Allow for timed sets instead of only reps...ex squats for 1 min
Sometimes i like to set a client to hit a specific number of reps and for some exercise i would love to be able to say 5 sets each lasting 1 min
Brant A Rotramel commented
Simply add in the timing to the description of the workout, or choose circuit. You could also just type in "for time" or as many as possible, or AMRAp and then explain to your clients what that means.
Harriet Olliffe commented
Agreed - or an 'AMRAP' approach.
For example, I want my client to do 20 mins, as many rounds as possible of 10 squats, 10 ring rows and 10 push ups.