Slow reps aren't automatically better for muscle growth

Making every rep painfully slow can reduce performance without adding a growth advantage.

Slowing a repetition increases time under tension, but time alone does not determine muscle growth. Research comparing repetition tempos generally finds similar hypertrophy across a fairly broad range, provided sets are challenging and total training volume is sufficient.

Extremely slow reps can actually work against you. Moving at a deliberately sluggish pace often forces you to use less weight or complete fewer reps, reducing the total high-force contractions that stimulate growth. The eccentric phase should be controlled, but stretching it to ten seconds does not create a special anabolic effect.

Tempo is still useful for maintaining technique, limiting momentum and keeping tension on the target muscle. Lower the weight under control, lift with strong intent and choose a pace you can repeat consistently; do not turn the stopwatch into the main goal.

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