Recovery is where training turns into progress. You lift, run or ride, and your body adapts in the hours and days that follow. Magnesium shows up in almost every part of that process, which is why it has become a staple for so many active people.
Here is what magnesium does in muscle, what studies link it to, and how to make it part of a recovery routine.
What magnesium does in your muscles
Magnesium is the fourth most abundant mineral in the body and is involved in more than 300 metabolic reactions. It helps maintain normal nerve and muscle function and plays a central role in energy production and storage (Volpe, 2015).
In muscle, magnesium helps maintain normal contraction and relaxation (Zhang et al., 2017), and its role in energy production and storage puts it right at the center of how you fuel every rep (Volpe, 2015).
What the research links magnesium to
A 2017 review in Nutrients pulled together animal and human studies on magnesium and exercise (Zhang et al., 2017). Several cross-sectional surveys found that better magnesium status was linked to better muscle performance, including grip strength, lower-leg power, knee extension torque and jumping performance. Some intervention studies linked magnesium supplementation to improvements in functional measures such as quadriceps torque, and in older women to better gait speed and chair-stand times.
The review is careful to note that much of the research is small and mixed, and that benefits are most likely in people whose magnesium intake or status is low. That's an important point for athletes, because the same review notes that active people may have higher magnesium requirements to maintain optimal exercise performance than their inactive peers (Zhang et al., 2017).
Sleep: the recovery multiplier
If there's one recovery tool every athlete agrees on, it's sleep. A review in Sports Medicine summarized how sleep loss is linked to poorer exercise performance and slower, less accurate cognitive performance (Fullagar et al., 2015).
This is where magnesium's sleep research becomes a recovery story. In a 2025 placebo-controlled trial of 155 adults who reported poor sleep, magnesium bisglycinate was linked to a modest improvement in sleep scores after four weeks (Schuster et al., 2025). In the CARDIA study of nearly 4,000 US adults, the highest magnesium intakes were linked to a lower likelihood of short sleep (Zhang et al., 2021). Better nights, better training days.
We go deeper on this in Magnesium for Sleep.
Food first
Before reaching for a supplement, it helps to build magnesium into your recovery meals. Pumpkin seeds, almonds, cashews, spinach, black beans, quinoa and dark chocolate are all good sources. NIH's Office of Dietary Supplements notes that many people in the US get less magnesium from food than recommended (NIH ODS), and active people burning through more may be the ones who feel it most.
A post-training bowl of quinoa, black beans and greens with a handful of pumpkin seeds is a genuinely magnesium-rich meal.
How active people use magnesium
Most people take magnesium in the evening, after training and with dinner or before bed, so it lines up with sleep, the part of recovery it's most clearly linked to. Glycinate is a popular evening choice, and it's the form used in the 2025 sleep trial. We cover timing in detail in our guide on the best time to take magnesium.
Magnesium pairs naturally with other well-studied recovery habits: enough total protein, consistent sleep, and training that progresses gradually. If you also take creatine, there's no conflict; many athletes take both, and creatine has its own strong evidence base for strength and lean mass, explained in Creatine for Your Brain.
Common questions
Does magnesium help with post-workout soreness? That's one of the most common reasons people try it. What the research supports most clearly is magnesium's role in normal muscle function and its links to sleep, both of which matter for how you feel the next day.
Should I take magnesium before or after a workout? Most people take it in the evening because of its links to sleep. There's no strong evidence that taking it right before or right after training changes much.
Do athletes need more magnesium? Possibly. A 2017 review notes that active people may have higher magnesium requirements than their inactive peers (Zhang et al., 2017). For most active people, that's a good reason to focus on magnesium-rich foods first and to consider a supplement if the diet falls short.
Is there an upper limit? Yes. NIH's Office of Dietary Supplements sets the upper limit for magnesium from supplements at 350 mg a day for adults; magnesium from food doesn't count toward that number (NIH ODS).
Which form is best for recovery? There isn't a head-to-head trial on recovery. Glycinate is a popular evening form, and it's the form used in the 2025 sleep trial. Our older guide, Which Magnesium is Best for Sleep and Anxiety, compares glycinate and citrate.
The bottom line
Magnesium is involved in muscle contraction and relaxation, energy production and sleep, three foundations of recovery. Studies link better magnesium status to better muscle performance and link magnesium supplementation to modestly better sleep, with the clearest benefits for people who don't get enough from food.
Our Magnesium Glycinate is an easy evening addition to a recovery routine.
References
- Volpe, 2015: doi.org/10.1249/JSR.0000000000000178
- Zhang et al., 2017: doi.org/10.3390/nu9090946
- Fullagar et al., 2015: doi.org/10.1007/s40279-014-0260-0
- Schuster et al., 2025: doi.org/10.2147/NSS.S524348
- Zhang et al., 2021: doi.org/10.1093/sleep/zsab276
- NIH ODS: ods.od.nih.gov/factsheets/Magnesium-HealthProfessional/
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
