Michael K. Ryan, M.D., an orthopedic surgeon in Birmingham, Alabama, tells us why the Jefferson curl is his favorite move for desk jockeys. THE JEFFERSON CURL is the stretch with the highest return on investment, helping the most muscles in the least amount of time. It’s ideal for anyone who stands for long periods of time, or who have desk jobs—basically all of us. The 30 Best Abs Exercises of All Time The curl addresses posterior chain issues, referring to the muscles that run from the base of the neck to the heels. Typing at a computer or cradling a phone on your shoulder lead to neck and shoulder tightness, which can pull up on the middle back , glutes , and hamstrings . Sitting stiffens calf muscles and glutes, pulling down on the mid-back and shoulders. Either way, your posterior chain needs TLC. To do the curl, stand tall at the edge of a bench or plyo box, without a weight or holding a light kettlebell in both hands. Keeping legs straight, slowly bend over, startin