Archive for November, 2007

School bans tag

November 30, 2007

I read in the Herald today that a school in the states is banning tag and ‘other chasing games’. The reason: some kids don’t like getting chased!

This is far too PC for my liking. Tag is not always a voluntary game! Kids need to understand this!

First they banned Bull Rush, which was unnecessary. I guess the next step now is to wrap every kid up in cotton wool and have no interaction with anyone all day ‘just in case’…

A further Internet search shows they are not the first school to do so. This one in 2002 because tag ‘creates self esteem issues amongst weaker and slower children’

What next?

Muscle Cramps in Sport

November 27, 2007

One of the first tasks I was given by the coach of a rugby team I was training was to help some of the boys overcome cramps which used to happen to them in the last 15 minutes of a game.

Many people say cramps are caused by a sodium/potassium imbalance in the cells, however I would bet more are caused by dehydration and/or lack of conditioning. Hence these were the issues I successfully addressed the problem with.

If you suffer from cramps during sport then go through this list to exclude what the likely cause is:

  1. Is the exercise you are doing over and above what you are used to (especially intensity and duration)?
  2. Are you adequately hydrated?
  3. Now consider the micronutrient balance?

The last two can be addressed adequately with a sports drink or sports gel plus water. To overcome the first (and most likely cause) make sure your training is periodised correctly (slow increases in intensity and duration), and geared towards your competition.

Curls for the girls… And your life

November 26, 2007

This title caught my eye:’ Big biceps, trim waist mean longer life for men‘.

Many people see little benefit in resistance training, some even think it is only for posers and athletes. Well, now there is another good reason. In a study involving over 4,000 men researchers found the best predictors of longevity (not dying) over the 6 year period was having large arm muscle mass and slim waists. In fact the chance of the man dying decreased as his muscle mass rose (the more the better).

Another interesting find close to my heart: BMI was not a good predictor of anything… Unless you are a underweight person with an increased risk of dying anyway.

Can there ever be a better advert for resistance training than this?

This is not an excuse to just train arms in the gym though. As stated, the overall risk decreased as muscle mass increased. If all you do is train your arms all day then you may have big arms, but you are unlikely to have a slim waist!

Also, there is a large school of thought that the best way to make one body part ‘grow’ is to train the whole body. Said another way, there may be a mechanism in the body which stops you from putting on too much upper body weight if the lower body can not support it.

Translation of above paragraph: Train your legs too.

Long legs and running

November 22, 2007

It always seemed strange to me that people would explain someones ability to run fast or over a long period on their ‘long legs’. Like ‘he’s a good runner cause he’s got long legs’. Especially when I looked at the Olympic Games, where there were not that many tall people doing well in running events.

On further research there seems to be some truth to this wide held belief that people with long legs should be faster – at least in endurance events.

Measuring from knee to ankle, those with longer length ‘shin’ bones are more efficient. It has to do with the ability to cool and supply fuel.

So all else being equal, a tall person should be a better endurance runner. But all things are never equal. Training, recovery, diet and lifestyle have a bit to do with it too… And more importantly, these are areas you can make a difference in.

Too Fat to come to New Zealand

November 21, 2007

too fat?The Telegraph reports today that a lady was denied entry to New Zealand due to her being too fat (her BMI is 42 (morbidly obese)).

If the New Zealand standard of emigrant entry is an “acceptable standard of health”, and the argument is overweight people will be a burden on our health care system, then why are smokers allowed in?

I have also written before about the limitations of the BMI system – especially on an individual basis.

I agree with the concept of allowing only healthy people into the country, however it does raise a number of moral comparisons…

Alcohol and Pregnancy

November 19, 2007

Is binge drinking bad for your unborn baby?

Yes.

But is it any worse than regular heavy drinking?

Probably not. At least recent research in this area suggest not.

The problem this topic faces in the future is the totally unethical nature of designing a study to test the effects of regular vs binge drinking on the health of a baby.

I can just see it:

“Sign up now to test the effects of regular heavy drinking on your baby”

I doubt anyone will be rushing to sign up for this kind of study.

Instead they have to rely on retrospective data, which has problems (such as peoples ability to recall accurately how much they drank and when).

Ice baths

November 15, 2007

ice bathDo ice baths help recovery from exercise?

When I used to do more running than I currently do, there was a practice amongst many of the people I ran with to hose their legs down after long runs. Although it was somewhat uncomfortable, after experiencing the feeling I was a convert. It cleaned your legs (usually covered with mud and sweat), and felt like it freshened you up. The logic told to me was that it was what was done to top racehorses, so why not humans? I never did find out if this was actually true or not.

A few years later at University I was taught about contrast showers/baths, which basically involved going from very cold (usually less than 10 degrees), to comfortably hot a few times. The idea was it helped recovery. Since then it seems to have become widespread. You have probably seen pictures in newspapers of famous sportsmen in these baths after training sessions.

The benefits though, when studies have been done on this topic, have not been clear cut. An interesting one out recently studied the benefits of ice baths post-exercise to aid in muscle soreness.

It suggests there is in fact no ‘soreness’ benefit from taking these types of baths. That is, the people who took these types of baths showed no benefit over those that didn’t.

Of course, much like stretching and muscle soreness, there may be other benefits that the baths give, but if you are going through all this discomfort (I think anyone who has taken a contrast bath or shower can testify to the fact it is not the most comfortable thing in the world) in the hope you will to not be sore in the following days then you may just be wasting your time.

Also, like stretching, I think it is still a useful tool in athletic performance, just that we may not understand the exact mechanism by which it works.

It’s a (not so) small world after all

November 14, 2007

disneyThe ‘(It’s a) Small World ride’ in Disneyland is to close and undergo some refurbishments.

The reason? Apparently too many boats are ‘bottoming out’ and getting stuck on the ground due to the increased weight of the people riding in them.

The ride was built in 1963 on the assumption that a male would weigh about 79kg and a female 61kg.

Ryan Lee makes a good sarcastic point:

“I guess Disney’s solution is to continue to offer chocolate dipped ice cream and French fry stands every 5 feet in the park.”

When the ride re-opens the canal will be a few inches deeper and the boats more buoyant. Disney denies there is any obesity link to the ‘refurbishments’.

Fertility Diet

November 11, 2007

There was some recent good news for those trying to get pregnant: You can boost your chances by what you eat.

The striking thing is that after 8 years following over 17,000 women, the advice the authors of the study give are not groundbreaking when compared to commonplace nutritional advice. But this is a good thing. Imagine if they found it was good to drink alcohol, animal fat, and refined sugars if you were trying to get pregnant?

Their advice:

  • higher consumption of mono-unsaturated fat than trans
  • vegetable protein rather than animal protein
  • low GI carbohydrate
  • moderate consumption of high fat dairy
  • iron from plants and supplements
  • multi-vitamin

The multi-vitamin one is one close to my heart. I suspect this is valuable because other aspects of the subjects diet are deficient. Still, they did not find this, and it seems multi-vitamins still act as a safety net in case your vitamin and mineral intake is no good.

Out of interest, olive oil, avocados and canola oil are high in mono-unsaturated fat.

Beer post workout drink

November 9, 2007

Is beer a better workout drink than water? This is the question some Spanish researchers set out to find the answer to. They only used 25 people, but there findings were quite interesting…

Read about the study here.

I remember being told of an old Crusaders motto regarding post game nutrition: “no beer till your pissing clear”. The concept is a good thing. “No water till you pissing clear” does not quite have the same ring to it though…


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