Long-Term Effects of the Regular Post-Exercise Cold Application on Trained Muscle Adaptations Using Different Cooling Temperatures
【Supercategory：7. DESCENTE SPORTS SCIENCE Subcategory：7.39 Vol.39】
ABSTRACT
Cold application is an established component in the treatment by rest, ice, compression, elevation (RICE) for acute sports injuries. Recently, this has been one of the recovery techniques commonly used by some athletes for post-exercise recovery. However, the regular post-exercise cold application to the uninjured tissue may diminish the improvement in physical performance induced by a long-term training. The long-term effects of regular cold application using different temperatures have not yet been investigated. The aim of this study was to examine the effects of two strategies of regular post-exercise cold application on muscular and vascular adaptations using different temperatures. Subjects include eighteen male and eleven female participated in resistance training: 5 sets of 8 wrist-flexion exercises at workload of 8 RM (Repetition Maximum), 3 times a week for 6 weeks. They were randomized to one of three groups. Ten subjects(10℃ cooled group) and nine subjects (20℃ cooled group) applied the cold pack maintained at a constant temperature of around 10℃ and 20℃, respectively, over the experimental forearms for 20 min after wrist-flexion exercises. The other served as controls (non-cooled group). Measurements were before and after the training period; maximal muscle strength, wrist-flexor thickness, local muscle endurance, brachial-artery diameter and %FMD (flow-mediated dilation) were measured in the upper extremities. Maximal muscle strength of the experimental arms significantly increased after training in the non-cooled group (p<0.01) and the 20℃cooled group (p<0.01), but did not in the 10℃ cooled group. Wrist-flexor thicknesses tended to increase slightly after training in all groups, but this was not different between groups. Local muscle endurance, brachial-artery diameter and %FMD did not increase after training in all groups. These results suggest that post-exercise mild cold application to uninjured muscles might attenuate deleterious effects on trained muscle adaptations.
DESCENTE SPORTS SCIENCE Vol.39/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE
Cold application is an established component in the treatment by rest, ice, compression, elevation (RICE) for acute sports injuries. Recently, this has been one of the recovery techniques commonly used by some athletes for post-exercise recovery. However, the regular post-exercise cold application to the uninjured tissue may diminish the improvement in physical performance induced by a long-term training. The long-term effects of regular cold application using different temperatures have not yet been investigated. The aim of this study was to examine the effects of two strategies of regular post-exercise cold application on muscular and vascular adaptations using different temperatures. Subjects include eighteen male and eleven female participated in resistance training: 5 sets of 8 wrist-flexion exercises at workload of 8 RM (Repetition Maximum), 3 times a week for 6 weeks. They were randomized to one of three groups. Ten subjects(10℃ cooled group) and nine subjects (20℃ cooled group) applied the cold pack maintained at a constant temperature of around 10℃ and 20℃, respectively, over the experimental forearms for 20 min after wrist-flexion exercises. The other served as controls (non-cooled group). Measurements were before and after the training period; maximal muscle strength, wrist-flexor thickness, local muscle endurance, brachial-artery diameter and %FMD (flow-mediated dilation) were measured in the upper extremities. Maximal muscle strength of the experimental arms significantly increased after training in the non-cooled group (p<0.01) and the 20℃cooled group (p<0.01), but did not in the 10℃ cooled group. Wrist-flexor thicknesses tended to increase slightly after training in all groups, but this was not different between groups. Local muscle endurance, brachial-artery diameter and %FMD did not increase after training in all groups. These results suggest that post-exercise mild cold application to uninjured muscles might attenuate deleterious effects on trained muscle adaptations.
DESCENTE SPORTS SCIENCE Vol.39/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE
| Researcher | Motoi Yamane*1, Takeru Kato*2, Norikazu Ohnishi*3 |
|---|---|
| University or institution | *1 Department of Human Sciences, Aichi Mizuho College, *2 School of Health Sciences, Asahi University, *3 Faculty of Nursing, Mie Prefectural College of Nursing |
Keywords
cold application, cryotherapy, resistance training, muscle strength, muscle hypetrophy