Four Twenty-five is a well scripted, full body circuit that will push you beyond your normal limits. While increasing muscular endurance, and overall stamina, Four Twenty-five will give you the body you crave and work hard for. When conducting this work out be sure to not compromise form and do the events with a weight that you feel can be done for 4 rounds at 25 repetitions. Increase the weight as needed. It's four rounds total and you can manipulate the program to fit your desires. The way it works is you'll complete the first 25 repetitions on one exercise, then advance to the next one. Complete your 25 repetitions there and move on. Take a 2 minute break in between stations.