PNF and Movement

Korea Proprioceptive Neuromuscular Facilitation Association (대한고유수용성신경근촉진법학회)
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Effects of Proprioceptive Neuromuscular Facilitation Relaxation Techniques on Hamstring Flexibility and Vertical Jump Performance

고유수용성신경근촉진법 이완기법이 뒤넙다리근 유연성과 점프수행력에 미치는 영향

  • Lim, Jae-Heon (Department of Physical Therapy, Seonam University) ;
  • Lee, Min-Kook (Department of Physical Therapy, Seonam University) ;
  • Park, Jong-Hyuk (Department of Physical Therapy, Seonam University) ;
  • Jung, Tae-Ho (Department of Physical Therapy, Seonam University) ;
  • Jo, Eun-Bi (Department of Physical Therapy, Seonam University)
  • 임재헌 (서남대학교 물리치료학과) ;
  • 이민국 (서남대학교 물리치료학과) ;
  • 박종혁 (서남대학교 물리치료학과) ;
  • 정태호 (서남대학교 물리치료학과) ;
  • 조은비 (서남대학교 물리치료학과)
  • Received : 2015.08.15
  • Accepted : 2015.09.03
  • Published : 2015.09.30
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Abstract

Purpose: The purpose of this study was to assess the effect of the proprioceptive neuromuscular facilitation (PNF) relaxation technique (hold relax; HR, contract relax; CR) and static stretch (SS) on hamstring flexibility and vertical jump performance in healthy adults over a four-week period. Methods: Twenty-four healthy adults volunteered to participate in PNF and static stretch sessions. The subjects were divided into three groups as follows: 8 subjects in the SS group, 8 subjects in the HR group, and 8 subjects in the CR group. In the HR and CR groups, contractions lasted 15 seconds per trial and consisted of 5 sets of 15 seconds of hamstring contraction immediately followed by 15 seconds of passive static hamstring stretching. For the static group, the participants were asked to stretch by hanging a leg over a table for 30 seconds. Subjects in all groups performed the exercises three days per week for 4 weeks. The active straight leg raising (ASLR) test, active knee extension (AKE) test, and vertical jump test were performed before the intervention and after 1, 2, and 4 weeks. Results: The SS, HR, and CR techniques effected positive improvement in hamstring flexibility and vertical jump performances but neither of the stretching methods had any statistically significant different effects according to group, although there were interactions (between group and time) in the ALSR group from 1 week to 2 week and in the AKE test from pretest to 1 week. Conclusion: Based on the results of the current study, SS, HR, and CR were shown to affect hamstring flexibility and vertical jump performance in healthy adults. In particular, it was determined that within a short period, hamstring flexibility could be attributed more to CR than to SS.

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References

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