Effect of resistance on performance in double poling

Abstract

The purpose of this study was to investigate what effect resistance would have on performance in double poling, with focus on power output, physiological responses and myoelectric activation. 6 elite male cross country skiers were exposed to simulated double poling in a Concept II Ski Ergometer at two different resistances, respectively low and high. The major findings were that power output significantly increased with the higher resistance, as well as work per cycle. These findings are previously shown in earlier research. Cycle rate remained unchanged, while stroke time increased. Earlier studies have confirmed that stroke time increase at added resistance or incline, to utilize a longer period of the cycle time to produce the required force to overcome the resistance or incline. Gross efficiency did not differ between the resistances, and no significant changes in electromyography activity were present. The increase in power output and work per cycle was therefore not attributed to an increased muscle activity. The main findings in this study are therefore inconclusive, and the increase in power output and work per cycle could be caused by other factors, such as muscle coordination and timing or changes in technical execution.