Working your upper-body doesn't have to be a chore, with hours spent at the gym. Instead, you can use this routine to raise your heart rate and work muscles across your entire body, all using just a couple of dumbbells.
The session from NASM-certified personal trainer Sydney Cummings Houdyshell follows the efficient Tabata format — 20 seconds of work followed by 10 seconds of rest — allowing you to finish up in just 30 minutes.
