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Updated: Oct 13, 2025
Muscle Imbalances: Testing and Training Functional Eccentric Hamstring Strength in Athletic Populations
Published on: May 1, 2018
The effect of a Hatha Yoga practice on hamstring flexibility
Toni T LaSala1, Trayer Run-Kowzun1, Michael Figueroa1
1Department of Kinesiology, Exercise Science, William Paterson University, 300 Pompton Rd., Wayne, NJ, 07470, USA.
Purpose:
To determine the effect of a 7-week Hatha yoga intervention on hamstrings flexibility using a digital goniometer. It was hypothesized that hamstring flexibility will increase in a young healthy adult population.
Methods:
Thirty-one college-aged males and females (Mage= 21 ± 2.62) years participated in 110 minutes twice per week for a 7-week progressive yoga intervention. Pre and post-test measurements were taken to determine hamstring flexibility on the right and left leg using a digital goniometer.
Results:
A paired samples t-test indicated a significant difference in the pre and post-test on hamstring flexibility (p < .05). Results for the right leg pre-test (t(30) = -6.64, p <0.05, 95% CI (-6.14, -3.25), d = 0.77. p < 0.05 as well as a significant difference in the left pre and post-ROM (t(30) = -6.93, p <0.05, 95% CI (-2.97, -6.79), d = 0.52, p < 0.05 indicated an improvement after the intervention. Average range of motion increase was 4 degrees in both legs.
Conclusion:
Hamstring flexibility can be improved with a progressive 7-week Hatha yoga session and may be used as a modality to improve flexibility and function in activities of daily living as well and athletic performance.
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