The Jefferson Curl may sound like an exercise that will blow up your biceps, but (sadly) it’s far from that. In fact, the Jefferson curl is more of a mobility exercise that strengthens the muscles of the lower back and core, as well as stretching the hamstrings, to help build a more resilient spine. That means better posture, improved stability, and less pain— and who doesn't want that?
The movement itself looks a little…odd, but it’s one that’s been popular with powerlifters and gymnasts for years. It almost resembles a very poorly executed Romanian Deadlift that requires you to stand on an elevated surface, whilst holding either a dumbbell or kettlebell, while slowly rounding your back towards the floor.
