My situation is pretty similar to yours. Overall, I'm smaller than you, 5'6", 147 lbs. But I used to weigh 200 lbs or so. I've been trying to just look good. A sprinter's physique, IMO, is awesome.
I am nearing the end of a cut, and what I have been doing is lifting 30 minutes per day, short rests between lifts, then doing an immediate HIIT workout after. With cool down, it's 15 minutes of cardio total. Now, I'm not putting in nearly as much time into my workout as a collegiate sprinter, but I am doing a simulation of the kind of work they do, I guess. In 45 minutes, I'm raising my
heart rate for short bursts, using all the muscles in my body (compound lifts), and getting short rests in between.
Alwyn Cosgrove's book
Afterburn is about how
interval training effects the metabolism and fat loss while preserving muscle. My workout isn't exactly what he prescribes, but I have been inspired by his ideas. If you've got a sprinter's physique hiding under some fat, this method may work to reveal it.
Here's my 200 lb tub of goo self:
http://www.discussfitness.com/forums...jim-before.jpg
Here's me now:
http://img.photobucket.com/albums/v2...hepii/trap.jpg
If I can get the layer of fat around my midsection to diminish a little more, I'll be very happy.