This weekend workout focuses on two "macro" aspects of fitness: strength and conditioning. Contrary to popular belief, you don't need to spend hours in the gym to build up these areas.
That's where this quick circuit comes in. It's short, but effective. Do A1, A2, and A3 with no rest between exercises. When you finish all three, then take your rest. Rest just long enough to recover for the next round. You'll complete 3 rounds total.
For an exercise like the pullup, 80-90% effort means you should go 1-2 reps shy of failure.