Why? the only delta, is that machines don't (usually) force the use of stabilizer muscles. The tendons only connect the muscles to the bones (and contain specialized nerve endings), so why wouldn't a machine bench press strengthen tendons like a free-weight press?Daniel Boone said:Only thing I have wrong with machines is they tend to not strenthen the tendons as well as resistance training. Everyone knows they can do alot more on machine. In archery you want to work work tendons and joints also. There are some good machines in gyms today such as Cybec.