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Exercise
comprises innumerable forms. In general, it is
performed at a moderate level of intensity over a
relatively long period of time. For example, running
a long distance at a moderate pace is an aerobic
exercise, but sprinting is not. Playing singles
tennis, with near-continuous motion, is generally
considered aerobic activity. |
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Golf or
doubles tennis, with brief bursts of activity
punctuated by more frequent breaks, may not be
predominantly aerobic. Some sports are thus
inherently aerobic, while other aerobic exercises,
such as fartlek training or aerobic dance classes. |
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Health care, or healthcare, is the
prevention, treatment, and management of illness and the
preservation of mental and physical well being through
the services offered by the medical, nursing, and allied
health professions. Health care embraces all the goods
and services designed for your health, including
preventive, curative and palliative infections, whether
directed to individuals or to populations. The organised
provision of such services may constitute a health care
system. |
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The
higher the measured cardiorespiratory endurance
level, the more oxygen has been transported to
and used by exercising muscles, and the higher
the level of intensity at which the individual
can exercise. |
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Aerobic means with oxygen, and
refers to the use of oxygen in the body's metabolic
or energy-generating process. Many types of exercise
are aerobic, and by definition are performed at
moderate levels of intensity for extended periods of
time. |
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Aerobic capacity is defined as the maximum
amount of oxygen the body can use during a
specified period, usually during intense
exercise. It is a function both of cardiorespiratory performance and the maximum
ability to remove and utilize oxygen from
circulating blood. |
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The
individual is typically connected to a respirometer to measure oxygen
consumption, and the speed is increased
incrementally over a fixed duration of time.
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The two
types of exercise differ by the duration and
intensity of muscular contractions involved, as well
as by how energy is generated within the muscle.
Initially during aerobic exercise, glycogen is
broken down to produce glucose, which is then broken
down with the help of oxygen to generate energy. In
the absence of these carbohydrates, fat metabolism
is initiated instead. The latter is a slow process,
and is accompanied by a decline in performance
level. |
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