles can use. As long as your heart, lungs and blood can get enough oxygen to the working muscles, you break the glucose down completely and end up with useable energy, carbon dioxide and water. This is is called aerobic exercise.

If you exercise at a high intensity and the oxygen supply isn’t sufficient to meet the demands of the contracting muscles, glucose isn’t broken down completely and lactic acid is produced. This is anaerobic exercise.

Increased lactic acid in the muscles decreases the pH and this leads to the burning feeling that makes you slow down or stop. It’s like a built-in safety mechanism. Lactic acid can also move out of the muscles into the blood and this may be why people feel nauseous after an intense effort (e.g 400m race).

Because lactic acid causes us to slow down and results in discomfort or pain, it has been labelled as bad. However, it is when our muscles are working at the point of lactic acid accumulation that they are stimulated to “get fitter” by producing more enzymes, increasing blood vessels, producing more red blood cells etc. Up until the point at which there is sufficient oxygen to meet demand, the muscles are quite comfortable so don’t “need” to get fitter. It is at the point where lactic acid starts to accumulate that the muscles realise they need to be fitter.

How do you know if you are exercising hard enough?

You’ll know you are exercising hard enough, when you start to breath hard. When lactic acid accumulates and the pH in the muscles and blood goes down, the body responds by chemical reactions that neutralise the acidity. A by-product of these chemical reactions is carbon dioxide. It is this build up of carbon dioxide that makes us breath harder and “puff.”

So what does this mean?

Firstly, it means that lactic acid isn’t your enemy. In fact, it is your friend. Think of it as your fitness conscience that tells your muscles to get into better shape. And the better shape they are in, the higher intensity exercise you can do before you reach the point of lactic acid accumulation, meaning you are fitter.

Secondly, it means if you want to get fitter you need to train in a way that pushes you to the point of lactic acid accumulation. Now because you can’t maintain this level of exercise for very long, you have to do short bursts of exercise. This is why interval training works so much better to improve fitness. You push hard for a minute or two and accumulate lactic acid in the working muscles and blood, then slow down to let the muscles use up some of the lactic acid.

Thirdly, when you push yourself and start to breath faster, it is a good indicator that you are working hard enough. It means your body is producing carbon dioxide to buffer the lactic acid. When this happens, try to exhale strongly to clear the carbon dioxide from your body and speed up the recovery process.

Then…. when you have got your breath back to normal you can do it again!!

Five efforts (intervals)s like this during your workout is sufficient to tell the muscles to get fitter.

The good news is that the fitter you are, the better the body gets at using up the lactic acid and blowing off the carbon dioxide. It’s why athletes recover so quickly after a race and can talk to the TV person.


Seven reasons for exercise before breakfast

With the days starting to get longer (in the southern hemisphere anyway), I thought it would be a good time to revisit the issue of the best time of the day to exercise. I also get questions about whether you should eat breakfast before exercising so I’ll give some information on that as well.

The best time of the day to exercise is the time that is most convenient for you and you are most likely to do. There is no point trying to exercise at a time that just doesn’t suit your routine.

When I was competing in triathlons I used to exercise after work, however once my second son arrived getting out in the afternoon became too hard. (With just one I could take him with me in a running stroller but two didn’t fit.)

I tend to exercise mostly in the morning and I often recommend people give early morning exercise a try.

Here are some reasons morning is the best time to exercise.

1. Many people believe that early morning exercise before breakfast burns more body fat than after eating later in the day.  Although there is still some debate, the evidence is growing that doing aerobic or cardio first thing in the morning on an empty stomach is good for fat loss. The argument is that after an overnight 8-12 hour fast, your body’s stores of glycogen are reduced and you burn more fat when glycogen levels are low.
Eating breakfast causes a release of insulin which interferes with the mobilization of body fat. Less insulin is present in the morning; so more body fat is burned when exercise is done in the morning.
There is less carbohydrate (glucose) in the bloodstream when you wake up after an overnight fast. With less glucose available, you are likely to burn more fat.

2. If you eat breakfast immediately before exercising, you have to burn off what you have just eaten first before tapping into stored body fat (and insulin is elevated after a meal.)

3. When you exercise in the morning, it raises your metabolism from it’s lowest and it stays elevated for a period of time after the workout is over. If you exercise in the evening, you burn calories during the session, but you don’t get the same advantage of the “afterburn” effect because your metabolic rate drops dramatically as soon as you go to sleep.

4. Morning exercise gives you a feeling of accomplishment and makes you more productive the rest of the day.
Morning exercise “energizes” you and “wakes you up” by turning off melatonin (the sleep hormone) and turning on serotonin (the feel good hormone).

