Does Making a Bench Press Slower Make It Better for Strength?

You're watching a lifting video, and the bar takes several seconds to rise. Your first reaction might be, "That's a slow rep." But imagine asking the lifter to explain it. Did they choose that pace, or were they trying to move faster? If you're looking for ideas for your own training, that is worth asking before deciding what to copy. It gives us a starting point for a closer look at what "slow" means in a lift.

A speed instruction and the speed achieved are different variables. In bench-press testing of 30 physically active men, heavier relative loads could move more slowly despite the same maximal-velocity instruction. The recorded measure covered the propulsive portion of the lift, rather than the whole repetition. Slow movement was therefore compatible with an instruction to move faster. That instruction prescribed an attempt; it did not directly measure mental effort or let an observer infer it from bar speed.¹

Different speed instructions also accompanied different strength gains in a six-week Smith-machine bench-press comparison. Twenty recreationally trained young men trained three times a week, either under maximal-intended-velocity instructions or with deliberate half-velocity lifting. Both groups improved their one-repetition maximum, the greatest load lifted once in the tested bench press. Gains were larger in the maximal-intended group. The groups were balanced for starting performance rather than randomly assigned, limiting what this small, short comparison can establish.²

The difference in gains cannot be assigned to intention alone. Programmed relative loads, sets, repetitions and rests were matched, but achieved velocity and the duration of the concentric, or lifting, phase changed together. Relative load expresses the load against a lifter's one-repetition maximum; matching it does not mean identical kilograms across people or sessions. Time under tension also differed. The result concerns the tested combination of instructions, achieved speed and lifting duration. It cannot isolate which component produced the difference or establish a tempo rule for every lifter and outcome.²

When considering advice about lifting tempo, the practical question is what you are being asked to do and for which training goal. A useful explanation would specify the exercise, the intended pace, and the result being discussed. That level of detail lets you consider the advice on its own terms, without having to endorse slow or fast lifting as a general approach.