Strength training and power output: Transference effects in the human quadriceps muscle

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Abstract
The effects of strength training of the quadriceps on peak power output during isokinetic cycling has been investigated in a group of 17 young healthy volunteers. Subjects trained by lifting near‐maximal loads on a leg extension machine for 12 weeks. Measurements of maximal voluntary isometric force were made at 2–3 week intervals and a continual record was kept of the weights lifted in training. Peak power output was measured at 110 rev min–1 and at either 70 or 80 rev min–1 before and after the 12 week training period. Measurements of maximum oxygen uptake (VO2max) were made on 12 subjects before and after training. The greatest change was in the weights lifted in training which increased by 160–200%. This was accompanied by a much smaller increase in maximum isometric force (3–20%). There was no significant change in peak power output at either speed. The VO2max remained unchanged with training. The role of task specificity in training is discussed in relation to training regimes for power athletes and for rehabilitation of patients with muscle weakness.

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