Loop a towel through the handle of ... Keeping the elbows close to the waist, curl the hands upwards until the thumbs meet the collarbone. Reverse the movement, ready to repeat.

To work the muscles on the other side of your forearm, McSorley suggests a reverse wrist curl. For this move, you’ll need a sturdy towel and a pull-up bar. While a regular pull-up could also do ...