>>6135203Do as many as you can in a minute, even if you need to stand, while resting as little as possible. Once pullups get impossible from fatigue, do negatives until you can't. The minute should be up by this time; if not, grab an exercise band and do pulls until the minute is up.
Alternate work days with rest until you can hit 15-20 comfortably. At that point, you're more than ready to start throwing weights on the belt.
