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Two force sensing resistor force transducers were utilized to measure the forces on the hand of seven skilled tennis players performing the tennis forehand drive. Repeatable gripping force patterns were recorded for the subjects given the experimental protocol used for the study. The magnitude of the peak postimpact force on the hand was highly variable, ranging from 4 to 309 N, and was found to be related to high-frequency vibrations of the racket. There was less variability in the magnitude of preimpact gripping forces, indicating that the subjects utilized a consistent gripping pattern in preparation for impact. The large within- and between-subject variability of postimpact forces warrant further study in order to establish the range of loadings in tennis play that may be related to overuse injuries.
Duane V. Knudson is with the Department of HPER, Baylor University, BU Box 7313, Waco, TX 76798-7313. Scott C. White is with the School of Health Related Professions, SUNY at Buffalo, 435 Stockton Kimball Tower, Buffalo, NY 14214.