Dayna, there's an excellent article in the training forum on HST...my husband showed it to me, and that's where I got the idea. I'm not so good with the links, but maybe a kind host would post one...
Essentially, I work the whole body every time I lift, which is three times a week. I lift as heavy as I can, in six week cycles. The first two weeks, I do 2/15; then 2/10 for two weeks; then 2/5 for two weeks. (I raise the weight whenever I can, keeping within these reps...I did a PR today, benching 100 lbs. for 10!) Then I've got to take two weeks off (that's going to be hard! just cardio and yoga/pilates for two weeks...I'll be itching to lift again) to decondition, then start the thing over again.
The most noticable benefit to this so far has been in strength gains...I'm pretty sure I'll be seeing a difference in my physique soon, too.