SWIMMING FOR DEVELOPING CARDIO RESPIRATORY ENDURANCE
Swimming
is one of the best activities for developing all-round fitness because water
supports the body weight of the swimmer, swimming places less stress than
weight-bearing activities on joints, ligaments and tendons and tends to cause
fewer injuries.
Anyone
or any combination of common swimming strokes- Front craw/stroke, breast
stroke, back stroke, butterfly stroke, side stroke or elementary back stroke
can help develop and maintain cardiorespiratory fitness. Swimming may not be as
helpful as walking, jogging or cycling for body fat loss.
Intensity,
duration and frequency: because swimming is not a weight-bearing activity and
is not done in an upright position, it elicits a lower heart rate per minute.
Therefore, you need to adjust your target heart rate zone. To calculate your
target heart rate for swimming, use the formula
Maximum swimming heart rate
(MSHR)=205-Age
Target Heart Rate Zone=65-90% of
MSHR
For
example, a 18-year old would calculate her target heart rate zone for swimming
as follows:
MSHR=205-18=185bpm
Target
heart rate zone for swimming at 65% intensity 0.65x185=120bpm at 90% intensity
0.90x185=166bpm
Base
your duration of swimming on your intensity and target calorie costs, swim at least
three times a week.
Swimming as a therapy for Scoliosis
Scoliosis
is defined as the lateral curvature of the spine.
Medical History
Miss
X was school girl in Lagos State. She was referred for the development of a
swimming programme for the adjustment of her shoulder. She has recently bend
her shoulder all the times and would like to begin a swimming therapy to help
in that regard. She is 5 feet 2inch tall and of normal weight for her height,
but she has never been in water before. She has recently had phobia for water
but no other physiological testing was done.
Development of Swimming
Prescription
Exercise physiologist organized a swimming programme for Miss X and her friends so that the programme would not be bored for her. As we progress: gradually increase the duration or the intensity or both duration and intensity of her swimming to raise her heart to a comfortable level within her heart target zone. Gradually increase her swimming intervals and decreases her rest intervals as she progress. Once she can swim the length of the pool at a pace that keeps her heart rate on target, she continues swim/rest intervals for 20minutes. Her rest intervals were between 30-45 seconds.
She lowered her heart rate. Next, she swam
two laps of the pool length per swim interval, she walk (or rest) until she
lowered her heart rate. Gradually increase the number of laps she swam
consecutively and the total duration of her session until she reached her
target calorie expenditure and fitness level. But we monitor her not to swim at
too fast a pace. She raised her heart rate too high and limits her ability to
sustain her swimming. Alternating strokes helps to rest her muscles and helps
prolong her swimming time. A variety of strokes especially free style helps her
muscle groups to connect the shoulder.
Question:
List Four (4) types of stroke in swimming.
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