Reduced Risk of Injury
Improving the quality of the movement obviously helps to reduce the risk of injury for athletes. But in addition, slowing down the tempo of lifts can ease the stress placed on joints and shift that additional stress to the muscles powering the lift. More stress on the muscles and less on the joints is a good thing. Muscles are far better at adapting to increased loads. Connective tissue typically takes longer to strengthen and adapt to the increasing loads, so by slowing down the tempo you can give your connective tissue some rest while still strengthening the surrounding musculature.
Tempo prescriptions also naturally control intensity (and perhaps, rein in egos). Let’s use the bench press as an example. If you excessively load the barbell you might be tempted to speed up the lowering phase and bounce the barbell off your chest – don’t lie, you do this. But if you know that the prescription calls for a 3 second descent and a 2 second pause at the bottom, you’re not going to be tempted to load anywhere close to the same amount. Don’t believe me? Give it a shot.