The effect of various relaxation intervals of the modified contract-relax technique on passive knee extension range of motion in healthy adults

Objectives: To evaluate the effect of various relaxation intervals of the modified contract-relax technique on passive knee extension range of motion in healthy adults. Design: Quasi-experimental and Pre & Post-test type. Setting: The study was conducted at SRM Medical Hospital & Research Center, Kattankulathur. Procedure: 30 Subjects of healthy college students are divided into three groups and given with various relaxation intervals of the modified contract-relax technique on passive knee extension range of motion. Results: There was significant difference between the groups of range of motion on passive knee extension and the value of P<0.001. Conclusion: The duration of the relaxation interval affects gains in ROM when applying modified contract-relax technique. Subjects using a 4 second relaxation interval achieved greater gains in passive knee extension ROM than those using either 0 or 8 second relaxation interval.