You need to get the heart rate up fast, so start off with like jumping jacks, really move the arms and legs, then do "skaters" and "Burpies" then repeat.
I think and have found results. The best workout is jogging anywhere between 5-8 minutes. It depends
on the age and how much relaxed you are. One thing more in early 2 to 3 days your legs will be
locked. After some massage and practice of 7 days it will be Ok.
In such a short period of time, you have few options. Try doing a triple superset of alternating squats, elevated push-ups, and biceps curls, three sets each, with no rest.
