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.
Based on simplicity and effectiveness, these upper-body moves are just what you need tone and sculpt your arms. Mix and match the exercises, play around with weights and reps and have fun with it! You'll see those guns perk up in no time.