Summary
Blood samples were obtained from six young men before, and over a 60-min period following a bout of heavy-resistance weight lifting to determine changes in plasma volume. Weight lifting consisted of three sets of four exercises (arm curl, bench press, bent-arm row, and squat) performed using 70% of one-repetition maximum for as many repetitions as possible. Plasma volume change was determined from haematocrit and haemoglobin concentration. During weight lifting, mean oxygen uptake and heart rate were 1.96 L · min−1 and 158 bt · min−1, respectively. Plasma volume was decreased −14.3% (p<0.05) immediately following exercise and −7.0% (p<0.05) at 15 min into recovery, but had returned to the resting level within 30 min. It was concluded that heavy-resistance weight lifting elicits a significant decrease in plasma volume, which is similar in magnitude to that observed during running and cycling at 80–95% of maximal oxygen uptake.
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Collins, M.A., Hill, D.W., Cureton, K.J. et al. Plasma volume change during heavy-resistance weight lifting. Europ. J. Appl. Physiol. 55, 44–48 (1986). https://doi.org/10.1007/BF00422891
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DOI: https://doi.org/10.1007/BF00422891