Triaxial Accelerometer to evaluate performance in kayak paddling on water

我们评估皮艇划桨性能使用三轴加速度计，安装在6名大学生运动员的下背部。首先，在模拟机器上逐步增加划水运动时，总冲量（3个方向上身体加速度总和的平方根）与摄氧量和功输出高度相关。这些结果表明，在皮艇划桨运动中，总冲量与功率输出和摄氧量有关。②皮艇坡道增量划桨运动中，艇速与总冲量的关系存在拐点；船在水中的推进阻力随着平均速度的平方而增加。拐点可能反映了随着船速的增加，为产生推进阻力增加所需的能量而发生的运动量的增加。三轴体加速度计可用于评价水上皮艇的划桨运动。

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.