I do 1:4 work to rest on the eliptical. 30sec sprint to 2min rest (at around 70%) for 15 min, plus a 5min warm up, 5x per week BEFORE lifting. I've been doing these for about 3 months now. Skeptical at first, but lifts haven't gone down at all, better pumps (which makes sense), and have found I don't need as much rest in-between sets. After training for 20 years, it's rare to find something new that makes that big of a difference. Btw, currently 5'9, 235#, at about 12% or less.