Physiological responses of women during lifting exercise |
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| Authors: | Dr C A Williams J S Petrofsky A R Lind |
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| Institution: | (1) Present address: Department of Physiology, East Tennessee State University College of Medicine, Johnson City, TN, USA;(2) Present address: Department of Engineering, Wright State University, Dayton, OH, USA;(3) Department of Physiology, St. Louis University School of Medicine, 63104 St. Louis, MO, USA;(4) Dept. of Physiology, East Tennessee State University, Quillen-Dishner College of Medicine, P.O. Box 19780A, 37614 Johnson City, TN, USA |
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| Abstract: | Summary Physiological responses were measured in 7 women subjects who lifted boxes weighing 6.8, 15.9 or 22.7 kg from the floor to a height of 60 cm. After training and establishing the
O2 max, the boxes were lifted for 1 h at 30, 50, and 60%
O2 max. The changes in heart rate,
O2, the integrated EMG during lifting and the loss of isometric hand-grip endurance after lifting were used to assess the development of fatigue. There was no evidence of fatigue at 30%
O2 max but fatigue did exist in some conditions at 50% and in all conditions at 60%
O2 max. It is suggested that fatigue is unlikely to occur while lifting boxes up to 15.9 kg weight at 35–40%
O2 max, i.e., at rates of lifting varying from 5 to 7 times per min. |
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| Keywords: | Fatigue Oxygen uptake Isometric and rhythmic exercise Women Lifting exercise |
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