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"Sport Medicine Journal" No.8 - 2006

The effect of maximal isometric contraction training in various knee positions on physical capacity of healthy quadriceps muscle

Baskan E. , Cavlak U. , Telli O.
Pamukkale University, School of Physical Therapy and Rehabilitation, Denizli, TURKEY


Aim: The aim of the study was to determine the effects of isometric training of quadriceps femoris muscle in various knee positions. Methods: Twenty healthy university students were divided into two groups. In sitting position maximal isometric contraction exercises were performed the knee at 15º flexion (Group I) and 60º flexion (Group II). Training program was designed 3 times a week for 6 weeks. Following tests were performed before and after training: one leg squat, step-up, step-down, one-leg hop, triple jump and one repetition. Results: In both group, all test scores were increased after training (p<0.05). On the other hand, Group II had higher scores compared with the Group I (p>0.05). Conclusion: The results of the study showed that maximal isometric contraction training program at knee 60º flexion is much more effective to increase physical capacity of the quadriceps muscle than at knee 15º flexion.

Key words:

muscle strength, isometric exercises, knee angle.

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