The Claim
A 12-week high-intensity, low-volume concurrent training program does not improve aerobic capacity (VO2peak) in recreationally active men and women, despite increases in strength and lean body mass.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In recreationally active men and women, a 12-week concurrent training program that improves strength and muscle mass does not increase aerobic capacity (VO2peak).
See the scientific wording
Despite increases in strength and lean body mass, a 12-week high-intensity, low-volume concurrent training program does not improve aerobic capacity (VO2peak) in recreationally active men and women, suggesting that the interval training component was insufficient to elicit cardiovascular adaptations.
Short, intense workouts build bigger muscle fibers and make them more efficient at using oxygen internally, but they don't grow more blood vessels or strengthen the cellular power plants that produce energy for sustained effort, so the body can't take in or use more oxygen during intense exercise.
What the research says
1 studyThis workout made people stronger and added muscle, but didn’t help them breathe better during intense exercise — meaning the fast, short bursts of activity weren’t enough to improve heart and lung fitness.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.