Abstract des Autors

Fifty healthy university women participated in a study measuring the association between two countermovement vertical jumps and a variety of structural and functional musculoskeletal variables. A squat incorporating "restricted" upper body mitions served as the countermovement preceding the first style of jumping, while the second jumping style involved a depth jump with unrestricted upper body motions. Also, nine functional measurements for each of six isokinetic squaat speeds ranging from 25 to 100 deg/s were obtained. The squat exercises were modifications of previously reported protocols, therefore the reliabilities of all 54 measurements were assessed prior to their use as potential factors associated wwith jumping ability. Reliability coefficients ranged, from very high to moderate, except for rise time at 180 deg/s and peak hold time at 25 deg/s being loww. All force and power variables were significantly correlated with jumping performance. The highest correlations occurred with peak power at 70 and 85 deg/s and average-force-to-body-weight ratio at 85 deg/s. No significant correlation was found between jumping performance and % body fat. Verf.-Referat