Triaxial Accelerometer to evaluate performance in kayak paddling on water

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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.