In many fitness environments, there is a tendency to equate shorter rest periods with harder work. While shorter rests may increase cardiovascular demand and leave you feeling more fatigued, they are not necessarily better for building muscle.
Research suggests that longer rest intervals can actually enhance hypertrophy (muscle growth) by allowing athletes to maintain higher training quality and volume across a session.
More Recovery = Better Performance
When performing resistance training, each set depletes ATP and phosphocreatine stores, accumulates fatigue, and reduces force production. Longer rest periods allow these energy systems to recover, enabling you to lift heavier weights or perform more repetitions in subsequent sets.
This is particularly important for compound exercises such as squats, deadlifts, bench presses, and overhead presses, where large amounts of muscle mass are involved and fatigue accumulates rapidly.
What Does the Research Say?
Senna et al. (2016) found that longer rest intervals of 2-3 minutes or more improved performance during resistance training compared to shorter rest periods. By allowing greater recovery between sets, longer rests help athletes maintain training volume, one of the primary drivers of muscle growth.
Similarly, Buresh et al. (2009) and Longo et al. (2022) reported greater increases in muscle size when participants used longer rest intervals (>2.5 minutes) compared to shorter rests (<1 minute). The likely explanation is simple: participants were able to perform more quality work across the training session.
Interestingly, a review by De Salles et al. (2016) suggested that while rest periods of approximately 2 minutes are generally sufficient for hypertrophy, experienced lifters may benefit from an autoregulated approach. In practice, this means resting until you feel adequately recovered to perform the next set with intent and effort rather than following a rigid timer.
You Don't Need to Be Exhausted to Build Muscle
One of the biggest misconceptions in strength training is that a workout must leave you drenched in sweat and completely exhausted to be effective.
Muscle growth is driven by appropriate loading, sufficient effort, and progressive overload over time—not by how breathless you are between sets.
If your goal is hypertrophy, it may be more productive to focus on lifting challenging loads, pushing sets close to failure, and allowing enough recovery between sets to maintain performance.
Sometimes the smartest thing you can do for muscle growth is sit down, catch your breath, and wait another minute before your next set.
References:
1. Buresh et al. (2009) PMID: 19077743
2. de Salles et al. (2016) PMID: 27050709
3. Longo et al. (2022) PMID: 35622106
4. Senna et al. (2016) PMID: 26907842
