A comparison of muscle activation between a Smith machine and free weight bench press. J Strength Cond Res. 2010 Mar;24(3):779-84. doi: 10.1519/JSC.0b013e3181cc2237. Erratum in: J Strength Cond Res.

The participants were then divided into three groups that were instructed to rest for one, three, or five minutes between ...

According to Dr Milo Wolf, PhD, and Dr Mike Israetel, PhD, with the right approach, you can slash your gym time by 40% and still achieve the same results ...