As many rounds+reps as possible in 16 minutes:
Start at [75/55] and ascend in weight by 20 lb increments until you find your safe limit.
Thought of the Day:
The notion that holding a heart rate of 180 bpm for twenty minutes on a bike is good cardio whereas holding 180 bpm for twenty minutes in a circuit of weightlifting is of lesser cardiovascular value is widespread yet ludicrous. – Greg Glassman