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KMID : 0389420160240040264
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Korean Journal of Stress Research
2016 Volume.24 No. 4 p.264 ~ p.268
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The Effect of Different Intensities of Static Stretching, as Measured by Hand-held Dynamometer, and the Relationship with Perceived Amount of Pain
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Lim Woo-Taek
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Abstract
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The purpose of this study was to examine the effect of different intensities of static stretching, as quantitatively measured with a hand-held dynamometer, on hamstring flexibility. The relationship between the intensity of static stretching and the amount of perceived pain was also investigated. Thirty-seven subjects participated and were randomly assigned into 3 groups. Stretch was performed with 3 different hand strength intensities as measured with a hand-held dynamometer for each group: 50 N in group 1, 70 N in group 2, and 90 N in group 3. Static stretching was performed once for 30s. Active knee extension (AKE) was immediately measured and recorded as a post stretch value. Visual analogue scale (VAS) was also assessed at this time. After post-stretch measurement, additional AKE were collected at 2, 4, 6, 8, 10, 15, 20, 25, and 30 min. There were no significant differences in hamstring flexibility between groups with the intensity levels. The post-stretch values increased significantly after 2 min in group 1 (p=0.008) and after 6 min in group 2 (p=0.007) and group 3 (p=0.015). The mean VAS score was 5.2 in groups 1, 6.3 in group 2, and 6.3 in group 3. There was no correlation between VAS score and the effect of stretching (p=0.126). Our findings suggest that pain ratings might not be appropriate to determine the intensity of stretching and the use of hand-held dynamometer is highly recommended by the clinician or athletic trainer in the field because it can provide constant intensity of stretching.
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KEYWORD
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Active knee extension, Hamstring flexibility, Hand-held dynamometer, Static stretching, Visual analogue scale
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