One of the core reasons I started playing , so hopefully it gets fixed up soon . <| sep |> There is only aluminum in antiperspirant and lots of those don ' t have it anymore <| sep |> Well . Here ' s the deal . With circuit training you have the ability to perform more work in a shorter amount of time . With standard horizontal training exercise , rest , set 2 , rest set 3 act you allow better form control . The reason being that feedback is better maintained . If I ' m helping you squat and you keep perfecting it as your next set comes you ' ll become more efficient as you keep the feedback , but if you ' re moving on to other workouts in a circuit and coming back to squats after 5 other exercises you ' re less likely to remember the things you need to fix or work on . As a beginner its probably more efficient to keep it horizontal until you perfect techniques and fix compensations and then move onto circuits for more work in less time