Absolutely not. I began doing Static Contraction using free weights after reading the book “The Golfer’s Two Minute Workout” co-authored by John Little and Pete Sisco in which they described static contraction workouts using free weights or machines of the day. Very soon however I outgrew the limits of conventional free weights and machines. I remember one time specifically doing the Leg Press at the YMCA with Free Weights. I had every single 45 pound plate in the entire gym on the leg press machine and it just was not enough to perform the exercise to my maximum capability.
Not to mention the fact that it was extremely dangerous AND I always had to have at least 1 if not 2 spotters for many exercises. Using free weights or conventional machines is vastly inferior to using the PeakFitPro, however you will make great gains at the gym using conventional methods.