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Showing posts with label bmi. Show all posts
Showing posts with label bmi. Show all posts

Sunday, December 2, 2012

Day 225 - What does it mean to be "fit"?


There are more and more arguments raging in the health and fitness industry presently about what a "fit" person really is. Some studies show that overweight, or "big-boned" individuals can still be fit, and that skinny, sedentary people can likewise be not-so-fit. Both of these cases can be true under the right circumstances.

There are also those individuals that try make themselves look or seem "fit" but really aren't at all. You may see that guy down at the local gym, bench-pressing 400 pounds and think to yourself, "Wow, that guy is really fit!" Or what about that female neighbor of yours who you see out running 20 miles a day and competing in multiple triathlons, you may also think, "Holy smokes, that lady is so
fit." Keep in mind, overall fitness is not determined at doing one particular thing perfectly (the bench press) but being able to do a multitude of things really well.

One thing that we
can agree on, however, is the fact that the world has a growing obesity epidemic, and that means there are many, many, many un-fit people out there.

One way many professionals like to test whether a person is "fit" or not is to use the BMI scale. Many of you are probably familiar with this. You can find the equation online, where you punch in your weight and height and it will give you a
very general calculation. You then take that number and look at a scale to determine what "range" you fall in, such as "healthy", "overweight", "obese", etc.

The BMI system has many flaws, one of which is the way it groups all body types into one category. For example, a muscular football player may register a BMI of overweight or obese based on the amount of muscle mass that he possesses. The BMI scale can at least be an effective starting tool for the general public to let individuals gauge where they stand, and their dire need to lose some weight, but also shouldn't be used for everyone.


Another way the BMI scale is inaccurate is for the thin, sedentary people out there. Yes, we all know
those people. They are the ones that, "Can eat whatever they want and never gain a pound!" There are certain individuals out there that have the body type that does not show much body fat, and if they were to test their BMI, they would receive a false sense of being "fit" because their height and weight works well in that calculation. The truth of the matter is that those of us that do not lead a lifestyle of regular exercise and a clean diet still pack on body fat, but can be in different places, such as packed around our internal organs.

Visceral fat, which is the fat that acts as protection and insulation around our internal organs, can be extremely dangerous because it has been shown to increase the likelihood of heart disease, insulin resistance and type-2 diabetes, not to mention certain cancers. Some visceral fat is fine, but too much is problematic, so even though your BMI tells you that you are "fit", don't think for a second that pounding back a Big Mac and "litre of Cola" is good for you! Plus, more and more studies have shown that active, "fat" people have lower mortality rates than sedentary, "skinny" people. This has led to the creation of a new term in the health industry known as "skinny fat".


So, you say, if I can be "un-fit" whether I am skinny or fat, what exactly is fitness? Well, as basic as it can get, your level of fitness is your ability to perform in this world. We all lead different lives, with different goals as aspirations, but for most of us, if we can follow the guidelines listed below that determine our fitness level, we should for the most part be happier, healthier individuals!


1. Body Fat Percentage - This is the percentage of your overall weight that is composed of fat, or "adipose tissue". A number to aim for would be 10-14% for men and 14-18% for women. Anything slightly below that is super-fit, anything above that and you can afford to lose a few pounds. Being too far under also carries additional risks, so unless you are training to be in the Olympics, these numbers are pretty good for everyone!  Excess weight has been shown to play a role in a myriad of issues from hormonal problems, impotence, heart disease, cancer, diabetes, etc. The list goes on. Get your body fat under wraps!


