You do not need 90 minutes in the gym to build muscle. This upper/lower split uses shorter rest periods and supersets to deliver serious hypertrophy stimulus in 45 minutes per session.
For heavy compound lifts, longer rest (2+ minutes) is ideal for strength. But for hypertrophy, moderate rest (60-90 seconds) creates metabolic stress that contributes to muscle growth. The supersets pair opposing muscle groups so each muscle still gets adequate recovery between sets.
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You do not need 90 minutes in the gym to build muscle. This upper/lower split uses shorter rest periods and supersets to deliver serious hypertrophy stimulus in 45 minutes per session.
Why Short Rest Works for Hypertrophy?
For heavy compound lifts, longer rest (2+ minutes) is ideal for strength. But for hypertrophy, moderate rest (60-90 seconds) creates metabolic stress that contributes to muscle growth. The supersets pair opposing muscle groups so each muscle still gets adequate recovery between sets.