The Effect of Different Intensities of Static Stretching, as Measured by Hand-held Dynamometer, and the Relationship with Perceived Amount of Pain

국문 초록 (Abstract)

이 연구는 정적 스트레칭의 강도 차이가 뒤넙다리근 유연성에 미치는 효과 및 강도에 따른 통증 자각정도 차이를 보고자 하였다. 피험자는 스트레칭 강도에 따라 무작위로 3가지 집단(50 N, 70 N, 90 N)으로 나뉘었다. 스트레칭 이후 피험자의 통증 자각 정도를 기록하였으며, 뒤넙다리근 유연성은 능동무릎 폄 검사를 통해 측정하였다. 이때, 스트레칭 강도는 휴대용 근력계를 이용하여 측정하였다. 강도에 따른 유연성은 그룹간 유의미한 차이를 보이지 않았으나, 증가된 유연성의 감소는 50 N 그룹에서 가장 빠르게 관찰되었다. 또한, 스트레칭 강도는 통증 자각정도에 유의한 차이를 보이지 않았다. 주관적인 통증 자각 정도에 의존하기 보다는 휴대용 근력계를 이용한 정량적 스트레칭의 수행이 임상에서 추천될 수 있다.

다국어 초록 (Multilingual Abstract)

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.

목차 (Table of Contents)

• Key messages
• Abstract
• Introduction
• Materials and Methods
• Results
• Discussion
• References

참고문헌 (Reference)

1 김옥희, "무용동작치료 프로그램이 신경증 환자의 신체화, 우울, 불안, 감정표현불능에 미치는 효과" 대한스트레스학회 17 (17): 99-109, 2009

2 김명화, "몸과 마음의 이완을 위한 스트레칭" 대한스트레스학회 16 (16): 175-180, 2008

3 Woods K, "Warm-up and stretching in the prevention of muscular injury" 37 (37): 1089-1099, 2007

4 Safran M, "Warm-up and muscular injury prevention. An update" 8 (8): 239-249, 1989

5 Taylor D, "Viscoelastic properties of muscle-tendon units. The biomechanical effects of stretching" 18 (18): 300-309, 1990

6 Stromberg D, "Viscoelastic description of a collagenous tissue in simple elongation" 26 (26): 857-862, 1969

7 Lakie M, "Thixotropic changes in human muscle stiffness and the effects of fatigue" 73 (73): 487-500, 1988

8 Hagbarth K, "Thixotropic behaviour of human finger flexor muscles with accompanying changes in spindle and reflex responses to stretch" 368 : 323-342, 1985

9 Thacker S, "The impact of stretching on sports injury risk: a systematic review of the literature" 36 (36): 371-378, 2004

10 Weldon S, "The efficacy of stretching for prevention of exercise-related injury: a systematic review of the literature" 8 (8): 141-150, 2003

11 Bandy W, "The effect of time on static stretch on the flexibility of the hamstring muscles" 74 (74): 845-850, 1994

12 Bandy W, "The effect of time and frequency of static stretching on flexibility of the hamstring muscles" 77 (77): 1090-1096, 1997

13 de Weijer V, "The effect of static stretch and warm-up exercise on hamstring length over the course of 24 hours" 33 (33): 727-733, 2003

14 Bandy W, "The effect of static stretch and dynamic range of motion training on the flexibility of the hamstring muscles" 27 (27): 295-300, 1998

15 Shrier I, "Stretching before exercise does not reduce the risk of local muscle injury: a critical review of the clinical and basic science literature" 9 (9): 221-227, 1999

16 Orchard J, "Return to play following muscle strains" 15 (15): 436-441, 2005

17 Lakie M, "Resonance at the wrist demonstrated by the use of a torque motor: an instrumental analysis of muscle tone in man" 353 : 265-285, 1984

18 Dixon J, "Reproducibility along a 10 cm vertical visual analogue scale" 40 (40): 87-89, 1981

19 Halbertsma J, "Repeated passive stretching: acute effect on the passive muscle moment and extensibility of short hamstrings" 80 (80): 407-414, 1999

20 Walsh E, "Postural thixotropy: a significant factor in the stiffness of paralysed limbs?" 30 (30): 113-115, 1992

21 Miller M, "Measurement of subjective phenomena in primary care research: the Visual Analogue Scale" 13 (13): 15-24, 1993

22 Rahnama N, "Injury risk associated with playing actions during competitive soccer" 36 (36): 354-359, 2002

23 Hartig D, "Increasing hamstring flexibility decreases lower extremity overuse injuries in military basic trainees" 27 (27): 173-176, 1999

24 Gabbett T, "Incidence of injury in junior and senior rugby league players" 34 (34): 849-859, 2004

25 Worrell T, "Hamstring muscle injury: the influence of strength, flexibility, warm-up, and fatigue" 16 (16): 12-18, 1992

26 Agre J, "Hamstring injuries. Proposed aetiological factors, prevention, and treatment" 2 (2): 21-33, 1985

27 Herbert R, "Effects of stretching before and after exercising on muscle soreness and risk of injury: systematic review" 325 (325): 468-, 2002

28 Young W, "Effects of static stretching volume and intensity on plantar flexor explosive force production and range of motion" 46 (46): 403-411, 2006

29 Roberts J, "Effect of stretching duration on active and passive range of motion in the lower extremity" 33 (33): 259-263, 1999

30 Amako M, "Effect of static stretching on prevention of injuries for military recruits" 168 (168): 442-446, 2003

31 Sullivan M, "Effect of pelvic position and stretching method on hamstring muscle flexibility" 24 (24): 1383-1389, 1992

32 Ford P, "Duration of maintained hamstring ROM following termination of three stretching protocols" 16 (16): 18-27, 2007

33 Spernoga S, "Duration of Maintained Hamstring Flexibility After a One-Time, Modified Hold-Relax Stretching Protocol" 36 (36): 44-48, 2001

34 Webright W, "Comparison of nonballistic active knee extension in neural slump position and static stretch techniques on hamstring flexibility" 26 (26): 7-13, 1997

35 Carlsson A, "Assessment of chronic pain. I. Aspects of the reliability and validity of the visual analogue scale" 16 (16): 87-101, 1983

36 Cipriani D, "A comparison of two stretching protocols on hip range of motion: implications for total daily stretch duration" 17 (17): 274-278, 2003