Response to Reeve and Proctor |
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| Authors: | James H Cauraugh |
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| Institution: | Motor Behavior Lab in the Department of Exercise and Sport Sciences , University of Florida , USA |
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| Abstract: | Abstract Twelve subjects were used to determine the effect of isotonic and isometric exercises on heart rate using a military press in a sitting position. The isotonic exercise was performed for 45 sec. with one half of maximum resistance, and the isometric exercises were performed for 45 sec, with one half, two thirds, and maximum resistance. The results indicated that isometric exercise performed for 45 sec. with one half of maximum resistance could stimulate heart rate to the same extent that isotonic exercise could, using the same intensity and duration. The results also showed that increasing the load in isometric contraction resulted in a proportional increase in heart rate and that increasing the load to maximum isometric contraction resulted in a near twofold increase in heart rate. |
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