Plyometrics cardio: perfect hotel room workout - just pack the jump rope and a stopwatch! Repeat circuit for 20 min, take 5 min break and follow with 20 min of full-body moves (think push-ups, tricep dips, mountain climbers, reverse lunges, leg raises, prisoner full squats, planks/side planks with rotation, different crunch variations, prisoner single-leg deadlifts etc)
7 minutes HIIT workout, do every exercise 30 seconds with 2 to 3 session and interval rest for 10 seconds
Add in a Few Quick Bursts : The easiest way you can exercise more in 2013 is to incorporate quick workouts into your already-established fitness routine. A short series is perfect for your days off from the gym or as a burst of cardio in the morning before you start the day.