This is a basic but thorough upper body routine that uses the 40/20 format- 40 seconds of work followed by 20 seconds of rest. This interval format repeats 6 times and then there's a 1 minute break. There are 3 of these which makes a 20 minute total workout time. It's divided into different parts of the upper body (largest muscles to smallest):
- Back & Chest
- Shoulders
- Biceps & Triceps
I am using a pair of 8s, 10s, and 15s, but if you have other weights available, have them ready to switch out if you need more or less of a challenge.