The Claim
In healthy young men, activation of the muscle metaboreflex during dynamic exercise increases cardiac output primarily through elevation of heart rate, while activation of the muscle metaboreflex after exercise increases cardiac output primarily through elevation of stroke volume, due to differences in diastolic filling time and myocardial performance.
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 healthy young men, triggering the muscle metaboreflex during exercise raises cardiac output mainly by increasing heart rate, while triggering it after exercise raises cardiac output mainly by increasing stroke volume, because of changes in how much blood fills the heart between beats and how well the heart muscle contracts.
See the scientific wording
In healthy young men, activating the muscle metaboreflex during dynamic exercise increases cardiac output primarily through heart rate elevation, whereas activating it after exercise increases cardiac output primarily through stroke volume elevation, due to differences in diastolic filling time and myocardial performance.
When muscles are squeezed during exercise, the heart beats faster to push more blood, even though there's less time for the heart to fill between beats. When muscles are squeezed after exercise stops, the heart doesn't beat faster, but it fills more fully between beats and pumps harder with each contraction, pushing out more blood per beat.
What the research says
1 studyWhen you're still exercising and your muscles are squeezed, your heart beats faster to keep blood pressure up. But if you stop exercising but keep your muscles squeezed, your heart pumps more blood with each beat instead. The study shows this exact difference.
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.