The Claim
Resistance training in collegiate women tennis players over a 9-month period reduces maximal oxygen uptake (VO2max), irrespective of the specific training structure.
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.
Collegiate women tennis players who perform resistance training for 9 months experience a decrease in their maximal oxygen uptake, regardless of how the resistance training is structured.
See the scientific wording
Resistance training in collegiate women tennis players reduces maximal oxygen uptake (VO2max) over 9 months, regardless of training structure, indicating that strength-focused programs may compromise aerobic capacity in athletes with limited training time.
When muscles are repeatedly stressed with heavy lifting, they grow bigger and stronger by using energy systems that don't need oxygen. This change causes the muscle to lose some of its ability to use oxygen efficiently, which lowers the body's maximum oxygen use during intense exercise.
What the research says
1 studyStudy: Physiological changes with periodized resistance training in women tennis players.
When female college tennis players added strength training to their routine for 9 months, their aerobic fitness went down—even though they didn’t cut back on cardio. This suggests that focusing too much on lifting weights might hurt endurance when there’s not enough time for both.
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.