2. Aerobic Performance - This is your body's way of transporting oxygen. It is the ability to perform in physical activity much more efficiently (yardwork, exercise, sex) and recover quicker from those types of activities. If you are out of shape, climbing a set of stairs can make you gasp for air, whereas a fit person could go for a nice easy run for an extended period of time and barely increase their breathing rate. A nice way of seeing how "fit" you are is by testing your resting heart rate first thing in the morning. As soon as you wake up, before you get out of bed, check your pulse and count how many beats you have in 15 seconds then multiply that by 4, that is your resting heart rate. Generally, anything below 70 is good, below 65 is excellent, and if you are in great shape, you may be wondering if you heart is beating at all! *Note, your resting heart rate will be elevated if you are fighting a cold/flu or have a cold/flu on its way*


3. Muscle - I preach this all the time.
Everybody needs to do resistance training, men and women, young and old. Once you hit the age of 30 (approximately) your body starts losing more and more muscle mass every year, unless of course you do something about that! Your body needs a certain amount of muscle to survive (like fat) for things like movement, protection, and heat. Not to mention, the more muscle mass you have, the higher your resting metabolic rate is. That means, that you burn more calories even when you are sitting there reading this blog. Too much muscle can be problematic too though so don't overdo it, not that any of us really have the ability to overdo it without "cheating" (steroids). The more muscle we have, the better we can move things, including ourselves. Resistance training is short bouts of intense effort which stimulates certain hormonal productions in our bodies. These hormonal productions are vital to recycling old tissue and making fresh new tissue, reversing, or at least slowing the process of aging.

4. Stretching - Everybody should do a little bit of stretching every day of their lives. You do not need to be some zen-like yoga master that can fold your body up into a suitcase, but enough stretching to open up your muscles, ligaments and tendons to increase your circulation. Exercise and our daily lives cause muscles to shorten over time so stretching allows us to stay open and less prone to injury.


5. Balance - How many times have we all seen videos on TV or the internet of that silly old uncle falling into the pool, or toppling over the birthday cake because he lost his balance? Our balance deteriorates as we age, so it is vitally important that we practice our balance on a regular basis. Balance is the ability for our brain's internal computer system and mechanisms to control our center of gravity. The less you use it, the quicker it deteriorates. By training your balance you are keeping those neural pathways open so that your body can be more efficient at activating certain muscle groups to keep you from falling over!


6. Agility - This is somewhat related to balance, it is your ability to move your body in quick, sudden directions. If you are an athlete, agility is key to you performing better than your competitors. As you age, agility is key to you avoiding something falling from the ceiling, or a car that has jumped the curb, etc. I know, those are extreme examples, but even small things such as your kids or grandkids falling down is a great motivator to stay agile!


Quote of the day:
"If you don’t make mistakes, you aren’t really trying."
~ Unknown

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Thursday, March 8, 2012

Your Numbers






We live in a society that is completely obsessed with numbers such as; finances, sports, weather, etc. Part of the reason why we, as a society, are so focused on numbers is because of their direct tie to results. Unfortunately, in many cases, people focus too much on certain numbers when it comes to their health and fitness. Below, I have created a list of common numbers related to a healthy lifestyle that I can discuss in further detail so that you can not only learn a thing or two, but also realize that some numbers really aren't all that important to stress over!

Blood Pressure

This is definitely an important number. People with high blood pressure carry higher risks for certain diseases such as heart disease and stroke. The Heart and Stroke Foundation of Canada lists the following guidelines for your systolic and diastolic numbers:

Normal:
Systolic - 120-129
Diastolic - 80-84

High Normal:
Systolic - 130-139
Diastolic - 85-89

High Blood Pressure:
Systolic - 140 and over
Diastolic - 90 and over

The good thing about high blood pressure is that it is (for the most part) entirely possible to lower your numbers with a healthy diet and regular exercise.

Heart Rate

One of the biggest misconceptions out there today is the "fat burning zone". It baffles me to know that even to this day, there are still posters and signs plastered in gyms across the world that indicate heart rate zones that target fat burning.

Here is what is really happening. During your every day life and low-level activity, your body is meeting its energy requirements with (mostly) aerobic energy systems by burning adipose (fat). As your heart rate climbs during an intense exercise session, you begin to transition into burning more sugars (muscle glycogen) but still maintain burning adipose. By aiming to keep your heart rate in a specific 'zone' is just short-changing yourself and your workout will be less efficient than if you were to push yourself. So in short, disregard 'heart rate zone' posters and push yourself to work hard!

