After finishing a set with full range reps, do half reps at the bottom stretched position until failure. The bottom half of the range matters most for muscle growth. Use this only on safer isolation or machine movements like dumbbell presses and leg extensions, not big compounds.
Try this simple hack after your sets to build muscle faster. Recent research suggests that the bottom half of an exercise, when the muscle is fully stretched, is the most important part for growth. To take advantage of this, trial this technique on the final set of your exercises, once you can't do any more full range of motion reps, continue your set by performing half reps at the bottom position to stress your muscles in that stretch position until you reach failure. But be careful, this technique is not suitable for big exercises like squats, deadlifts, and head press. Instead, try it out on safer exercises like dumbbell presses, flies, leg extensions, tricep extensions, and bicep curls.