. In under an hour a week, runners will strengthen their core and key running muscles to build a better runner’s body. Strength training is crucial to better running and injury prevention. But it’s difficult to know which exercises work best for runners or to get motivated to hit the gym. In , running coach and personal trainer Jeff Horowitz simplifies strength training into , with no gym or pricey equipment required. Designed specifically for runners, the Quick Strength program pinpoints the exercises that really work. Inside you’ll find: This highly effective, easy-to-implement program will make you a stronger, faster runner in under an hour a week so you can stay on the road or trail.