Lower Your Fitness Age: Your Exclusive Two-Week Plan: Week 1
Plank: Start in a plank, with elbows bent beneath shoulders. Alternate between keeping forearms on floor and straightening arms. Do for 1 minute with a 20-second rest; repeat. Extend left hand and leg toward ceiling and hold for 25 seconds; repeat on opposite side. Do as many reps as possible on both sides, taking a 30-second rest in between. Back Plank: Start in a reverse plank with upper back on floor and feet raised on stool....