International Journal of Current Research and Review
ISSN: 2231-2196 (Print)ISSN: 0975-5241 (Online)
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IJCRR - 5(10), May, 2013

Pages: 120-127

Date of Publication: 25-May-2013


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COMPARE THE EFFECTS OF STATIC STRETCH AND WARM UP EXERCISES VERSUS STATIC STRETCH ON HAMSTRING TIGHTNESS AMONG STUDENT POPULATION

Author: Patchava Apparao, A. Chaturvedi Pilladi, W. Meerabai Devi, CH. Ashok Chakravarthi

Category: Healthcare

Abstract:Objectives: The purpose of the study was 1) To find the effect of warm-up exercise and static stretch on the flexibility of Hamstring muscles among student population and 2) To compare the efficacy of static stretch with and without warm-up exercise on hamstring length. Methods: Thirty volunteer subjects (ages 18-23 years) with limited Hamstring length were assigned to two groups: (1) static stretch, (2) static stretch and warm-up. The Static stretch group consisted of one repetition of static stretch per a day for 30 sec duration, 5 times a week for 6 weeks. Stair climbing for 10 minutes is given as Warm up before the stretching in group (2). Hamstring length was measured pre intervention and post intervention using the active knee extension (AKE) test. Data were analyzed using a student paired t test and a chi square test to find out the difference between the groups. Results: Group 1 & 2 showed a significant increase in hamstring length between pre intervention and post intervention measurements. After 6 weeks, Group 2 had a mean increase of 22.14\?and group 1 had a mean increase of 15.1\? in AKE. Both of these groups did show a significant decrease (22.14\? and 15.1\?, respectively) in hamstring muscle length. However Group 1 and 2 did not differ significantly from each other. Conclusions: A significant increase in hamstring length when using static stretching. The addition of a warm-up exercise prior to stretching does not appear to significantly increase the effectiveness of static hamstring stretching.

Keywords: flexibility, lower extremity, muscle length, stretching, warm-up.

Full Text:

INTRODUCTION
Hamstring Injuries are one of the most common musculotendinous injuries in the lower extremity4 . Reported factors that contribute to hamstring injuries include the lack of muscle extensibility, improper warm up, fatigue and poor body mechanics10. Lack of Hamstring Flexibility is the single most important characteristic of hamstring Injuries23 . Static stretching is one of the safest and most commonly performed stretching methods used to increase muscle length18 . The Literature supports that a static stretch of 30 sec at a frequency of one repetition per day, five days a Week for 6 weeks is sufficient to increase muscle length3 . A warm up is different from static stretch, but it can include in stretching. In most sports or physical activities, stretching exercises have been included as a part of a warm up routine that includes a substantial movement. Active warm up can include stretching or may be based on other kinds of movement. An active warm up will reduce injury, though not necessarily it includes stretching. The active part of the warm up is what really prepares the muscles for activity by increasing blood flow and tempareture1,11 . Warm up and stretching are advocated by clinicians to increase muscle length and performance and to limit muscle injuries1 . There is insufficient evidence that warm-up exercises alone or followed by a stretch will significantly increase flexibility1 . Wenosol at al (2004) stated that an active warm up before PNF stretching appears to be the most effective treatment to increase hip range of motion. Active warm up reduces the resistance to stretch there by increases the range of motion12 . ZAKAS A et al (2003) stated that warm up exercises are equally effective in increasing range of motion compared to warm up and stretching16 . Willford et al compared the effects of jogging for 5 min before stretching with stretching alone and also found no significant differences. 5 minute warm- up is relatively short, however and they gave no guidelines for warm up14 . In many situations especially recreational activities a muscle is forced to stretch beyond its normal active limits. If the muscle does not have enough elasticity to compensate for this additional stretch, the musculotendinous units may be injured, In order to attain good flexibility the extensibility of the muscle are very essential3 . Physical therapist has used many different methods of stretching to improve flexibility. But no studies are available to evaluate the effects of warm up with static stretching to enhance ROM at knee. Research is limited on the effects of static stretching and is controversial on the combined. Effects of warm-up activities and static stretching on muscle lengthening. The purpose of this study was 1. To compare the efficacy of static stretch with and without prior warm up exercise on Hamstring length. 2. To find the effect of warm-up exercise and static stretch on the flexibility of Hamstring muscles among student population.

