CANT WAIT TO TRY! This plank challenge workout could be the key to toned arms and flat abs. It takes about 20 minutes (there are modifications for beginners) and will leave your arms feeling like jelly — in the best way possible.
The plank are a simple workout that can be performed anywhere at home, in a gym or on a holiday. The Plank exercise might be very simple, but at the same time it has a long list of benefits as it work(Beauty Day Routine)