The Claim
In healthy male endurance athletes, the left ventricular filling rate increases from 185 ± 62 mL/s at rest to 986 ± 192 mL/s during upright bicycle exercise at 160 bpm, representing a fivefold increase.
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 male endurance athletes, the rate at which blood fills the left ventricle of the heart rises from 185 mL per second at rest to 986 mL per second during intense cycling at 160 beats per minute, a fivefold increase.
See the scientific wording
In healthy male endurance athletes, left ventricular filling rate increases from 185 ± 62 mL/s at rest to 986 ± 192 mL/s during upright bicycle exercise at 160 bpm, representing a fivefold increase.
When the legs pump hard during cycling, blood is squeezed upward from the legs and abdomen into the heart. The heart fills faster because it is pulled open like a vacuum as it relaxes, and the walls of the heart stretch more easily because they are trained to be more flexible. This lets more blood rush in with each beat.
What the research says
1 studyThe study found that when elite athletes cycle really hard, their hearts fill with blood five times faster than when they're resting — just like the claim says.
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.