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Cardiorespiratory
endurance refers to the ability of the circulatory and respiratory systems
to supply oxygen and nutrients to working muscles during sustained physical
activities. Cardiorespiratory endurance also involves the ability to transport
waste products away from the working muscles.
How to monitor
exercise heart rate
During exercise, our
heart rate increases as the exercise intensity increases, we could measure
our heart rate in order to monitor our exercise intensity. In the beginning
of an exercise bout, however, the heart rate increases quickly in a short
time, it would be best for us to continue exercise until the heart rate
has reached a steady state before we measure it, for that's when it truly
reflects our exercise heart rate.
Intensity (how
strenuously a person exercises)
Target Heart Rate
(THR) for estimating intensity for aerobic exercise:
THR = Intensity
(%) x Maximum Heart Rate (HRmax),
where HRmax = 220
- Age
** Recommended training
intensity for aerobic fitness is 60% - 90%.**
e.g. The target training
heart rates for a 20-year-old are:
At 60%: THR = 60% x HRmax = 0.6 x (220-20) = 120 bpm (beats per minute)
At 90%, substitute 0.9 for 0.6 in the above calculation, = 180 bpm.
Therefore, the target
training heart rate for the 20-year-old should fall between 120 - 180
bpm.
Heart rate can be
measured through the following means:
- Electronic Heart
Rate Monitors
Commonly sold
on the market. All you need is to wear a belt across your chest, and
a corresponding watch to receive the electronic signals from the belt
and display the information.
- Manually Checking
Pulse
By putting your
index and middle fingers together, apply slight but firm pressure
on the carotid artery at the side of your throat, or alternatively
apply the pressure at the ulnar side of your wrist to feel a pulse.
Keep counting for 10 sec., 15 sec., or 30 sec. and calculate the one-minute
count.
Different Modes
of Cardiovascular Training
Aerobic Exercise:
Any activity that involves large muscle groups, which can be maintained
continuously, and is rhythmical and aerobic in nature, e.g. walking, hiking,
running/jogging, cycling, cross-country skiing, dancing, rope-skipping,
rowing, swimming, skating, roller-blading, and various endurance game
activities. But if you are using ball games as the training mode, you
must make sure that the rest time, or small breaks between points are
not so long that your heart rate falls below your training heart rate
zone.
Circuit training:
A sequence of 8 - 12 training stations which may include weight training,
calisthenics exercises (e.g. push-ups, sit-ups), and/or aerobic exercise
(e.g. rope-skipping, machine-rowing). may also be used to elicit improvements
in cardiovascular endurance. Since there are no breaks between exercise
stations in this form of training, the cardiovascular system would come
into play.
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