Bent-Over RowRest your left knee and arm on a bench, bend your right elbow and lift a dumbbell straight up. Lower. Do 15 reps per arm.
and building core strength for good posture will help prevent injuries," says Pierce.Here's howAfter doing the envelope run (above), do two sets of the following: 30 seconds each of press-ups, squats and crunches; 60 seconds of planks and calf raises; 90
