Francisco Ayala and Pilar Sainz de Baranda Andujar

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Purpose: To evaluate the efficacy of 3 different durations of active stretch (12 x :15, 6 x :30 and 4 x :45) in hamstring stretching exercise program on lower extremity range of motion in young adults.

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Conclusions: No significant differences were found between the three treatment groups.

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IN PLAIN ENGLISH: 12 x :15, 6 x :30 and 4 x :45 single duration active stretching will all work in increasing hamstring length when performed 3 days/week for 12 weeks in young adults.