| Popis: |
This research aimed to develop a new index showing the effect of rebound jumping with rhythm control on the stretch-shortening cycle（ SSC）. Rebound jumping with maximum effort or rhythm control was performed by 115 healthy female subjects. The rhythm control rate was set for 6 conditions, ranging from 60 to 110 beats per minute（ bpm）, at intervals of 10 bpm. Under each condition, subjects performed about 12 consecutive rebound jumps, and five sets of stable and continuous data were used for analysis. The contact time（ CT）, air time（ AIR）, and rebound height were measured with a multi-jump tester. Jump time（ CT and AIR） became shorter as the rhythm control rate increased, and longer if the rhythm slowed. However, an increase in jump time did not necessarily permit a higher jump, and it became clear that the highest jump was associated with an optimal rhythm. As the rhythm slowed, the CT was longer than the AIR for each jump. The estimated rhythm at which the ratio of CT to AIR approached 50% was lower for those with higher jumping ability. This estimated rhythm can be used to determine whether it is possible to achieve shorter CT with rhythm control. It has been suggested that rhythm control can be used for training and that training can effectively improve exercise efficiency. These results showed the effect of continuous rebound jumping with rhythm control on SSC. |
