While the showoff muscles get all the acclaim, they'd be nothing without the supporting cast of smaller stabilizers and assisting muscles. Ignore them, experts say—and you'll eventually pay the price. The cost? Injury. Missed workouts. Painful runs. An unbalanced body. Wondering if your'e guilty? Here, experts discuss the most neglected muscles, why they're important, and how to strengthen them for an even, injury-free physique.
You probably work your upper back and traps for that wide expanse, but you're likely neglecting the very muscles that keep you upright. The erector spinae is actually a bundle of muscles and tendons that extend throughout the lower, mid and upper back. "They're more about posture than anything," says Holland. "Weak spinal erectors and poor posture may lead to back pain and sports injuries."
Strengthen it: Lie face down over a back extension machine with heels anchored. (You can also use a fitness ball if you have a partner to hold down your ankles). Place your hands behind your head with elbows out to the sides. Slowly raise your torso (don’t swing) just until your body forms a straight line, with ears, shoulders, hips, knees and ankles in line. Slowly return back to start. Do three sets of 10-12 reps.