After a few days of not working out and eating not so well the best way to galvanize the body is to do a leg centered workout. A run, and lots of squats will activate the whole body than any other type of weight-bearing exercise.
2 miles - 14:21 (Woodway - a real treadmill)
Overhead Squat 155#x 6, 8, 10, 4
Front Squat 175# 6, 5; 155# x 8, 7