Get your mind out of the gutter.
This workout is AWESOME. I've done it a few times now, and thought it was good enough to share. It's something that can be done anywhere, and is quick and effective.
100 jumping jacks
70 leg lifts**
60 jumping jacks
50 second plank hold
30 leg lifts**
20 power jacks***
10 minute jog
* I alternate wide-leg and normal squats in 10s (so 10 w-l, 10 reg, etc.). For added difficulty, I do a couple of the sets of 10 with my 15 lb. kettlebell. It makes a BIG difference.
** I alternate leg lifts by day. One day I will do these leg lifts, and the next I will do whichever one of these suits me at the time.
*** You can see how to do power jacks here.
Believe me, once you get to the 10 minute jog, you will want to fall down dead. Not even kidding. This workout usually takes me about 35 minutes with stretching, and you will WANT to stretch. Otherwise, you might not be able to walk for a couple of days (I learned that the hard way).
Hopefully some of you try it, and let me know what you think!