Why eating more or working out more changes your body's calorie burn
Effects of increased energy intake and/or physical activity on energy expenditure in young healthy men.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Resting metabolic rate increased during negative energy balance after adjusting for fat-free mass loss.
Common belief is that metabolism slows during dieting due to muscle loss—but this shows the body actively adapts beyond just losing tissue, possibly to conserve energy in unexpected ways.
Practical Takeaways
Increase physical activity by 50% to boost your daily calorie burn, even if you don’t change what you eat.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Resting metabolic rate increased during negative energy balance after adjusting for fat-free mass loss.
Common belief is that metabolism slows during dieting due to muscle loss—but this shows the body actively adapts beyond just losing tissue, possibly to conserve energy in unexpected ways.
Practical Takeaways
Increase physical activity by 50% to boost your daily calorie burn, even if you don’t change what you eat.
Publication
Journal
Journal of applied physiology
Year
1994
Authors
M. Goran, J. Callés-Escandon, E. Poehlman, M. O'connell, E. Danforth
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Claims (4)
When two people consume the same net calorie deficit, their resting metabolic rates and hormone levels may differ depending on how much total energy they are expending through activity and metabolism.
When young healthy men eat fewer calories than they burn, their bodies burn slightly more energy at rest than expected based on the muscle they lose, suggesting other biological changes are contributing to this effect.
When young healthy men increase their physical activity by 50%, their total energy expenditure rises significantly, even if their food intake does not change, indicating that physical activity has a major influence on how much energy the body uses.
When young healthy men consume 50% more calories than they burn, their resting metabolic rate rises, even if their physical activity levels stay the same.