If building muscle and strength is your main goal, it is probably best not to cold plunge straight after strength training as a regular habit. Several controlled studies and two meta-analyses suggest that routine cold water immersion immediately after lifting may reduce long-term gains in muscle size and strength. Plunging at other times, or before a competition when short term recovery matters more, is a different question.
This article focuses on long-term training adaptations. If you want to know whether cold water helps soreness and short term recovery, read our separate guide on ice baths for muscle recovery. For the bigger picture on combining heat and cold, see our contrast therapy guide.
Recovery and adaptation are not the same thing
Strength training works by stressing your muscles. In the hours and days after a session, your body responds with signals that, over weeks and months, lead to bigger and stronger muscle fibres. Feeling less sore tomorrow (recovery) is not the same as getting stronger over the next three months (adaptation). Cold water may help with the first while getting in the way of the second.
What the research found
Roberts et al. 2015, The Journal of Physiology
This is the study most people cite. Researchers led by Llion Roberts ran two linked experiments. In the first, 21 physically active men did strength training twice a week for 12 weeks. After each session, one group spent 10 minutes in cold water and the other did 10 minutes of light active recovery on an exercise bike. The active recovery group gained more muscle mass and strength. Only that group showed increases in type II muscle fibre size and in the number of nuclei within each fibre, both of which are linked with muscle growth.
In the second experiment, muscle biopsies showed that cold water immersion dampened some of the cellular signals involved in muscle repair and growth after a single session. The authors suggested that people who use cold water immersion as a routine recovery strategy after strength training should reconsider it.
Fyfe et al. 2019, Journal of Applied Physiology
A later study by Fyfe and colleagues looked at whole-body resistance training. As its title states, post-exercise cold water immersion reduced anabolic signalling and muscle fibre growth, but did not reduce strength gains. This is a useful reminder that the picture is not identical across studies.
Malta et al. 2021, Sports Medicine
This systematic review and meta-analysis pooled eight controlled studies. Regular cold water immersion combined with resistance training showed a negative effect on strength measures such as one repetition maximum and maximal isometric strength, and on ballistic performance such as jumping. In contrast, the authors found no clear effect on endurance training adaptations such as time trial power.
Piñero et al. 2024, European Journal of Sport Science
This meta-analysis, aptly titled "Throwing cold water on muscle growth", also pooled eight studies. It found some evidence that resistance training alone produced more muscle growth than resistance training followed by cold water immersion. The authors rated the quality of the studies as fair to poor and urged caution, but concluded that cold water immersion immediately after lifting may blunt hypertrophy.
What this means in practice
The evidence is not perfect. The studies are small, mostly in young men, and the protocols vary. But the direction is fairly consistent: if muscle size and strength are your priorities, plunging straight after most lifting sessions may cost you some progress. Nobody has established a safe gap between lifting and plunging, so the practical advice below leans cautious.
| Your main goal | A cautious approach |
|---|---|
| Building muscle and strength | Avoid plunging straight after lifting. Plunge on rest days or keep it well away from strength sessions. |
| Endurance (running, cycling) | Evidence so far suggests less concern. Plunge after sessions if you enjoy it. |
| Competing again soon (tournaments, two sessions a day) | Short term recovery may matter more than long-term adaptation. Some athletes use cold water strategically here. |
| General wellbeing | Plunge at a time that suits your routine, such as mornings or non-training days. |
Practical timing ideas
- Plunge on rest days. This is the simplest way to avoid any overlap with strength sessions.
- Separate by time of day. If you lift in the evening, a morning plunge keeps the two far apart. Our guide to morning or evening plunging covers the trade-offs.
- Plunge before training rather than after, if that fits your routine. Allow time to rewarm properly before lifting heavy weights.
- Use it strategically. In a heavy competition week, when recovering for the next match matters more than building muscle, the trade-off may be worth it.
- Try active recovery after lifting. In the Roberts study, 10 minutes of easy cycling was the comparison group, and it did better for long-term gains.
What about saunas after training?
The research above is about cold water. There is far less research on how post-training sauna use affects strength adaptations, so we will not make claims either way. If you lift and then use a sauna, keep sessions moderate, rehydrate, and get out if you feel lightheaded. Our sauna and cold plunge routine guide explains how to structure a combined session.
Choosing a plunge that fits your training
If you want to plunge on rest days and mornings, the main thing is having cold water ready when you are. A plunge with its own chiller holds a set temperature so you do not need bags of ice. The ThermoX Pro pairs a 700L tub with an external chiller and runs from 3 to 40°C, so the same tub can be used cold or warm.
Safety first
Cold water is a real stress on the body. The RNLI warns that cold water shock, an involuntary gasp and rapid breathing, can happen in any water below 15°C. The British Heart Foundation notes that colder water makes the heart work harder.
- Speak to your GP first if you have a heart condition, high or low blood pressure, are pregnant, or have other medical conditions.
- Never plunge alone or after alcohol.
- Start warmer and shorter, around 12 to 15°C for 30 to 60 seconds, and build up gradually. Our 4-week starter plan shows one way to do it.
- Do not plunge while dizzy or exhausted after a hard session.
Frequently asked questions
Does cold plunging after lifting kill your gains?
Not entirely, but research including Roberts et al. 2015 and meta-analyses in 2021 and 2024 suggests regular cold water immersion straight after strength training may reduce long-term gains in muscle size and strength.
How long should I wait after lifting to cold plunge?
No study has established a safe gap. A cautious approach is to plunge on rest days or at a different time of day from your strength sessions.
Is it fine to cold plunge after running or cycling?
A 2021 meta-analysis in Sports Medicine found no clear negative effect of regular cold water immersion on endurance training adaptations, though the evidence base is small.
Can I cold plunge before a workout instead?
Yes, if it suits you. Allow time to rewarm and warm up properly before lifting, as cold muscles may feel stiff and less ready for heavy work.