How Coffee Caffeine Reduces Exercise Muscle Pain

If you’ve ever hit the gym hard and woken up the next day with stiff, aching muscles, you’re not alone. Delayed-onset muscle soreness—or DOMS—can turn even a light walk into discomfort. Many people reach for painkillers, but recent research suggests there might be a simpler, everyday solution already sitting in your kitchen.

The short answer? About as much caffeine as you’d find in two cups of coffee can reduce muscle soreness by up to 48%, especially if you don’t normally drink coffee. That’s based on a controlled study involving young women who were not regular coffee drinkers or exercisers.

What the Study Found on Caffeine and Muscle Soreness

Researchers at the University of Georgia tested nine female college students who were both infrequent coffee drinkers and not regular exercisers. After putting them through one to two days of physical training that caused muscle soreness, the team gave some participants a caffeinated beverage and others a placebo drink. They then had the subjects perform leg exercises again. Those who consumed caffeine experienced 48% less muscle pain compared to the placebo group. In follow-up activity, the caffeine group continued to report 26% less pain.

How Much Caffeine Is in Two Cups of Coffee?

While the study did not specify the exact milligrams, standard estimates place the caffeine content of an average 8 oz (240 ml) cup of coffee at around 95 mg. Therefore, two cups would deliver roughly 190 mg of caffeine. This level was enough to produce a significant reduction in perceived muscle soreness among the test subjects.

Why Caffeine Works—And Who Benefits Most

Caffeine is believed to affect the way your nervous system perceives pain. By blocking adenosine receptors, it may reduce the signals that cause you to feel soreness. However, the effect appears to be much stronger in people who do not regularly consume caffeine. For those who drink coffee daily, the body builds up a tolerance, and the pain-relieving benefits are noticeably reduced. That means the findings apply primarily to occasional or non-coffee drinkers.

What This Means for Your Post-Workout Routine

If you’re new to regular exercise or don’t usually drink coffee, having a moderate amount of caffeine after a tough workout could help ease the muscle stiffness that follows. This doesn’t mean chugging energy drinks—it means a couple of cups of coffee, timed appropriately after your session. It’s a low-cost, widely available option that might help you recover more comfortably.

Frequently Asked Questions

How much caffeine do I need to reduce muscle soreness?

About 190 mg of caffeine—the approximate amount in two 8 oz cups of coffee—was shown to reduce muscle soreness by up to 48% in non-regular coffee drinkers. That level also reduced later exercise pain by 26%.

Does caffeine work for everyone?

No. The pain-reducing effects of caffeine are much stronger in people who do not regularly drink coffee. Regular coffee drinkers likely have a tolerance that reduces or eliminates these benefits.

What kind of exercise causes the soreness this helps with?

The study focused on general physical training that led to delayed-onset muscle soreness (DOMS), the typical stiffness and ache you feel after starting or intensifying a workout routine.

When should I drink coffee to help with muscle pain?

The study didn’t specify timing, but logically, consuming caffeine after your workout—and once soreness begins to set in—would be most effective for reducing discomfort during movement.

Can I use other sources of caffeine, like tea or energy drinks?

The study used caffeinated beverages, but did not test types beyond coffee. Other caffeine sources may have similar effects, but the research specifically measured outcomes with caffeine levels found in about two cups of coffee.

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