5. There is some evidence that morning exercise may help regulate your appetite for the rest of the day. You’re also more likely to make better eating choices if you have already done your exercise for the day.

6. Your body’s circadian rhythm adjusts to morning routine, making it easier to wake up at the same time every day.
You’re less likely to skip your workout when it’s out of the way early. After work there are more demands likely to get in the way, like working back late or you just feel too tired or someone invites you for a drink!

7. You can always “make time” for exercise by setting your alarm a bit earlier in the morning.

Getting into the habit of morning exercise takes a while, and even then some mornings can be a bit of a struggle to get out of bed (especially when it is cold).  For all the reasons above, however, I recommend you give it a try.

For fat loss, fitness, lifestyle and mental health, early morning exercise is a good habit to develop.


Exercise really is good for your brain

A new study, reported in the journal Neuroscience, has shown that regular aerobic exercise improves blood flow to the brain and speeds the learning process.

The study led by researchers from the University of Pittsburgh School of Medicine is the first to examine these relationships in non-human primates.

While there is ample evidence of the beneficial effects of exercise on cognition in other animal models, such as the rat, it has been unclear whether the same holds true for people, said senior author Dr Judy Cameron.

Testing the hypothesis in monkeys provides information that is more comparable to human physiology.

“We found that monkeys who exercised regularly at an intensity that would improve fitness in middle-aged people learned to do tests of cognitive function faster and had greater blood volume in the brain’s motor cortex than their sedentary counterparts,” Dr. Cameron said. “This suggests people who exercise are getting similar benefits.”

To reach the conclusion, researchers trained adult female cynomolgus monkeys to run on a human-sized treadmill at 80 percent of their individual maximal aerobic capacity for one hour each day, five days per week, for five months.

Another group of monkeys remained sedentary, meaning they sat on the immobile treadmill, for a comparable time. Half of the runners went through a three-month sedentary period after the exercise period.

In all groups, half of the monkeys were middle aged (10 to 12 years old) and the others were more mature (15 to 17 years old). Initially, the middle-aged monkeys were in better shape than their older counterparts, but with exercise, all the runners became more fit. (It’s never too late to get fit!!)

During the fifth week of exercise training, standardized cognitive testing was initiated and then performed five days per week until week 24.

“Monkeys that exercised learned to do the cognitive tasks twice as quickly as control animals,” Dr. Cameron said. “They were also more engaged in the tasks and made more attempts to get the rewards, even though they made more mistakes.”

She noted that later in the testing period, learning rate and performance was similar among the groups, which could mean that practice at the task will eventually overshadow the impact of exercise on cognitive function.

When the researchers examined tissue samples from the brain’s motor cortex, they found that mature monkeys that ran had greater vascular volume than middle-aged runners or sedentary animals. However, those blood flow changes reversed in monkeys that were sedentary after exercising for five months.

These findings indicate that aerobic exercise at the recommended levels can have meaningful, beneficial effects on the brain.

It also shows that the benefits of exercise only last while the exercise is continued. After five months the benefits were lost.

So once you get fit, do enough to maintain your fitness.

Fortunately, it takes less exercise to stay fit than it does to get fit.


Who will the alpha generation copy?

This year marks the start of a new generation: the so called “alphas.”

The alphas’ parents will predominantly come from generations X and Y and according to a leading social researcher, this could be the biggest generation to date.

The alphas are expected to have many career opportunities due to the skills shortage and starting their careers  at a time when the ageing population hits its peak and older people are leaving the workforce.

However, the alphas are also going to face the challenge of working out how best to care for the elderly in the long term.  Paying for it may fall on the alphas.

At the same time, new technology increases the risk that the alphas will lead a sedentary lifestyle with the accompanying health issues.  So not only will the health system be struggling with a older demographic, but this younger generation will put additional strain on it due to a sedentary lifestyle.

What can current generations do to give the alphas’ a chance at better health?

The greatest contribution baby boomers, gen X and Gen Y can do is to be positive role models in relation to their own health and fitness.  Each generation learns from the ones ahead of it.  If they see their parents leading healthy lifestyles, they are more likely to do the same.

If they see their parents and grandparents exercising and maintaining their fitness, they are more likely to do the same.  The choices they make are influenced by what they see generations ahead of them doing.

The biggest influence current generations can do, is to be an example of the lifestyle that will lead to better health and fitness; balancing work and family life, eating healthy foods and exercising regularly.

Do you bit and be a role model.

Your children and grandchildren are going to need all the help they can get.


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