MATERIAL AND METHODS
50 male students were examined in which 35 students found to have hamstring tightness. In which 4 students dropped from the study because of personal reasons and one subject was absent continuously more than 4 stretching’s. All the students between the age group of 18 to 23 years (Mean age 20.2 years) at Swatantra Institute of Physiotherapy & Rehabilitation, Rajahmundry, formed the population of this study. Subjects were selected by Active knee Extension test (A.K.E) 21 for measurement of Tight Hamstring muscles. Subjects Age, height and weight were matched. Informed consent was taken from all the Subjects.

Inclusive Criteria
1) Males of Age between 18 to 22 years.

2) Subjects without any musculo skeletal disorders.

3) Subjects with tight Hamstrings (Measured by Active knee Extension test).

4) Subjects who are not undergoing any physical fitness training program.

Exclusive Criteria
1) Previous history of hip or knee or spine injuries.

2) Any contractures or deformities.

3) Subjects having Neuro muscular disorders

4) Subjects having Cardio vascular disorders.

5) Any subjects missing 4 days without stretching

6) Subjects involving in any other physical fitness program

STUDY DESIGN
Study was experimental longitudinal design Subjects were randomly assigned to two groups following the initial measurement of hamstring flexibility. Subjects assigned to group –I (N=15, x age = 20 .4 range 18-23 years) served as control group and performs static stretching and did not perform any warm up exercises Group II served as a experimental group and performed static stretching and warm up exercise for 10 min (N=15, x age = 19.93 range 18-23 years) Subjects in group – II performed stretching 5 times a week for 6 weeks one repetition per day for 30sec duration.

The dependent variable was hamstring length and it was measured in degrees using the AKE test as described by Gajdosik and Lustin12. Pre stretch AKE ROM was measured on all subjects. Following interventions AKE ROM measured immediately. The Investigator was blinded to the measurements.

Mesurement Procedure
Subject Position for AKE(Active Knee Extension Test) Testing: With Subjects lying on their left sides, the greater trochanter of the right femur, lateral femoral condoyle and lateral malleolus of right fibula were identified and marked with black felt – tip marker to help ensure proper alignment for Goniometric measurements25. Subjects were positioned supine on an examination table with the hip flexed to 900 as measured by a Goniometer. 900 of hip flexion was maintained throughout AKE measurements either by cross bar or by the assistant. The investigator ensured that the distal anterior thigh maintained contact with the cross bar for all AKE measurements throughout the AKE procedure, the left hip remained at 00 of flexion5 . A Goniometer placed lateral side of the knee stationary arm towards the femur and movable arm towards the fibula5, 20 If the Knee flexion is more than or equal to 30 degree from full extension then the test is positive for hamstring tightness5 AKE testing performed three times and measurements were noted in both pre and post treatment. Mean of the measurements were taken1 .

 Instrumentation
1) Universal Goniometer: Measurements were performed using a double armed, protractor made of transparent plastic to measure degrees in 10 increments

2) Stop watch

3) Pillows

4) Straps

5) Stairs

6) Marker Pen

7) Adjustable couch

8) Pen and Note book

9) Cross bar.

Static stretching
Static hamstring stretches by standing erect with the left foot planted on the floor and pointing straight ahead (no hip internal or external rotation) The right hamstring muscle were stretched by placing the right calcaneal aspect on an elevated surface (high enough to cause a gentle stretching sensation in the posterior thigh) with the knee fully extended and toes pointed to the ceiling (again no hip internal or external rotation) the subjects then flexed forward from the hip, maintaining the spine in a neutral position while reaching the arms forward until a gentle stretch was felt in the posterior thigh. Once this position was achieved the stretch was sustained for30 sec24, 6, 20, 15 .

