If you have found the enthusiasm to begin an exercise
regimen, the quickest way to cool your resolve is to do too much too fast,
cautions Dr. Leonore Zohman. So we would
advise those who want to exercise to begin a program gradually, regularly and
progressively. This will of course
require self-discipline.
Ideally, a previously sedentary prospective exerciser should
have a checkup by his physician including an examination of the cardiovascular
system, blood pressure, muscles and joints.
His blood should be analyzed for cholesterol and triglycerides and a
resting electrocardiogram should be evaluated.
Most importantly, the examination before starting an
exercise program should include an exercise stress test.
Guidelines For Exercising.
There is an amount (intensity or vigorousness) of exercise which is
enough to condition the muscles and cardiovascular system leading to physical
fitness, but is not overly strenuous.
That is, there is a target zone in which there is enough activity to
achieve fitness, but not too much to exceed safe limits. The name of the game is finding your target
zone.
Each individual’s target zone is between 60 to 80 percent of
his own maximum aerobic power. Below 60
percent of his capacity he achieves little fitness benefit – unless he has been
bedridden for a prolonged period. Above
80 percent there is little benefit from a great deal of extra exercise.
The concept of maximal aerobic power (sometimes called
maximal aerobic capacity or maximal oxygen intake) is merely the technical
description of the fact that there is a point for each of us where, despite our
best efforts, the heart and circulation cannot deliver any more oxygen to the
tissues and we cannot exercise much longer or harder without approaching
exhaustion.
At this point, the lungs are making oxygen available to the
bloodstream but that oxygen cannot be transported by the blood to the muscles
fast enough to create energy for exercise.
The muscles cannot work aerobically anymore. Almost simultaneously with reaching this
limitation of oxygen supply, the heart becomes unable to beat any faster.
Having begun your exercise program, certain situations may
occur which indicate that you are doing too much. It is possible that exercising in the hot
weather or at a higher altitude, or even under circumstances of competition may
be causing your heart rate to climb faster than you suspect. Under such circumstances, your bodily
awareness of your heart rate level may be inaccurate and inadvertently, you may
overdo it.
(In Part 2, we will be discussing important medical
questions to help you decide whether or not to see your doctor before starting
an exercise training program. – J.P.)