Do carbs make you stronger in the gym?
The Effect of Carbohydrate Intake on Strength and Resistance Training Performance: A Systematic Review
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Eating carbs before a workout only helps if you haven't eaten all day or if you're doing a ton of sets. If you're already fed or eating the same calories as others, carbs don't make you lift more or grow bigger muscles.
Surprising Findings
A carbohydrate meal improved performance compared to water—but not compared to a sensory-matched placebo breakfast.
This suggests the benefit isn't from energy or glycogen—it's likely placebo or hunger suppression. People feel better because they think they're 'fueling up,' not because their muscles have more fuel.
Practical Takeaways
Skip pre-workout carbs if you’ve eaten within 3–4 hours and aren’t doing 10+ sets per muscle group.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Eating carbs before a workout only helps if you haven't eaten all day or if you're doing a ton of sets. If you're already fed or eating the same calories as others, carbs don't make you lift more or grow bigger muscles.
Surprising Findings
A carbohydrate meal improved performance compared to water—but not compared to a sensory-matched placebo breakfast.
This suggests the benefit isn't from energy or glycogen—it's likely placebo or hunger suppression. People feel better because they think they're 'fueling up,' not because their muscles have more fuel.
Practical Takeaways
Skip pre-workout carbs if you’ve eaten within 3–4 hours and aren’t doing 10+ sets per muscle group.
Publication
Journal
Nutrients
Year
2022
Authors
Menno Henselmans, T. Bjørnsen, Richie Hedderman, F. T. Vårvik
Related Content
Claims (9)
Increased carbohydrate intake enhances intramuscular glycogen storage, thereby improving resistance training performance and volume capacity.
Whether you eat a lot of carbs or very few, as long as you're getting enough calories and protein, your strength and muscle growth won't be different after 3 months of lifting weights.
Eating carbs before a workout when you haven't eaten all night might make you feel like you can lift more—but it's probably because you feel less hungry or think you're getting energy, not because your muscles actually have more fuel.
Eating carbs before or during a normal weightlifting session doesn't make you stronger or let you lift more reps, as long as you've eaten recently and aren't doing super long workouts.
Whether you eat a lot of carbs or very few, as long as you’re eating the same total calories and protein, you’ll gain the same amount of strength and muscle over several months of weightlifting.