Submitted by: Submitted by sethvdheever
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Date Submitted: 02/03/2016 03:59 AM
Cardiovascular Effects of Exercise
Exercise 1: ECG during rest and after exercise
Study Exercise
Add comments to the recording to indicate the location of each of the follow ing: the P-w ave, the QRS complex,
and the T-w ave.
W hat happened to the R-R interval and the heart rate after exercise?
2.
The R-R interval consists of the sum of QRS, S-T, T-P and P-R. W hich of these became shorter w hen the
heart rate increased?
3.
Immediately after exercise, w as the amplitude of the pulse smaller or larger than in the resting record?
4.
W hat happened to the pulse amplitude during recovery from exercise?
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1.
During exercise, blood flow in the skin and finger pulp is usually reduced by sympathetic vasoconstrictor
nerve activity. After exercise, how ever, skin and finger blood flow may be increased. W hy is the blood flow
to extremities reduced during exercise? W hy does it increase to higher than normal levels during recovery?
W hat other factors may influence the supply of blood to the skin and fingers during and after exercise?
6.
Changes in the cardiovascular system are only some of a number of changes that occur in the body during
and after exercise. W hat other physical changes did you observe in the volunteer?
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5.
Exercise 2: Pulse after hand exercise
Immediately after hand exercise, w as the amplitude of the pulse smaller or larger than in the resting record?
8.
W hat happened to the pulse amplitude during recovery from hand exercise?
9.
The muscles active during hand exercise are mainly in the forearm, w ith a few small muscles in the hand.
W ould you expect blood flow to these muscles to increase during exercise?
10.
There are no muscles in the distal segment of the fingers. W ould you expect the increased muscle blood
flow in exercise to affect the blood flow under the finger pulse transducer?
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