The Claim
Left ventricular end-diastolic volume accounts for 50.3% of the variance in maximal oxygen uptake (VO2max) in a population of female endurance athletes and non-athletes, indicating that cardiac filling capacity is a major determinant of aerobic performance in this group.
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 women who are either endurance athletes or non-athletes, the amount of blood the left ventricle holds just before it contracts explains 50.3% of the differences in their maximum oxygen consumption during exercise, showing that heart filling capacity strongly influences aerobic performance.
See the scientific wording
Left ventricular end-diastolic volume explains 50.3% of the variability in maximal oxygen uptake (VO2max) among female endurance athletes and non-athletes, indicating that cardiac filling capacity is a major determinant of aerobic performance in this population.
Regular long-term aerobic exercise causes the heart's main pumping chamber to grow larger, allowing it to hold and pump more blood with each beat. This increased blood flow delivers more oxygen to the muscles during intense activity, which directly determines how much energy the body can produce aerobically.
What the research says
1 studyStudy: Female athlete's heart: Systolic and diastolic function related to circulatory dimensions
The study found that about half of why some women can exercise harder than others comes from how big their heart's main pumping chamber is when it's filled with blood — bigger chamber, more oxygen delivered, better performance.
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.