Creatine shields muscle mass even without exercise

As people get older, they tend to lose muscle mass while accumulating fat tissue. This pattern, known as sarcopenic obesity, raises the risk of limited mobility and metabolic problems. Losing weight seems like the obvious fix, but caloric restriction can reduce muscle mass further. That makes weight management in later life genuinely tricky.

Creatine is a compound that helps cells regenerate ATP, the energy molecule muscles rely on during physical activity. Earlier research had already hinted at benefits for brain function and muscle strength. Now, a team from Texas A&M University investigated what creatine monohydrate supplementation does in middle-aged and older adults, both with and without an exercise programme.

What the study found

In the study, published in the Journal of the International Society of Sports Nutrition, 64 participants aged 45 to 65 took part, with an average age of around 54.5 years. Participants chose whether to join an exercise programme. Within those groups, they were randomly assigned to creatine or placebo, taking five grams of creatine monohydrate twice a day for twelve weeks.

The exercise programme included three sessions per week combining resistance training and aerobic exercise. Participants were also asked to reach at least 10,000 steps on non-training days. The dietary component aimed for a daily calorie deficit of 300 to 500 kilocalories.

Results showed that creatine preserved lean mass (muscle and other non-fat tissue) even among participants who did not exercise. In the group that both trained and took creatine, improvements in body composition were greater than with training alone. Body composition was measured using DXA scans.

Important caveats

The study has limitations. Exercise participation was not randomised: participants self-selected. That makes it harder to fully separate the effects of exercise and supplementation. Food questionnaires showed no statistically significant differences in dietary patterns between groups. Average protein intake was relatively modest, around 0.94 grams per kilogram of body weight per day.

From a longevity perspective, this is worth watching. Muscle mass is a strong predictor of healthy ageing. If creatine protects that mass even without intensive exercise, it could matter for people who are less physically active. Larger, fully randomised trials are needed to confirm these findings.

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