FYI Fitness Tips: Core exercises that help strengthen the lower body

In the final installment of our ACL series, trainer Phil Clark welcomes orthopedic surgeon Dr. Paul A. Marchetto back to the Training Station Gym for a round of core exercises.

More tip videos:

Exercises to strengthen the leg after an ACL injury

Effects of ACL injuries and treatment

The math behind tired marathon legs

Why chains help in bench press exercises

Don't be intimidated by cable-pulley machines

A solution for your pull-up problem

Getting the most from bench press machines

Ab workouts that protect your back

Lunges minus the knee pain