Iwamoto, J., Abe, H., Tsukimura, Y. and Wakano, K. (2005) Relationship between Radiographic Abnormalities of Lumbar Spine and Incidence of Low Back Pain in High School Rugby Players: A Prospective Study. Scandinavian Journal of Medicine & Science in Sports, 15, 163-168.
 Sairyo, K., Katoh, S., Sakamaki, T., Komatsubara, S., Endo, K. and Yasui, N. (2003) Three Successive Stress Fractures at the Same Vertebral Level in an Adolescent Baseball Player. The American Journal of Sports Medicine, 31, 606-610.
 Feldman, D.E., Shrier, I., Rossignol, M. and Abenhaim, L. (2001) Risk Factors for the Development of Low Back Pain in Adolescence. American Journal of Epidemiology, 154, 30-36.
 Harreby, M., Nygaard, B., Jessen, T., et al. (1999) Risk Factors for Low Back Pain in a Cohort of 1389 Danish School Children: An Epidemiologic Study. European Spine Journal, 8, 444-450.
 Porter, J.L. and Wilkinson, A. (1997) A Comparative Study between Asymptomatic and Chronic Low Back Pain in 18-to 36-Year-Old Men. Spine, 22, 1508-1513.
 Kottke, F.J., Pauley, D.L. and Ptak, R.A. (1966) The Rationale for Prolonged Stretching for Correction of Shortening of Connective Tissue. Archives of Physical Medicine and Rehabilitation, 47, 345-352.
 McLean, S.M., May, S., Klaber-Moffett, J., Sharp, D.M. and Gardiner, E. (2010) Risk Factors for the Onset of Non-Specific Neck Pain: A Systematic Review. Journal of Epidemiology and Community Health, 64, 565-572.
 Kimura, T., Tsuda, Y., Uchida, S. and Eboshida, A. (2006) Association of Perceived Stress and Stiff Neck/Shoulder with Health Status: Multiple Regression Models by Gender. Hiroshima Journal of Medical Sciences, 55, 101-107.
 Ogston, J.B., Crowell, R.D. and Konowalchuk, B.K. (2016) Graded Group Exercise and Fear Avoidance Behavior Modification in the Treatment of Chronic Low Back Pain. Journal of Back and Musculoskeletal Rehabilitation, 29, 673-684.
 Ohtsuki, K. (2014) A 3-Month Follow-Up Study of the Long-Term Effects of Direct Stretching of the Tensor Fasciae Latae Muscle in Patients with Acute Lumbago Using a Single-Case Design. Journal of Physical Therapy Science, 26, 755-758.
 Sairyo, K., Kawamura, T., Mase, Y., et al. (2013) Jack-Knife Stretching Promotes Flexibility of Tight Hamstrings after 4 Weeks: A Pilot Study. European Journal of Orthopaedic Surgery & Traumatology, 23, 657-663.
 Marshall, P.W., Cashman, A. and Cheema, B.S. (2011) A Randomized Controlled Trial for the Effect of Passive Stretching on Measures of Hamstring Extensibility, Passive Stiffness, Strength, and Stretch Tolerance. Journal of Science and Medicine in Sport, 14, 535-540.
 Shadmehr, A., Hadian, M.R., Naiemi, S.S. and Jalaie, S. (2009) Hamstring Flexibility in Young Women Following Passive Stretch and Muscle Energy Technique. Journal of Back and Musculoskeletal Rehabilitation, 22, 143-148.
 Winters, M.V., Blake, C.G., Trost, J.S., et al. (2004) Passive versus Active Stretching of Hip Flexor Muscles in Subjects with Limited Hip Extension: A Randomized Clinical Trial. Physical Therapy, 84, 800-807.
 Hasebe, K., Sairyo, K., Hada, Y., et al. (2014) Spino-Pelvic-Rhythm with forward Trunk Bending in Normal Subjects without Low Back Pain. European Journal of Orthopaedic Surgery & Traumatology, 24, S193-S199.
 Fasen, J.M., O’Connor, A.M., et al. (2009) A Randomized Controlled Trial of Hamstring Stretching: Comparison of Four Techniques. The Journal of Strength & Conditioning Research, 23, 660-667.
 Halbertsma, J.P., van Bolhuis, A.I. and Göeken, L.N. (1996) Sport Stretching: Effect on Passive Muscle Stiffness of Short Hamstrings. Archives of Physical Medicine and Rehabilitation, 77, 688-692.
 Sjolie, A.N. (2004) Low-Back Pain in Adolescents Is Associated with Poor Hip Mobility and High Body Mass Index. Scandinavian Journal of Medicine & Science in Sports, 14, 168-175.
 Esola, M.A., McClure, P.W., Fitzgerald, G.K. and Siegler, S. (1996) Analysis of Lumbar Spine and Hip Motion during forward Bending in Subjects with and without a History of Low Back Pain. Spine, 21, 71-78.
 Hallman, D.M., Ekman, A.H. and Lyskov, E. (2014) Changes in Physical Activity and Heart Rate Variability in Chronic Neck-Shoulder Pain: Monitoring during Work and Leisure Time. International Archives of Occupational and Environmental Health, 87, 73-744.
 Sawada, T., Matsudaira, K., Muto, Y., Koga, T. and Takahashi, M. (2016) Potential Risk Factors for Onset of Severe Neck and Shoulder Discomfort in Urban Japanese Workers. Industrial Health, 54, 230-236.
 Krantz, G., Forsman, M. and Lundberg, U. (2004) Consistency in Physiological Stress Responses and Electromyographic Activity during Induced Stress Exposure in Women and Men. Integrative Psychological and Behavioral Science, 39, 105-118.