Complete 32 intervals of 20 seconds of work followed by ten seconds of rest where the
first 8 intervals are back extensions
second 8 are push-ups
third 8 intervals are sit-ups, and finally
last 8 intervals are squats.
There is no rest between exercises.
Post total reps from all 32 intervals to comments like this:
be-121, pu-91, su-75, sq-123 total- 421 reps! 15:50