What Do Carbohydrates Do for Your Workouts?

How carbs help during exercise

Your body can use carbohydrate from food and stored carbohydrate (glycogen) as fuel. That can be useful during running, cycling, team sports, and other sustained or high-intensity activity. In a systematic review of endurance exercise studies, carbohydrate intake improved performance on average, with larger effects in longer events; that doesn’t mean every workout requires a sports drink or gel. Research review on carbohydrate and endurance performance

For resistance training, the benefit is less certain for a typical fed workout. A systematic review found that extra carbohydrate was unlikely to improve strength-training performance when people had eaten and did up to 10 sets per muscle group; higher-volume sessions may benefit more. Systematic review of carbohydrate and resistance training

Ordinary foods can be enough

For generally healthy adults, a familiar snack before training is a practical option—not an individualized prescription. If you have a 60-minute workout after work and feel hungry, try a banana, a slice of toast, or a small bowl of oatmeal about 1–2 hours beforehand, adjusting the timing and amount to your comfort. For a longer ride or run, pack easy-to-carry foods such as a banana or a sandwich; practice with foods and fluids before relying on them during an event.

These are examples, not required servings. You do not have to eat immediately before exercise if you feel well and have eaten recently. A sports drink or gel may be convenient for prolonged exercise, but ordinary foods often work for everyday sessions.

A simple way to decide

For a short or moderate workout, start with your usual meals and notice whether you have enough energy. If you train fasted, do a long endurance session, or have a particularly demanding, high-volume workout, having carbohydrate beforehand or during may be worth trying. Change one thing at a time and judge it by how you feel and perform—not by a rule that says everyone needs the same amount.

Food can support training, but consistency and enjoyment matter too. If you’d like a workout partner for a run, ride, or gym session, Actively helps adults discover nearby people through shared activity interests, mutual matching, and chat. It’s an app for finding active friends—not a nutrition or coaching service.