There was a trend for lower muscle deoxygenation (as reflected by ΔHHb mean ) in the second bout of exercise after cold water immersion, but it did not reach statistical significance (control: 167 ± 11.4%; treatment: 142 ± 6.42%; P = 0.07; d = 0.89).
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Effects of Cold Water Immersion on Muscle Oxygenation During Repeated Bouts of Fatiguing Exercise: A Randomized Controlled Study.
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showed a trendP = 0.07
Though the half-recovery time for HbO was not significantly different between the 2 groups, the cold water immersion group also showed a trend of improvement ( P = 0.07; d = 0.61) in reoxygenation recovery after the second fatigue protocol (control: Fatigue 1: 36.5 ± 5.73 s, Fatigue 2: 35.8 ± 4.97 s; intervention: Fatigue 1: 36.7 ± 6.20 s, Fatigue 2: 27.9 ± 3.77 s).