Plank: (works abdominals and lower back)
Begin facedown on the floor, propped up on your forearms, with knees and feet together. With your elbows under your shoulders, lift your torso, legs, and hips in a straight line from head to heels. Hold as long as you can.
For an extra challenge try adding leg lifts. Raise your right leg a few inches, keeping the rest of the body still. Lower and repeat with your left leg. Don't forget to do your side planks, too!
Bridge: (works glutes and hamstrings)
Lie faceup on the floor, with your knees bent 90 degrees, your feet on the floor. Lift your hips and back off the floor until your body forms a straight line from your shoulders to your knees. Hold for five to 10 seconds. Lower to the floor and repeat 10 to 12 times.
Runners: What are your go-to strength workouts?