Warm Up Procedure
Stair climbing for 10 minutes is given as Warm up before the stretching in group II1 . Here intensity of warm up is not calculated they climb at their normal cadence. Immediately followed by warm up static stretching for 30 sec is given. Stretching procedure as same as group one1 . Performance of each stretching session by each subject was supervised and recorded on an attendance sheet to document compliance to the program. If a subject failed to attend a scheduled session, stretch was given the following rest day. Any subject missing four days without stretching was eliminated from the study (One subject dropped from group II and no subject from I group) After 6 weeks all the subjects were retested using the same procedures used in the initial pre test for AKE. Testing two days after the last day of stretching and the final measurement

OUTCOME SCALE
Universal Goniometer13 to measure the flexibility of Hamstring Muscle by Active Knee Extension Test

STATISTICAL ANALYSIS
The data was analyzed using student paired “t” test for finding the difference between the range of motion before and after the Treatment. A chi-square test was used to find out the significance between two groups.

RESULTS
In this study all the two groups (n=30) chosen are identical in pre treatment test of knee range of motion before the start of the treatment. Hence values found had no significance between the groups (Table 3 & 4) In post treatment both groups show drastic improvement in knee range of motion which was measured by active knee extension test (Fig.3). When comparing both the groups for knee joints range of motion both groups were equally effective and there was no significant improvement of flexibility in one group over the other (Fig.3)

DISCUSSION
The results of this study agree with other studies that a static stretch is effective in increasing hamstring length1, 3, and 9,10,16,17 . The gain in temporary length may be due to increase in muscular temperature following contraction leads to increased extensibility. For injury prevention warm up with static stretch is effective, if range of motion is the goal static stretch is effective. The gain also may be due to an increase in the tolerance to stretch and may not be due to changes in the structure of the muscle and connective tissue6 . When comparing both the groups for knee joints range of motion both groups were equally effective and there was no significant improvement of flexibility in one group over the other1 . Clinically warm up and static stretch group showed more improvement of range of motion than the static stretch group. Statistically there was no significant difference between the groups1 . Our results support previous findings that stretching increases Flexibility19, 20, 24 . Researchers in two studies determined that one 30sec stretch is effective for increasing Hamstring Range of motion. Subjects in these studies stretched 5 times a week for 6 weeks 3,19,24 This study supports the previous study done by De Weijer VC, Gornaik GC (2003) which states that static stretch and warm up group are equally effective in increasing flexibility and the study was for duration of one day1 . The result may be due to short duration so in this study duration so in the present study lasted for 6 weeks3, 19, 24 . Williford HN, East JB (july-1986) in their study to compare the effect of jogging and stretching versus stretching on flexibility of the muscles. They have concluded that warming the muscle prior stretching by jogging will not result in significant improvement of joint range of motion evaluated. This result may be due to jogging or less number of repetition of treatment (2 days per week for 9 weeks)7. To eliminate that in this study I have taken stair climbing for 10 minutes as warm up and the duration of the study is 30 sec static stretch one repetition a day for 5 days in a week for 6 weeks1,3 . Our results do not support the previous reports that warm up and stretching than stretching alone cause greater Range of motion22. Warren et al9 noted that the greatest increase in residual tissue length in rat tail tendons occurred when low load long duration stretch was performed once the tissues had reached elevated temparatures8,9. In our study we used active warm up; if we use passive warm up we may get better results. One might expect to find that the looser subjects would not increase in flexibility as much as the tighter subjects. In our study however, the warm up and stretching subjects increased in flexibility by almost 230 within 6 weeks while stretching group increased by 1508. This values show that clinically warm up and static stretch is more effective but statistically this group is not significant may be because of small sample size. Suggestions for future research 1. In this study intensity of the warm up is not measured. In future research intensity of the warm up should be calculated to get better result. 2. We may get better result by using Electronic Goniometer 3. Which group is effective in maintaining the obtained ROM’s? Future research should be done on it. LIMITATIONS 1. Sample size is small 2. Subjects in control group might have done other exercises with out my knowledge. 3. Used universal Goniometer. CONCLUSION The use of static stretch in group I (control group) and warm up exercises and static stretch in Group II (experimental group) resulted in increase in hamstring muscle flexibility. The result of the this study indicated that a 30 sec static stretch was equally effective as 10 minutes stair climbing and 30 sec static stretch in improving knee joint range of motion. The addition of a warm up exercise prior to stretching does not appear to significantly increase the effectiveness of static hamstring stretching. Though the warm up and stretching group is clinically significant statistically it is not significant. If range of motion is the goal static stretch is helpful. If injury prevention is the goal combination of warm up and static stretch is more effective. ACKNOWLEDGEMENT I take this opportunity to express my profound gratitude and deep regards to Dr. Ganni Bhaskara Rao, Chairman, GSL & Swatantra group of Institutions for his cordial support and guidance. I am grateful to the Ethical Committee headed by Dr.Sunil Kumar for giving clearance for my project. We acknowledge the great help received from the scholars/publishers of all those articles cited and included in the references of this manuscript. We are also grateful to the editors/Publishers of all those articles, journals and books from where the literature for this article has been reviewed and discussed. The Authors are grateful to IJCRR editorial board members and IJCRR team of reviewers who have helped to bring quality to this manuscript. I am obliged my colleagues, Ms. A. Anita Kumari and Ms. P. Keerthi Chandrasekhar & Statistician of Swatantra Institute of Physiotherapy, Rajahmundry, for their valuable information. I thank almighty, my parents, my Brother and  Friends for their constant encouragement without which this assignment is not possible.

