1. Planks

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Planks have long been considered one of the best exercises for your core. In addition to your abs, this move engages your back, quads, and hamstrings, making it a great full-body exercise for runners. To do it, get into the �up� part of a push-up, with palms�on the floor directly under shoulders and legs extended behind you, forming a straight�line from head to heels. Hold for 10 to 30 seconds, keeping abs tight. Do�2 or 3 sets.

RELATED: 20 Ways to Do a Plank

2. Clamshells

Clamshells work your hips and glutes, parts of the body that runners regularly need to activate. To do them, start out by lying�on your side with legs stacked and knees bent at 45 degrees. Rest head on arm; place top hand on hip. With inside edges of feet touching, lift top knee as high as you can without shifting hips or pelvis. Pause; lower knee. Do 2 or 3 sets of 10 reps per side.

3. Side squats

Side squats are a great way to strengthen your outer highs, hips, and glutes. To do, stand with feet hip-width apart, hands on hips; squat. Stand; move left foot a step out. Squat again; step left foot in as you rise. Continue, alternating sides. Do 2 or 3 sets of 10 to 12 reps per side.

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