Metabolic cost of breathing

Older age increases metabolic cost of breathing in humans (6.6 ± 1.9% vs 4.4 ± 1.3% (P = 0.012) in males; 6.9 ± 2.5% vs 5.1 ± 1.4% (P = 0.004) in females).

“there was a main effect of age, with older males consuming a significantly greater fraction of V̇o2RM (6.6 ± 1.9%) than the younger males (4.4 ± 1.3%; P = 0.012)”

Humansat 65% V̇emaxrespiratory systemn = 40

The metabolic cost of breathing for exercise ventilations: effects of age and sex

Journal of applied physiology (Bethesda, Md. : 1985)·Jun 6, 2024

Female sex is associated with metabolic cost of breathing in humans (12.7 ± 4.0% vs. 10.7 ± 3.0% (P = 0.027)).

“At peak exercise, V̇o2RM represented a significantly greater fraction of peak oxygen consumption (V̇o2peak) in young females, 12.7 ± 4.0%, compared with young males, 10.7 ± 3.0% (P = 0.027)”

Humansat peak exerciserespiratory systemfemales

The metabolic cost of breathing for exercise ventilations: effects of age and sex

Journal of applied physiology (Bethesda, Md. : 1985)·Jun 6, 2024