References:

1. De Weijer V C, Gornaik G C; The effect of static stretch and warm up exercise on hamstring muscle length over the course of 24 hours.J Orthop sports Phys Ther;(Dec2003); Vol-12.

2. Ian B Stewart, Gordan G; The effect of warm up intensity on Range of motion and anaerobic performance.J Orthop sports Phys Ther;(Feb-1998); vol- 27.

3. William D Bandy Jean M Irion; The effect of time and frequency of static stretching on flexibility of the Hamstring muscles.Phys Ther(Oct-1997); vol-77.

4. Garret WE, jr., Califf JC; Histochemical correlates of Hamstring Injuries. Am J Sports Med. 1984;12:98-103

5. Scott G. Spernoga and Timothy L UHL;Duration of maintained hamstring flexibility after a one time , modified Hold -– relax stretching protocol. Journal of Athletic Training;(Mar-2001); vol-36.

6. Willy RW , Kyle B.A., Moore SA; Effect of cessation and resumption of static hamstring muscle stretching on joint range of motion. J.Orthop sports phys ther( Mar –2001) Vol –3

7. Williford HN , East JB ; Evaluation of warm – up for improvement in flexibility Am J sports Med (Jul 1986) Vol –14

8. David O,Drapper,Lisa minal et al ;The carry over effects of diathermy and stretching in developing hamstring flexibility Journal of Athletic training (Mar –2002) Vol-37

9. Warren CG,Lehmann et al; Heat & stretch procedure : An evaluation using rat tail tendon Arch phy med Rehabil (1976) vol –57

10. Worrel TW, Smith TL et al; Effect of hamstring stretching on hamstring muscle performance J. Orthop Sports Phys,Ther (Sep-1994) :20(3) PgNo. 157-159

11. Wenos DL, Konin JG Controlled Warm up enhances hip range of motion J Strength Cond res (aug 2004); 18(3) 12. Gajdosik R, Lusin G; Hamstring muscle tightness. Reliability of an active knee extension test. Phys ther (Jul –1983) ; 63(7) ;1085-90

13. Watkins MA , Riddle DL Reliability of Goniometric measurements and visual estimates of knee range of motion obtained in clinical setting. Phys ther (Feb-1991) ; 71(2);90-6

14. Williford TW, East JB Evaluation of warm up for improvement in flexibility Am J Sports Med. 1986:14;316-319.

15. Jennifer. H. Roberts et al; Effect of Stretching duration on active and passive range of motion in the lower extremity; B J Sports Med,1999;33; 259-263.

