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Case Reports
. 2022 Jan;20(1):23-26.
doi: 10.1016/j.jesf.2021.12.001. Epub 2021 Dec 4.

The effect of Liquid ice after high-intensity exercise on muscle function compared to Block ice

Natsuki Matsumura  1 , Shohei Nagashima  1 , Kaho Negoro  1 , Yoshiki Motomura  1 , Kanako Shimoura  1 , Hiroshige Tateuchi  1 , Noriaki Ichihashi  1 , Tomoki Aoyama  1 , Momoko Nagai-Tanima  1
Affiliations
Case Reports

The effect of Liquid ice after high-intensity exercise on muscle function compared to Block ice

Natsuki Matsumura et al. J Exerc Sci Fit. 2022 Jan.

Abstract

Cryotherapy is used to recover muscle damage after exercise and to treat acute sports injuries. Liquid ice (LI) can keep cold for a long time, and is assumed more effective than block ice (BI). From this, the aim of this study was to investigate the effects of LI on the change of passive stiffness (PS) as muscle function and to validate the effectiveness of LI compared to BI. We performed the experiment as part of a case series of verification of the effects of cryotherapy. 22 healthy men (target area: right leg) were randomized to two groups: LI group and BI group. PS was measured three times during experiment protocol, pre: before exercise; post; after treating each cryotherapy after exercise; 48h: 48 hours after pre. Statistical analysis compared the PS, the amount of change in PS, and the rate of change in PS between the two groups. The rate of change between pre and 48h in LI was significantly lower compared to that in BI (p = 0.03). There was no significant difference regarding other results between groups. It revealed that the difference of effect between LI and BI for PS of muscles after high-intensity exercises. These results could be helpful for the choice of intervention for reducing muscle stiffness after exercise and at sports field.

Keywords: Cryotherapy; Exercise; Muscle; Sport.

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Conflict of interest statement

The authors have no conflicts of interest relevant to this article.

Figures

Fig. 1
Fig. 1
Liquid ice can be seen on the left side and block ice on the right.
Fig. 2
Fig. 2
Experimental protocol and measurement time points.
See this image and copyright information in PMC

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