If you're an active guy who rides a bike for fun, taking a special green tea extract every day for four weeks might help you cycle farther and harder—like getting a 10% boost in distance and over 20% more power—without any caffeine.

Taking a daily decaffeinated green tea pill for four weeks might make working out feel easier for guys who exercise casually, so they don’t feel as tired or strained during their workouts.

Taking a specific green tea extract every day for four weeks helps your body burn more fat while you exercise—without making you burn more total calories—so your body uses fat as fuel more efficiently.

Taking a daily decaffeinated green tea supplement for four weeks may help your body burn more fat and less sugar during workouts, making your exercise feel more efficient.

Taking a specific green tea extract pill every day for a month helped young guys who exercise casually lose a little body fat—without losing any overall weight—while those taking a fake pill didn’t.

Drinking green tea might help you burn more calories and fat, but it’s not because of the caffeine—it’s something else in the tea, since just taking the same amount of caffeine by itself doesn’t do anything noticeable.