Recovery is not optional: 5 things we make our members do

Cold water immersion has gone from a fringe practice used by elite athletes to something you see in every upscale gym and wellness brand. With that growth has come a significant amount of noise, both overclaiming and dismissal. Here is where the evidence actually sits as of 2025.

What the research shows

The clearest, most consistent finding in the cold exposure literature is this: cold water immersion reduces delayed onset muscle soreness (DOMS) and perceived fatigue in the 24 to 48 hours following exercise. The effect is real and reproducible. If you train frequently and recovery between sessions matters to your performance, this is a legitimate reason to use cold immersion.

There is also reasonable evidence that cold exposure activates the sympathetic nervous system and produces a stress response that, repeated regularly, may improve psychological resilience and stress tolerance. The mechanism is plausible, controlled acute stress of this kind, and the reported benefits are consistent enough that most researchers take the effect seriously even if the mechanisms are not fully understood.

What is probably not true

Claims about cold immersion converting white adipose tissue to metabolically active brown fat in quantities that affect body composition are not well-supported in humans at the temperatures and durations involved in most commercial cold plunge protocols. The animal studies that support this idea involve much longer and colder exposure than most people achieve or sustain.

Similarly, claims about immune system enhancement are not well-established in healthy people who train regularly. The immune system effects that do appear in the literature are largely explained by the stress response described above.

The timing question

There is a legitimate debate about whether cold immersion after strength training blunts hypertrophic adaptation by reducing the inflammatory signalling that drives muscle growth. The evidence on this is mixed but worth taking seriously. Our recommendation at Bade Fitness is not to use the cold plunge immediately after a strength session you want to maximise hypertrophy from. Use it after conditioning work, on rest days, or on strength days where you prioritise recovery over growth stimulus.

Practical guidance

Protocol: 11 minutes per week total, divided as you prefer, one 11-minute session or multiple shorter ones. Temperature: 10 to 15°C produces most of the documented benefits. Below 5°C is not substantially more effective and increases risk without proportionate return.

Our cold plunge at Bade Fitness runs at 2.5 to 4°C. For most members we recommend two to three minutes at that temperature rather than longer exposure. The session counts. The suffering is optional.