I need to get back to doing TGUs again -- I was doing them on my short workout days, but after I figured out how to improvise a squat rack I replaced them with squats, pull-ups, presses, and swiss-ball crunches. When lifting at my limit for TGUs, it takes me as long to do three sets of five of those as it does to do three sets of five on everything else. Which, to be fair, makes some sense since I do five holding the weight with my left arm and five with the right, so I'm really doing ten reps per set, but you'd think that it would therefore only take me the time it takes me to do two of those four...

TGUs. Slow but awesome. Also, they make me sweat way more than doing anything else for the same amount of time.