Hydrogen Water and Exercise Recovery: What the Studies Show

Hydrogen Studies is funded by Echo Technologies LLC, which sells hydrogen water products. Echo doesn't decide which studies we cover or how we describe them — see our editorial policy.

Evidence at a glance: Low. A handful of small, short human trials found less muscle soreness or lower muscle-damage markers after hard exercise with hydrogen, but other trials found no difference. The recovery trials had 6 to 27 participants, and none lasted longer than six weeks.

This page is about recovery: how muscles feel, and what blood markers show, in the hours and days after hard exercise. For speed, endurance and strength during exercise, see hydrogen for athletic performance.

What human trials found

Most recovery trials were crossover studies, in which the same people tried hydrogen and a look-alike placebo on different occasions.

Drinking hydrogen water

• In 12 young men doing a leg workout, drinking 1,260 mL of hydrogen-rich water before, during and after the session lowered blood lactate during exercise. Soreness 24 hours later was 26 versus 41 on a 100-point scale [3].
• In 12 elite fin swimmers doing two hard sessions in one day, four days of hydrogen water was followed 12 hours later by lower creatine kinase (a blood marker of muscle damage), slightly less soreness and slightly higher jumps [4].
• In 18 trained men, eight days of hydrogen water (about 1.9 L a day) let them complete more squat repetitions, but soreness, jump height and perceived recovery at 24 and 48 hours didn't differ from placebo [5].
• In 27 previously untrained adults over 50 starting resistance training, six weeks of hydrogen water (12 mg of hydrogen per serving, twice a day) lowered blood markers of muscle damage more than placebo water. Strength improved in both groups, and sleep quality tended to improve more with hydrogen, but not significantly [9].

Hydrogen baths

• Six young men who soaked for 30 minutes in a hydrogen-rich bath (about 8 mg per liter) right after damaging leg exercise had no rise in creatine kinase at 24 hours and reported less soreness than after a plain bath [6].
• In nine men, daily 20-minute hydrogen baths for a week after downhill running had no effect on soreness, muscle damage or inflammation [7].

Inhaled hydrogen

• Eight men who breathed hydrogen-enriched air (up to about 4% hydrogen) through a nasal tube for an hour after exercise lost less jump height and had less of a urine marker of DNA oxidation. Blood markers of muscle damage and oxidative stress didn't differ [8].

Pooled results. A 2024 meta-analysis of six studies (76 people) found hydrogen didn't lower a standard blood marker of oxidative stress after exercise, though antioxidant capacity rose slightly [2]. Another pooled 27 publications (597 healthy adults): exercise felt slightly easier and blood lactate was slightly lower, but endurance and strength didn't improve [1]. We found no meta-analysis pooling soreness or creatine kinase.

What animal studies suggest (not human evidence)

Rats that inhaled hydrogen while running to exhaustion had lower muscle markers of oxidative stress, inflammation and cell death [10]. Mice that drank hydrogen water for four weeks or more ran farther and had fewer signs of muscle damage [11]. These point to possible mechanisms; they don't show the same happens in people.

Doses and durations studied

• Drinking: 0.5 to 5.9 ppm in the pooled trials [1]; about 1.3 to 2.5 L on test days [3][4]; from one day to six weeks.
• Bathing: one 30-minute bath [6] to a week of daily 20-minute baths [7].
• Inhaling: 1% to 68% hydrogen across trials [1]; one hour after exercise in the recovery trial [8].

No standard dose exists, and no trial compared doses or timing.

What we don't know

• Whether the effect matters. Soreness differences were about 8 to 15 points on a 100-point scale [3][4].
• Who it applies to. Most participants were young or middle-aged men [1].
• Longer use. Most trials lasted 1 to 14 days [1]; the longest recovery trial lasted six weeks [9].
• Sleep between sessions. Only one trial measured sleep, without a significant difference [9].
• Independent replication. All five positive trials above come from two university labs (Olomouc, Czechia and Novi Sad, Serbia) or list company-affiliated authors [3][4][6][8][9].
• Larger trials. A double-blind trial of hydrogen water and 72-hour recovery in junior footballers has published its protocol; results weren't available when we reviewed this page [12].