Muanjai Pornpimol, Jones David A, Mickevicius Mantas, Satkunskiene Danguole, Snieckus Audrius, Skurvydas Albertas, Kamandulis Sigitas
Institute of Sport Science and Innovations, Lithuanian Sports University, Sporto 6, 44221, Kaunas, Lithuania.
School of Healthcare Science, Manchester Metropolitan University, Manchester, England, UK.
Eur J Appl Physiol. 2017 Jun;117(6):1217-1226. doi: 10.1007/s00421-017-3608-y. Epub 2017 Apr 8.
This study evaluated the acute effects of two different stretch intensities on muscle damage and extensibility.
Twenty-two physically active women (age 20 ± 1.0 years) were divided into two matched groups and undertook eight sets of 30-s passive hamstring stretching. One group stretched to the point of discomfort (POD) and the other to the point of pain (POP). Hamstring passive torque, sit and reach (S&R), straight leg raise (SLR), and markers of muscle damage were measured before, immediately after stretching and 24 h later.
S&R acutely increased and was still increased at 24 h with median (interquartile range) of 2.0 cm (0.5-3.75 cm) and 2.0 cm (0.25-3.0 cm) for POP and POD (p < 0.05), respectively, with no difference between groups; similar changes were seen with SLR. Passive stiffness fully recovered by 24 h and there was no torque deficit. A small, but significant increase in muscle tenderness occurred at 24 h in both groups and there was a very small increase in thigh circumference in both groups which persisted at 24 h in POP. Plasma CK activity was not raised at 24 h.
Stretching to the point of pain had no acute advantages over stretching to the discomfort point. Both forms of stretching resulted in very mild muscle tenderness but with no evidence of muscle damage. The increased ROM was not associated with changes in passive stiffness of the muscle but most likely resulted from increased tolerance of the discomfort.
本研究评估了两种不同拉伸强度对肌肉损伤和伸展性的急性影响。
22名身体活跃的女性（年龄20±1.0岁）被分为两个匹配组，进行八组30秒的被动腘绳肌拉伸。一组拉伸至不适点（POD），另一组拉伸至疼痛点（POP）。在拉伸前、拉伸后立即以及24小时后测量腘绳肌被动扭矩、坐立前屈（S&R）、直腿抬高（SLR）和肌肉损伤标志物。
S&R急性增加，并且在24小时时仍保持增加，POP组和POD组的中位数（四分位间距）分别为2.0厘米（0.5 - 3.75厘米）和2.0厘米（0.25 - 3.0厘米）（p < 0.05），两组之间无差异；SLR也有类似变化。被动僵硬度在24小时时完全恢复，且无扭矩 deficit。两组在24小时时肌肉压痛均有小幅但显著增加，两组大腿围均有非常小的增加，POP组在24小时时仍持续存在。24小时时血浆肌酸激酶活性未升高。
拉伸至疼痛点相较于拉伸至不适点并无急性优势。两种拉伸形式均导致非常轻微的肌肉压痛，但无肌肉损伤证据。ROM增加与肌肉被动僵硬度变化无关，最可能是由于对不适的耐受性增加所致。
