Thanks for the info.
I have some more questions please.
So you can work your way from the bottom up using 'If the workouts take longer than 30 minutes or less than 5 minutes, decrease or increase your level, respectively' as a gauge?
Does that apply to days two and three since day one is set at 20 mins?
Before discovering SF I was doing 8 sets of 5 pull ups, 15 squats, 10 push ups and 5 chin ups every second morning at pretty easy pace.
Still wanted to keep the load up and have an element of challenge and something to work toward so I dove in at level 7 about three or four weeks ago and have seen gradual improvement in my times but nowhere close to finishing days 2 & 3 in under 5 minutes.
How do you choose the level to stay at? Do you for example choose one where you can complete days 2 & 3 in about 6 minutes, wait till you hit them in under 5 and move on or, the other end of the spectrum, choose a level where you do days 2 & 3 in 30 minutes and keep at it until you've reach the 5 minute level?