Sports
Do Ice Baths Work? What Science Says About Cryotherapy
Rafael Tambascia explains the impact of ice on post-workout recovery, the lack of evidence for contrast therapy, and the risks for muscle hypertrophy.
Cold-water immersion has become a major trend among athletes, but its physiological effects warrant caution. Learn when cryotherapy is beneficial and why it should be avoided after strength training.
Cold water immersion and the popular ice bath have become post-workout staples for many elite athletes and endurance enthusiasts. However, the scientific evidence behind the technique reveals important nuances regarding when the practice truly helps and when it might hinder the body's adaptations. At Stemma Performance, led by Bruna Mahn, physical therapist Rafael Tambascia broke down what science confirms about cryotherapy and contrast therapy.
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Subjective perception versus fatigue markers
Laboratory studies evaluating biological markers indicate that ice baths do not produce a significant reduction in fatigue byproducts to purely physiologically ensure accelerated next-day recovery. The primary difference observed in scientific literature lies in perception: athletes exposed to ice report a clear, consistent subjective improvement in muscle soreness and fatigue.
For long-duration endurance training and endurance sports, post-event or post-workout cryotherapy does not compromise performance or hinder cardiovascular adaptations. Athletes who feel relief from the method can use it without restriction in this context.
The risk of cryotherapy in hypertrophy training
The main warning applies to strength and resistance training aimed at hypertrophy. The goal of strength work is to generate micro-tears and trigger a controlled inflammatory process—an essential mechanism for cellular signaling and repair that makes muscle fibers stronger and more resilient.
When an ice bath is used immediately after strength training, the sudden drop in temperature slows local metabolism and dampens the necessary inflammatory response, compromising gains in muscle mass and strength. This is a well-established contraindication in scientific literature.
Contrast therapy, heat, and active recovery
While popular in training centers, alternating between hot and cold water (thermal contrast) lacks backing in scientific literature. According to Tambascia, there is no solid evidence that immediate contrast therapy provides superior benefits compared to either method applied on its own.
For athletes who dislike extreme cold, heat offers an equally effective recovery pathway. Modalities such as saunas, hot tubs, and whirlpool baths promote muscle relaxation and increase local blood flow. Alongside these, active recovery—such as an easy spin on a stationary bike after an exhausting event—remains one of the most efficient strategies for helping clear fatigue.
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