16. Zakas A , Vergou A; The effect of stretching during warm up on the flexibility of junior hand ball players. J Sports Med Phy Fitness (2003-jun); 43 (2); ;145-9.

17. Kubo K, Kanehisa et al ;The effect of stretching training on the visco elastic properties of human tendon structures in vivo. J Appl physiol (2002-feb) ; 92(20).

18. Smith CA; The warm up procedure; to stretch or not to stretch. Journal of Orthop Sports phys ther (jan-1994);19(1).

19. Bandy WD, Irion JM Effect of time on static stretch on flexibility of the Hamstring muscles Phys ther, (1994 sep) 74(9);845-50.

20. Russel T. Nelson, William D. Bandy Eccentric training and static stretching improve Hamstring Flexibility of High School Males. Journal of Athletic Training (2004 ) 30 (3) 254-258

21. Wiktorsson- Moller M, Oberg B Effects of warming up, massage and stretching on range of motion and muscle strength in the lower extremity. Am J sports Med. (1983 Jul) 11(4); 249-52 

22. Shellock FG; Warming up and stretching for improved physical performance and prevention of sports related injuries Sportsmed.(aug-198502(4).

23. Warrel TW, Perrin D; Hamstring Muscle Injury J Orthop Sports Phy Ther. 1992; 16:12-17

24. William D Brady, Jean M Irion; The effect of static stretching and dynamic range of motion training on the flexibility of the hamstring muscles. J Orthop sports Phys Ther; (Aprl1998), vol-27.

25. J.Brent Feland, J William Myrer; The effect of duration of stretching of the hamstring muscle group for increasing range of motion in people aged 65 years or older. Physical Therapy (May 2001) vol- 81



 

