Why your muscles run out of fuel during weightlifting
Acute effects of resistance exercise on skeletal muscle glycogen depletion: A systematic review and meta‐analysis
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
When you lift weights, your muscles use up stored sugar (glycogen) — but how much depends on how you lift.
No biological mechanisms were identified in this study. This may be an epidemiological, observational, or survey-based study that reports associations rather than proposing causal biological pathways.
Systematic Reviews & Meta-Analyses
Max 100Randomized Controlled Trials
Max 90Cohort Studies
Max 72Case-Control Studies
Max 58Cross-Sectional Studies
Max 44Case Reports & Case Series
Max 30Expert Opinion & Narrative Reviews
Max 550 / 100
Evidence Score
The highest quality evidence. These studies systematically search, appraise, and synthesize results from multiple individual studies, providing the most reliable summary of current knowledge.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
When you lift weights, your muscles use up stored sugar (glycogen) — but how much depends on how you lift.
No biological mechanisms were identified in this study. This may be an epidemiological, observational, or survey-based study that reports associations rather than proposing causal biological pathways.
Systematic Reviews & Meta-Analyses
Max 100Randomized Controlled Trials
Max 90Cohort Studies
Max 72Case-Control Studies
Max 58Cross-Sectional Studies
Max 44Case Reports & Case Series
Max 30Expert Opinion & Narrative Reviews
Max 550 / 100
Evidence Score
The highest quality evidence. These studies systematically search, appraise, and synthesize results from multiple individual studies, providing the most reliable summary of current knowledge.
Publication
Authors
Hamidvand A, Delleli S, Rothschild JA, Chenaghchi F, Jafari A, Naderi A
Related Content
Claims (10)
Changing the weight you lift during a workout burns more muscle sugar than lifting the same weight the whole time.
People who don’t lift weights regularly burn more sugar from their muscles during a workout than people who lift regularly.
After a weightlifting workout, the main leg muscle loses a lot of its stored sugar energy—about 21% on average—which can make you feel tired and affect how well you do in your next workout.
People who don’t lift weights regularly lose more muscle sugar during a workout than those who train regularly—likely because their bodies are less efficient at using energy.
The more sets you do when lifting weights, the more sugar your muscles burn through.