Akademik Veri Yönetim Sistemi
JOURNAL OF SPORT REHABILITATION, cilt.17, sa.2, ss.186-205, 2008 (SCI-Expanded)
Context: There is limited information on the effects of different warm-up periods on proprioception and balance in the context of injury prevention. Objective: To determine the effects of warm-up exercises on knee proprioception and balance and to compare the effectiveness of warming up periods. Design: Pretest/posttest. Setting: Research laboratory. Participants: 30 healthy subjects (19 women, 11 men; mean age 20.70 +/- 0.99 years). Interventions: Exercise groups performed warm-up exercises (group 1, 5 minutes; group 2, 10 minutes). Joint Position Sense (JPS) was tested at 15 degrees, 30 degrees, and 60 degrees knee flexion (KF) on a JPS device. Balance was measured using the Neurocom Balance Master System. Main Outcome Measures: JPS absolute error (AE) was measured at 15 degrees, 30 degrees, and 60 degrees KF and postural control was measured. Results: After exercise, we found significant improvements for AE of JPSs of 30 degrees right (R) KF, 15 degrees left (L) KF, and 60 degrees L KF in group 1. In group 2, AE of JPS values increased for all angles of both knees except 60 degrees R KR AE of JPS values of 15 degrees R KF, 30 degrees R KF, 15 degrees L KF, 60 degrees L KF were significantly different in group 2 compared with group 1. In balance measurements, there were significant improvements for standing on foam with eyes closed (EC) position, velocity and R-L unilateral stance EC in group 1. There were significant improvements for velocity, end point, maximum excursion, and L unilateral stance EC in group 2. Conclusions: Both warm-up periods have positive effects on knee proprioception and balance. The 10-minute warm-up exercise improved proprioception by a greater amount than the 5 minutes warm-up exercise. Keywords: Joint position sense, warm-up exercise, knee, balance