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Int J Sports Physiol Perform. 2018 May 1;13(5):584-589. doi: 10.1123/ijspp.2017-0334. Epub 2018 May 23.

Cryotherapy Reinvented: Application of Phase Change Material for Recovery in Elite Soccer.

Abstract

PURPOSE:

To examine whether donning lower-body garments fitted with cooled phase change material (PCM) would enhance recovery after a soccer match.

METHODS:

In a randomized, crossover design, 11 elite soccer players from the reserve squad of a team in the second-highest league in England wore PCM cooled to 15°C (PCMcold) or left at ambient temperature (PCMamb; sham control) for 3 h after a soccer match. To assess recovery, countermovement jump height, maximal isometric voluntary contraction (MIVC), muscle soreness, and the adapted Brief Assessment of Mood Questionnaire (BAM+) were measured before 12, 36, and 60 h after each match. A belief questionnaire was completed preintervention and postintervention to determine the perceived effectiveness of each garment.

RESULTS:

Results are comparisons between the 2 conditions at each time point postmatch. MIVC at 36 h postmatch was greater with PCMcold versus PCMwarm (P = .01; ES = 1.59; 95% CI, 3.9-17.1%). MIVC also tended to be higher at 60 h postmatch (P = .05; ES = 0.85; 95% CI, -0.4% to 11.1%). Muscle soreness was 26.5% lower in PCMcold versus PCMwarm at 36 h (P = .02; ES = 1.7; 95% CI, -50.4 to -16.1 mm) and 24.3% lower at 60 h (P = .04; ES = 1.1; 95% CI, -26.9 to -0.874 mm). There were no between-conditions differences in postmatch countermovement jump height or BAM+ (P > .05). The belief questionnaire revealed that players felt the PCMcold was more effective than the PCMamb after the intervention (P = .004).

CONCLUSIONS:

PCM cooling garments provide a practical means of delivering prolonged postexercise cooling and thereby accelerate recovery in elite soccer players.

KEYWORDS:

exercise; muscle damage; muscle soreness; strength

PMID:
28872368
DOI:
10.1123/ijspp.2017-0334
[Indexed for MEDLINE]

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