You know I am a big fan of interval and circuit training.
The great thing about it is that no matter how much time you have, you know you are going to get an intense workout.
I have called today's routine a "60 minute workout", but truthfully, it is an "any time workout". If you only have 20 minutes, simply do the circuit once. If you have 40 minutes, do it twice.
You are still going to reap all of the benefits and feel great when you are done.
Check out the end of the post for some links to exercises you may not be familiar with. (and always check with your doctor before you start a new exercise program.)
One Arm Row/Triceps Kickback
Back Leg Lifts/Rear Delts
How long is your usual workout?
Mine varies from 30-90 minutes depending on the type of activity I am doing.
P.S Don't forget to enter the Free Online Personal Training Giveaway!