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Journal Article
Research Support, Non-U.S. Gov't
Effects of a power-focussed resistance training intervention on backward grinding performance in America's Cup sailing.
Sports Biomechanics 2009 November
This study determined whether backward grinding performance in America's Cup sailing could be improved using a training intervention to increase power capability in the upper-body pull movement. Fourteen elite male sailors (34.9 +/- 5.9 years; 98.1 +/- 14.4 kg; 186.6 +/- 7.7 cm) were allocated into experimental (speed-focussed) and control groups. Grinding performance was assessed using a grinding ergometer and an instrumented Smith machine measured force, velocity and power during the bench pull exercise. Conventional training produced significant improvements in bench pull 1 RM (5.2 +/- 4.0%; p = 0.016) and maximum force production (5.4 +/- 4.0%; p = 0.014). Speed-focussed training improved maximum power (7.8 +/- 4.9%; p = 0.009), power at 1 RM (10.3 +/- 8.9%; p = 0.019) and maximum velocity (8.4 +/- 2.6%; p = 0.0002). Backward grinding performance showed greater improvements in the experimental group than the control group for moderate (+1.8%) and heavy load (+6.0%) grinding. Changes in maximum power output and power at 1 RM had large correlations (r = 0.56-0.61) with changes in both moderate and heavy load grinding performance. Time to peak force had the strongest relationship, explaining 70% of the change in heavy load grinding performance. Although the performance benefit was not entirely clear the likelihood of a detrimental effect was low (< 5%) and therefore implementation could be recommended.
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