Most people start their fitness journey by hitting the gym, signing up for yoga, or buying running shoes. Exercise is powerful — it strengthens muscles, improves cardiovascular health, and boosts mood through endorphins. But here’s a surprising fact: when it comes to weight management, exercise alone is often not enough.

A landmark study in Current Biology (2016) showed that the human body adapts to higher levels of activity by reducing energy expenditure elsewhere. In other words, when you burn more calories during workouts, your body may subconsciously conserve energy later — sitting more, fidgeting less, even slowing metabolism. This “compensation effect” is why people who exercise intensely without adjusting their eating habits often see disappointing weight results.

That’s where intermittent fasting becomes a game-changer. Pairing movement with time-restricted eating helps bypass the compensation trap. Research in Obesity Reviews (2021) suggests that combining intermittent fasting with exercise amplifies fat loss, preserves lean muscle, and improves insulin sensitivity more than either strategy alone.

Fastry makes this synergy practical. By structuring eating windows, you’re not undoing your workout with late-night snacking. Instead, your body stays in fat-burning mode longer — making every step, squat, or push-up count even more.