The Cold Water Immersion After Exercise

Abstract

Cold-water immersion (CWI) is widely used after exercise to accelerate recovery, reduce muscle soreness and restore performance. However, the same physiological responses that may facilitate short-term recovery can potentially interfere with molecular processes responsible for long-term training adaptation. This review critically evaluates the acute benefits, physiological mechanisms, methodological limitations and chronic effects of post-exercise CWI, with particular emphasis on the distinction between resistance- and endurance-training adaptations. A structured narrative review of human experimental studies, randomized and crossover trials, longitudinal training interventions, systematic reviews and meta-analyses available up to September 2026 was performed. Particular attention was given to muscle soreness, neuromuscular performance, biomarkers of muscle damage, hemodynamic and thermal responses, muscle protein synthesis, hypertrophy, strength and endurance adaptations. CWI can reduce perceived muscle soreness and improve perceived recovery, with selected benefits for next-day muscular power. Immediate explosive performance may transiently deteriorate. Regular CWI following resistance training can attenuate muscle protein synthesis, anabolic signaling and hypertrophy and may modestly reduce strength gains. In contrast, endurance adaptations appear largely preserved, although enhanced molecular signaling does not consistently translate into superior performance. CWI should be periodized according to the athlete’s primary goal. Its greatest value is during congested competition schedules, high thermal strain and situations in which rapid recovery is more important than maximizing adaptive signaling.