CrossFit Recovery: Sauna, Cold Plunge, Red Light, and Training Recovery

Why does CrossFit recovery depend on the workout?

CrossFit workouts mix weightlifting, gymnastics, and conditioning, and a 68-paper scoping review found that physical and physiological markers differ between the workouts studied. It concluded that 48 to 72 hours are needed to recover from a CrossFit challenge.¹ A 2026 systematic review of 19 studies (537 participants) found that regular CrossFit training improved maximal oxygen uptake, strength, hypertrophy, and muscular endurance while also inducing physiological stress.⁷ What recovery needs to protect changes with the day.

In 14 male CrossFit practitioners, jump height, handgrip strength, and perceived recovery all fell 24 hours after a strength-power-emphasized training microcycle and were back to baseline within 48 hours.² That's one group of men and one kind of training block. A conditioning-heavy week could behave differently, and the study didn't test it.

What has been tested in CrossFit athletes?

Thirty CrossFit athletes were recruited for a cold-versus-massage trial after the Murph workout, which is a 1-mile run, 100 pull-ups, 200 push-ups, 300 air squats, and another mile, typically in a weighted vest. Only 18 completed the evaluations. Afterward they received either 20 minutes of massage or 20 minutes of cold-water immersion at 8°C. The authors report less pain in the cold group, with no pain reported at 48 hours. The trial had no rest-only group and wasn't blinded, so it can't show that cold beats doing nothing.³ Eight degrees for 20 minutes is also colder and longer than the 11 to 15°C, 11 to 15 minute range that performed best in one meta-analysis.⁸

In a 2026 crossover trial, 12 male CrossFit athletes tried four post-workout interventions in separate weeks: passive recovery, pneumatic compression, shock wave therapy, and photobiomodulation (red and near-infrared light, 633 to 905 nm) combined with a static magnetic field. The primary outcome, jump height at 1 hour, didn't differ between interventions. At 24 and 48 hours, the light-plus-magnet device beat passive recovery on jump height and several muscle damage and oxidative stress markers.⁴ Only outcome assessors were blinded, and the magnetic field means the results can't be credited to light alone.

Cold plunge: strength days versus conditioning days

Our cold plunge benefits guide covers the general evidence. In short, cold gives modest, low-certainty soreness relief, no meaningful strength benefit, and a brief dip in immediate jump performance.⁹ The adaptation evidence is what matters for a CrossFit week. Regular cold immersion worsened resistance-training strength outcomes (standardized mean difference -0.60) and didn't change aerobic performance changes.⁵ A 2026 network meta-analysis ranked passive recovery best for strength after resistance training, with moderate certainty.¹⁰ A narrative review draws the practical line: cold when fast recovery between sessions matters most, and not after resistance training when muscle growth is the main goal.¹¹

On a strength-dominant day inside a strength or muscle-building block, then, the evidence offers no benefit worth the possible cost. After a conditioning-dominant day, cold is a reasonable option for soreness, with the caveat that its benefit is modest and its certainty low. Both statements are inferences from other athletes, apart from the one weak Murph trial.

Sauna: no CrossFit trials

We found no trial of sauna for recovery in CrossFit athletes. The nearest evidence is a 6-week study in which 40 female team-sport athletes used a 10-minute, 50°C infrared sauna after training three times a week and gained muscle at the same rate as controls.⁶ A sauna is a reasonable heat and relaxation habit that doesn't appear to interfere with muscle growth. No study shows that it speeds recovery from workouts. See sauna benefits for the general research.

Red light: one mixed trial and a weak aggregate

The CrossFit trial above is the only direct evidence, and it can't separate light from the magnetic field.⁴ More broadly, a systematic review of photobiomodulation in healthy people found some effect on time to exhaustion, repetitions, and peak torque, with very low to moderate quality of evidence.¹² A review of whole-body photobiomodulation found no performance benefit in five studies.¹³ Our red light therapy benefits guide covers the uses with better trial support.

How to decide between them

Building a home recovery setup for CrossFit training

The evidence doesn't rank these three for CrossFit, so this section separates two questions: what's been shown to help in this sport, and what's a reasonable practical option.

Space, electrical capacity, budget, and realistic use should drive the choice. The planner turns those constraints into a rules-based starting list, compare puts specs side by side, and you can browse complete builds, saunas, cold plunges, and red light panels. Equipment doesn't replace sleep and sensible programming.