The heart rate number you should pay attention to is your resting heart rate. You can take this first thing in the morning before you get out of bed. The fitter you become, the lower your resting heart rate will fall, which is good for you in the long run as it means your heart doesn't have to work as hard over a lifetime.

A "normal" resting heart rate should ideally be between 60-80 beats per minute, although you should discuss with your doctor what is right for you as heart rates will vary between people based on age, genetics, and other health conditions. I have heard that during his peak, Lance Armstrong's resting heart rate was between 32 and 34 beats per minute!!!

Weight

Another number that really does not carry a whole lot of meaning. Actually, let me rephrase that. If you are overweight, chances are, you know it. We should all know by now what a respectable weight range is based on your height. Having said that, you should really try and avoid weighing yourself every day as your body will usually fluctuate between a few pounds based on what you ate during the day,  your hydration level, etc.

Also, if you are just starting a new exercise program, and your muscles are even a little bit sore, your weight may actually go up a bit as water retention in your muscles is part of the repair and remodeling process.

Ideally, you should aim to get your weight into a fairly respectable range, keeping in mind that muscle weighs more than fat (relative to size), and then stay in that ballpark. Do not stress over a few pounds difference here and there from day to day or week to week!

Body Mass Index (BMI)

This can be a reliable scale for the average person to slap them in the back of the head and get their butts moving, but it is not reliable for all. This is a simple equation basing your 'ideal' number on an equation using your weight and height.

As soon as the BMI scale attempts to try and class athletes or bodybuilders - that are even slightly muscular - into a category, is where you run into problems. Remember that muscle weighs more than fat, so as you start to get fit and healthy and pack on some muscle mass,  your BMI is going to cry aloud. Anything over 25 is considered overweight!

Don't kid yourself here, however, don't calculate your number and then try and convince yourself that you are fit when you really aren't!

Body Fat Percentage

I will be the first to admit that I have never tested my own body fat percentage. Why? Because I feel there is no need for such a useless number. I have been a skinny guy (lucky) my whole life, so my body fat probably hasn't changed much over the span of my life. So what's the point? So I can brag to other people? Nah!

Not only that, but majority of body fat tests out there are terribly inaccurate. The only way you could make some of the tests reliable is to test yourself on the same day, after eating the same foods, and drinking the same amount of water, and blah, blah, blah.

There is one advantage to testing your body fat percentage however. If you an individual who needs to lose even a fair bit of weight, this can be a great motivational tool for you to see this number drop. Again, keep in mind that you would need to measure yourself with the same instrument, under as similar circumstance as possible every time, and also remind yourself that there is a possibility of a +/- %5 variation on each test!

Measurements

These numbers can be the most telling. Again, remember that muscle weighs more than fat, so if you are exercising and eating right but your scale hasn't budged, you may still be making progress! I recommend keeping track of your numbers that are relevant to your goals. For example, if you are trying to slim down and lose weight, take measurements of your waistline, hips, legs, and butt before and after many weeks' work to see the change. If, on the other hand, you are looking to put on some muscle, you may want to measure the size of your biceps and chest.

Often times, you may start to notice your clothes are starting to feel looser - or tighter if you are trying to put on some muscle - so you may not even need a tape measure!

Calories

 There is a pretty close link with "calories in, calories out", but it is not an exact science. For the most part, we all need a specific number of calories to maintain, lose, or gain weight, but these numbers fluctuate between people due to genetics, age, metabolisms, activity levels, etc.

You can definitely experience some success by ingesting fewer calories, but the key is making every single one of your calories count. For example, you are far better off eating 200 calories of fruits and vegetables rather than 200 calories of candy. Not only will 200 calories of fruits and vegetables fill you up more, but they contain more useful 'stuff' in them such as vitamins and minerals.

To learn more about calories, you can read one of my past blogs here.


Sources:
http://www.heartandstroke.com/site/c.ikIQLcMWJtE/b.3484023/
Photo - http://www.anthonyarroyodotcom.com/theabletoncookbook/wp-content/uploads/2011/10/Weighing-Scales-1.jpg