Sports Studies, Moulton College, West Street, Moulton NN3 7RR, UK.
Sport and Exercise Science, University of Northampton Waterside Campus, Northampton NN1 5PH, UK.
Int J Environ Res Public Health. 2021 Mar 12;18(6):2906. doi: 10.3390/ijerph18062906.
This study explored the effects of age and body fat content on responses to whole body cryotherapy (WBC) following a downhill running bout. Forty-one male participants (mean ± SD age 42.0 ± 13.7 years, body mass 75.2 ± 10.8 kg) were allocated into WBC (n = 26) and control (CON, n = 15) groups. WBC participants were divided into old (OLD, ≥45 years, n = 10) and young (YNG, <40 years, n = 13), as well as high fat (HFAT, ≥20%, n = 10) and low fat (LFAT ≤ 15%, n = 8) groups. Participants completed a 30 min downhill run (15% gradient) at 60% VO max. The WBC group underwent cryotherapy (3 min, -120 °C) 1 h post-run and CON participants passively recovered in a controlled environment (20 °C). Maximal isometric leg muscle torque was assessed pre and 24 h post-run. Blood creatine kinase (CK) and muscle soreness were assessed pre, post, one hour and 24 h post-run. Muscle torque significantly decreased in both groups post-downhill run (WBC: 220.6 ± 61.4 Nm vs. 208.3 ± 67.6 Nm, = 0.02; CON: 239.7 ± 51.1 Nm vs. 212.1 ± 46.3 Nm, = 0.00). The mean decrease in WBC was significantly less than in CON ( = 0.04). Soreness and CK increased 24 h post for WBC and CON ( < 0.01) with no difference between groups. Muscle torque significantly decreased in OLD participants ( = 0.04) but not in YNG ( = 0.55). There were no differences between HFAT and LFAT (all values > 0.05). WBC may attenuate muscle damage and benefit muscle strength recovery following eccentrically biased exercises, particularly for young males.
这项研究探讨了年龄和体脂含量对下坡跑后全身冷冻疗法（WBC）反应的影响。41 名男性参与者（平均年龄 ± 标准差为 42.0 ± 13.7 岁，体重 75.2 ± 10.8 公斤）被分为 WBC（n = 26）和对照组（CON，n = 15）。WBC 参与者分为老年（OLD，≥45 岁，n = 10）和年轻（YNG，<40 岁，n = 13），以及高脂肪（HFAT，≥20%，n = 10）和低脂肪（LFAT≤15%，n = 8）组。参与者完成了 30 分钟的下坡跑（15%坡度），速度为 60%VO max。WBC 组在跑步后 1 小时进行冷冻治疗（3 分钟，-120°C），而 CON 组在受控环境（20°C）中被动恢复。在跑步前和跑步后 24 小时评估最大等长腿部肌肉扭矩。在跑步前、后、跑步后 1 小时和 24 小时评估血液肌酸激酶（CK）和肌肉酸痛。两组下坡跑后肌肉扭矩均显著下降（WBC：220.6 ± 61.4 Nm 与 208.3 ± 67.6 Nm，= 0.02；CON：239.7 ± 51.1 Nm 与 212.1 ± 46.3 Nm，= 0.00）。WBC 的平均下降幅度明显小于 CON（= 0.04）。WBC 和 CON 的肌肉酸痛和 CK 在跑步后 24 小时增加（<0.01），两组之间无差异。OLD 参与者的肌肉扭矩明显下降（= 0.04），而 YNG 参与者则没有（= 0.55）。HFAT 和 LFAT 之间没有差异（所有 值>0.05）。WBC 可能会减轻离心运动后肌肉损伤，并有益于肌肉力量恢复，尤其是对于年轻男性。
