Chen Trevor C, Huang Yuh-Chuan, Chou Tai-Ying, Hsu Sheng-Tsung, Chen Mei-Yen, Nosaka Kazunori
Department of Physical Education and Sport Sciences, National Taiwan Normal University, Taipei City, Taiwan.
Physical Education Office, Ming Chuan University, Taipei City, Taiwan.
Eur J Sport Sci. 2023 Aug;23(8):1638-1646. doi: 10.1080/17461391.2023.2185163. Epub 2023 Mar 15.
The present study investigated the effects of a far-infrared radiation (FIR) lamp therapy on changes in muscle damage and proprioception markers after maximal eccentric exercise of the elbow flexors (EF: Study 1) and the knee flexors (KF: Study 2) in comparison to a sham treatment condition. In each study, 24 healthy sedentary women were assigned to a FIR or a sham treatment group ( = 12/group). They performed 72 maximal EF eccentric contractions (Study 1) or 100 maximal KF eccentric contractions (Study 2) with their non-dominant limbs. They received a 30-min FIR (wavelength: 8-14 µm) or sham treatment at 1, 25, 49, 73 and 97 h post-exercise to the exercised muscles. Maximum voluntary isometric contraction (MVC) torque, muscle soreness, plasma creatine kinase activity, and proprioception assessed by position sense, joint reaction angle, and force match were measured before, and 0.5, 24, 48, 72, 96 and 120 h post-exercise. The outcome measures showed significant changes ( < 0.05) at 0.5-hour post-exercise (before treatment) similarly ( > 0.05) between the conditions in both studies. However, changes in all measures at 24-120 h post-exercise were smaller ( < 0.05) for the FIR than sham condition in both studies. For example, MVC torque returned to the baseline by 72 h post-exercise for the FIR condition in both studies, but was still 19 ± 6% (Study 1) or 17 ± 12% (Study 2) lower than the baseline at 120 h post-exercise for the sham condition. These results suggested that the FIR lamp therapy was effective for accelerating recovery from muscle damage.
本研究调查了远红外辐射（FIR）灯疗法对肘部屈肌（EF：研究1）和膝部屈肌（KF：研究2）进行最大离心运动后肌肉损伤和本体感觉标志物变化的影响，并与假治疗条件进行比较。在每项研究中，24名久坐不动的健康女性被分配到FIR或假治疗组（每组 = 12人）。她们用非优势肢体进行72次最大EF离心收缩（研究1）或100次最大KF离心收缩（研究2）。在运动后1、25、49、73和97小时，对运动的肌肉进行30分钟的FIR（波长：8 - 14微米）或假治疗。在运动前以及运动后0.5、24、48、72、96和120小时测量最大自主等长收缩（MVC）扭矩、肌肉酸痛、血浆肌酸激酶活性以及通过位置觉、关节反应角度和力匹配评估的本体感觉。结果测量显示，在两项研究中，运动后0.5小时（治疗前）各条件下均有显著变化（<0.05），且差异相似（>0.05）。然而，在两项研究中，运动后24 - 120小时，FIR组所有测量指标的变化均小于假治疗组（<0.05）。例如，在两项研究中，FIR组运动后72小时MVC扭矩恢复到基线水平，但在运动后120小时，假治疗组仍比基线水平低19±6%（研究1）或17±12%（研究2）。这些结果表明，FIR灯疗法对加速肌肉损伤的恢复有效。
