Within a personal training sessions, how many sets do you do of the same exercise for a traditional circuit training session? Years ago the standard was 3, I see some trainers doing 2 sets and others just 1. What do you do and why?
For a class, I set up the circuit so that the fittest individuals can get in two full rounds and then a few sets on their weakest group. The rest do what they can, but leave time for at least one extra set of their weakest group.