Are you dreaming of svelte arms but too tired to get out of bed and make it happen? This is the workout for you. Grab a pair of light dumbbells, sit up straight, press play, and let the toning begin.

For many, the quest for toned arms feels like an endless cycle of push-ups, planks, and bicep curls. But what if there was a more efficient and powerful way to sculpt your arms, a single exercise that ...