Triaxial Accelerometer to evaluate performance in kayak paddling on water

采用安装在6名大学生运动员背部下部的三轴加速度计对皮划艇的运动成绩进行了评估。首先，在模拟机器上进行的递增划桨训练中，总冲量(3个方向身体加速度之和的平方根)与摄氧量和功输出高度相关。这些结果表明，皮划艇运动中的总冲量与功率输出和摄氧量有关。第二，在皮划艇的坡道增量划水练习中，船速与总冲量的关系出现拐点。船在水中的推进阻力与平均速度的平方成正比。拐点可能反映了随着船速的增加，产生推进阻力所需能量的移动量的增加。三轴身体加速度计可以用来评估皮划艇在水上的划桨练习。

We evaluated kayak paddling performance using a triaxial accelerometer that was fitted on the lower back of 6 collegiate athletes.First, during stepwise incremental paddling exercise on a simulated machine, the total impulse (the square root of summed body-acceleration in each of 3 directions) was highly correlated with oxygen uptake and work output. These results suggest that the total impulse is related to power output and oxygen uptake during kayak paddling exercise. Second, during the ramp incremental paddling exercise on a kayak boat, there was an inflection point in the relationship between boat speed and total impulse. The propulsive drag of a boat in water increases as the square of average speed. The inflection point may have reflected the increase in amount of movement that occurred to produce the energy required by the increase in propulsive drag as boat speed increased.The triaxial body accelerometer can be used to evaluate paddling exercise in kayak on water.