Comparison of quadriceps muscle activities during plyometric, open and closed kinetic chain exercises

This study was conducted to compare muscle activity of quadriceps muscles during open and closed kinetic chain and plyometric exercise using electromyography.

30 Healthy people agreed to participate in this study to collect data the activity of muscles. Measured data were converted into maximum voluntary isometric contraction percentages and ratio of individual muscles to the sum of each muscle.

The open-chain exercises, closed-chain exercises, plyometric exercises all showed significant differences (P<.05).

As a result of muscular activity, rectus femoris was the most effective in an open-chain exercise, and vastus medialis oblique was the most effective in a closed-chain exercise. The results were thought to be used as a scientific basis for the selective knee extension exercise.