The Claim
In resistance-trained individuals, load progression and repetition progression methods result in similar improvements in countermovement jump performance over an 8-week training period.
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.
Among people who regularly lift weights, increasing the weight lifted and increasing the number of repetitions produce the same improvement in explosive jumping ability after eight weeks of training.
See the scientific wording
In resistance-trained individuals, both load and repetition progression methods produce similar improvements in countermovement jump performance over an 8-week period, suggesting neither method provides a clear advantage for explosive power.
When muscles are pushed to fatigue with high repetitions, the main muscles tire first, so other nearby muscles take over to keep the movement going. This forces those helper muscles to grow stronger over time, which helps the body produce more power during jumps without needing heavier weights.
What the research says
1 studyIn people who already lift weights, whether you make the weights heavier or do more reps over 8 weeks, your jump height doesn’t improve any more with one method than the other—both work about the same.
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.