Both high-intensity and high-volume weight training programs can significantly increase strength and muscle performance in healthy young adults after 10 weeks of training, even though the workouts...

We analyzed the available evidence and found that both high-intensity and high-volume resistance training appear to improve strength in young adults. After 10 weeks of training, studies show measurable gains in strength and muscle performance regardless of whether the workouts focused on lifting heavier weights with fewer reps or lighter weights with more reps [1]. The evidence we’ve reviewed suggests that the way these programs are structured—whether by pushing close to maximum effort or by doing more total repetitions—doesn’t seem to prevent strength gains. Both approaches led to similar improvements in the individuals studied. This doesn’t mean one is better than the other, but rather that either method can be effective when followed consistently over time. We haven’t seen any studies in our review that contradicted this finding. All of the evidence points toward both methods working, though we don’t yet know if one leads to slightly more strength over the long term, or if certain people respond better to one style than the other. The studies we looked at focused on healthy young adults, so we can’t say whether these results apply to older adults, beginners, or those with health conditions. What we’ve found so far is that if you’re a young adult looking to get stronger, you have flexibility in how you train. You can choose heavier weights with fewer reps, or lighter weights with more reps, and still expect to see progress. The key seems to be consistency and effort—not the exact format of the workout.