Lie on your stomach, feet apart (farther apart is easier) and push up with your elbows, supporting your weight on your forearms (keep abs tight). Extend one arm for two seconds, then the other. Strengthens shoulders, abs, trunk.
PILLAR BRIDGE LATERAL
Lie on your side with your elbow under your shoulder, feet stacked. Using your forearm, push your hip off the ground. Keep your head in line with your spine. Hold. Strengthens shoulders, abs, obliques.
Assume a push-up position with your hands on the ball, feet on the floor. Keep your belly button drawn in and push off the ball. Keep your fingers pointed down. Control the ball. Strengthens chest, arms, torso.
Weak abs can limit your ability to keep your spine straight at address. To strengthen, lie supine with knees bent, holding a club over your head. Without moving the club, try to bring your feet up and under the club. This will force a posterior tilt of the pelvis and work the abdominals. Do two sets of 10 reps.• Breaking 100-90-80: Strengthen Your TowerABOUT THE AUTHORS: Co-founders of the Titleist Performance Institute in Oceanside, Calif., Dave Phillips, a PGA professional, and Greg Rose, a golf fitness specialist, host the "Golf Fitness Academy" on the Golf Channel. They have created a comprehensive, free golf and fitness website, mytpi.com