The Summary
This eight-week study analyzed 158 resistance-trained men performing the bench press across twelve groups. Researchers compared three intensity levels (40–85% of one-repetition maximum, or 1RM) and four velocity loss thresholds (0%, 15%, 25%, and 50% bar speed drop-off). High intensity (70–85% 1RM) consistently optimized both muscle growth and raw strength. However, the velocity threshold dictated the specific adaptation: a 50% velocity drop maximized muscle hypertrophy and endurance, whereas limiting the drop to 25% maximized gains in absolute, maximal strength (1RM).
Why this is interesting
Traditionally, lifters believed training to complete failure was necessary for both size and strength. This study proves that bar speed drop-off, or velocity loss, acts as a precise dial to customize your results. If you want maximum muscle growth, push further into fatigue (a 50% speed drop). If your goal is pure strength, leaving reps in the tank (stopping at a 25% drop) actually yields superior results. This allows lifters to train smarter, target specific goals, and avoid unnecessary fatigue or injury.