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The effect of Liquid ice after high-intensity exercise on muscle function compared to Block ice
Natsuki Matsumura1, Shohei Nagashima1, Kaho Negoro1
1Human Health Science, Graduate School of Medicine, Kyoto University, Japan.
Journal of Exercise Science and Fitness
|January 3, 2022
Summary
Liquid ice (LI) cryotherapy may be more effective than block ice (BI) for reducing muscle stiffness after exercise. LI showed a significantly lower rate of change in passive stiffness over 48 hours compared to BI.
Area of Science:
- Sports Medicine
- Physiology
Background:
- Cryotherapy is utilized for muscle damage recovery post-exercise and acute sports injury treatment.
- Liquid ice (LI) is hypothesized to be more effective than block ice (BI) due to its prolonged cold retention.
Observation:
- This study investigated the effects of LI versus BI on passive stiffness (PS), a measure of muscle function.
- A case series involving 22 healthy men compared the efficacy of LI and BI cryotherapy on leg muscle PS.
Findings:
- The rate of change in passive stiffness from pre-exercise to 48 hours post-cryotherapy was significantly lower in the LI group compared to the BI group (p=0.03).
- No significant differences were found between LI and BI for other measured parameters of passive stiffness.
Implications:
- These findings suggest a potential difference in the effectiveness of LI and BI cryotherapy for managing post-exercise muscle stiffness.
- Results may inform the selection of cryotherapy interventions for athletes and in sports settings to mitigate muscle stiffness.
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