Abstract
1502 The purpose of this study was to investigate the effect of turning movement on the three-dimensional moments at the ankle, knee, and hip joints. Data were collected using video cameras and force plate. Eight male recreational basketball players were tested during fast running (4.5m/s) and when cutting to the right or left (+60, +30, 0, −30, and −60°). The inverse dynamics approach was used to integrate the body segment parameter, kinetic and force plate data, and to solve the resultant joint moments. At the ankle joint, turning movement did not affect dorsi/plantar flexion moments. However, the maximum inversion moment increased 142% (33 Nm) during +60° turning compared to straight running; the maximum abduction moment increased 200% (36 Nm) during −60° turning while the maximum adduction moment increased 300% (35 Nm) during +60° turning compared to straight running. At the knee joint, the maximum abduction and adduction moment increased with medial and lateral turning, 130% and 750% respectively (compared to straight running). Maximum internal rotation moments increased only slightly with medial turning movement. For the maximum extension moment, there was a 60% (92 Nm) increase during +60° turning compared to straight running. At the hip joint, flexion-extension moments were unchanged with turning while maximum internal rotation moment increased 140% (37 Nm) during −60° turning and maximum external rotation moment increased 280% (115 Nm) during +60° turning compared to straight running. The maximum abduction and adduction moment increased 300% with lateral and medial turning, respectively. These findings reinforce the intuitive notion that fast medio-lateral turning movements produce substantially greater musculoskeletal stresses on joint structures than does straight running.
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