Matching rest to the exercise
Rest between sets scales with how taxing the movement is. Small isolation exercises recover quickly, so one to two minutes is usually enough. Multi-joint compound lifts demand more, in the range of two to three minutes, while heavy compounds like squats and deadlifts can call for three to five minutes before performance returns.
These ranges reflect how long the muscular and central recovery systems need to restore force output.
Why longer rest can help muscle and strength
Research has challenged the old idea that very short rest is best for growth. Studies suggest that resting long enough to perform the next set with quality, often two to three minutes or more on compounds, supports both strength and hypertrophy by preserving the number of effective reps.
Optimal rest varies with the load, the lifter, and the goal, so these figures are practical defaults rather than fixed prescriptions. This is general educational information about training, not medical advice.