The Claim
In male academy soccer players aged 16–19, one weekly session of high-intensity resistance training (90% 1RM, 2 sets of 4 repetitions) produces similar improvements in absolute and relative back squat strength, squat jump height, and vertical countermovement jump height as moderate-intensity training (80% 1RM, 3 sets of 8 repetitions), despite using 58% less total training volume.
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 male soccer players aged 16 to 19, one weekly session of high-intensity resistance training with heavy weights and few repetitions improves strength and jump performance to the same degree as a session with lighter weights and more repetitions, even though the high-intensity session uses 58% less total work.
See the scientific wording
In male academy soccer players aged 16–19, one weekly session of high-intensity resistance training (90% 1RM, 2 sets of 4 repetitions) produces similar improvements in absolute and relative back squat strength, squat jump height, and vertical countermovement jump height as moderate-intensity training (80% 1RM, 3 sets of 8 repetitions), despite using 58% less total training volume.
Lifting very heavy weights forces the body to activate more muscle fibers at once and fire them faster, which makes the muscles produce more force without getting bigger. This improvement in how the brain and muscles communicate allows for stronger squats and higher jumps, even when doing less total work.
What the research says
1 studyIn teenage soccer players, lifting super heavy weights just once a week with few reps improved strength and jumping ability just as much as lifting lighter weights more times — even though they lifted way less total weight. Both groups got stronger and jumped higher than players who didn’t lift at all.
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.