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A Study by Ghaffar UB et al. entitled "Correlation between Height and Foot Length in Saudi Population in Majmaah, Saudi Arabia" is awarded Best Article for Vol 12 issue 21
A Study by Siti Sarah Binti Maidin entitled "Sleep Well: Mobile Application to Address Sleeping Problems" is awarded Best Article for Vol 12 issue 20
A Study by Avijit Singh"Comparison of Post Operative Clinical Outcomes Between “Made in India” TTK Chitra Mechanical Heart Valve Versus St Jude Mechanical Heart Valve in Valve Replacement Surgery" is awarded Best Article for Vol 12 issue 19
A Study by Sonali Banerjee and Mary Mathews N. entitled "Exploring Quality of Life and Perceived Experiences Among Couples Undergoing Fertility Treatment in Western India: A Mixed Methodology" is awarded Best Article for Vol 12 issue 18
A Study by Jabbar Desai et al. entitled "Prevalence of Obstructive Airway Disease in Patients with Ischemic Heart Disease and Hypertension" is awarded Best Article for Vol 12 issue 17
A Study by Juna Byun et al. entitled "Study on Difference in Coronavirus-19 Related Anxiety between Face-to-face and Non-face-to-face Classes among University Students in South Korea" is awarded Best Article for Vol 12 issue 16
A Study by Sudha Ramachandra & Vinay Chavan entitled "Enhanced-Hybrid-Age Layered Population Structure (E-Hybrid-ALPS): A Genetic Algorithm with Adaptive Crossover for Molecular Docking Studies of Drug Discovery Process" is awarded Best article for Vol 12 issue 15
A Study by Varsha M. Shindhe et al. entitled "A Study on Effect of Smokeless Tobacco on Pulmonary Function Tests in Class IV Workers of USM-KLE (Universiti Sains Malaysia-Karnataka Lingayat Education Society) International Medical Programme, Belagavi" is awarded Best article of Vol 12 issue 14, July 2020
A study by Amruta Choudhary et al. entitled "Family Planning Knowledge, Attitude and Practice Among Women of Reproductive Age from Rural Area of Central India" is awarded Best Article for special issue "Modern Therapeutics Applications"
A study by Raunak Das entitled "Study of Cardiovascular Dysfunctions in Interstitial Lung Diseas epatients by Correlating the Levels of Serum NT PRO BNP and Microalbuminuria (Biomarkers of Cardiovascular Dysfunction) with Echocardiographic, Bronchoscopic and HighResolution Computed Tomography Findings of These ILD Patients" is awarded Best Article of Vol 12 issue 13 
A Study by Kannamani Ramasamy et al. entitled "COVID-19 Situation at Chennai City – Forecasting for the Better Pandemic Management" is awarded best article for  Vol 12 issue 12
A Study by Muhammet Lutfi SELCUK and Fatma entitled "Distinction of Gray and White Matter for Some Histological Staining Methods in New Zealand Rabbit's Brain" is awarded best article for  Vol 12 issue 11
A Study by Anamul Haq et al. entitled "Etiology of Abnormal Uterine Bleeding in Adolescents – Emphasis Upon Polycystic Ovarian Syndrome" is awarded best article for  Vol 12 issue 10
A Study by entitled "Estimation of Reference Interval of Serum Progesterone During Three Trimesters of Normal Pregnancy in a Tertiary Care Hospital of Kolkata" is awarded best article for  Vol 12 issue 09
A Study by Ilona Gracie De Souza & Pavan Kumar G. entitled "Effect of Releasing Myofascial Chain in Patients with Patellofemoral Pain Syndrome - A Randomized Clinical Trial" is awarded best article for  Vol 12 issue 08
A Study by Virendra Atam et. al. entitled "Clinical Profile and Short - Term Mortality Predictors in Acute Stroke with Emphasis on Stress Hyperglycemia and THRIVE Score : An Observational Study" is awarded best article for  Vol 12 issue 07
A Study by K. Krupashree et. al. entitled "Protective Effects of Picrorhizakurroa Against Fumonisin B1 Induced Hepatotoxicity in Mice" is awarded best article for issue Vol 10 issue 20
A study by Mithun K.P. et al "Larvicidal Activity of Crude Solanum Nigrum Leaf and Berries Extract Against Dengue Vector-Aedesaegypti" is awarded Best Article for Vol 10 issue 14 of IJCRR
A study by Asha Menon "Women in Child Care and Early Education: Truly Nontraditional Work" is awarded Best Article for Vol 10 issue 13
A study by Deep J. M. "Prevalence of Molar-Incisor Hypomineralization in 7-13 Years Old Children of Biratnagar, Nepal: A Cross Sectional Study" is awarded Best Article for Vol 10 issue 11 of IJCRR
A review by Chitra et al to analyse relation between Obesity and Type 2 diabetes is awarded 'Best Article' for Vol 10 issue 10 by IJCRR. 
A study by Karanpreet et al "Pregnancy Induced Hypertension: A Study on Its Multisystem Involvement" is given Best Paper Award for Vol 10 issue 09

List of Awardees

A Study by Ese Anibor et al. "Evaluation of Temporomandibular Joint Disorders Among Delta State University Students in Abraka, Nigeria" from Vol 13 issue 16 received Emerging Researcher Award


A Study by Alkhansa Mahmoud et al. entitled "mRNA Expression of Somatostatin Receptors (1-5) in MCF7 and MDA-MB231 Breast Cancer Cells" from Vol 13 issue 06 received Emerging Researcher Award


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International Journal of Current Research and Review (IJCRR) provides platform for researchers to publish and discuss their original research and review work. IJCRR can not be held responsible for views, opinions and written statements of researchers published in this journal

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