“If you want great legs, you need to train them all around, not just the front of the thighs. Use multiple joints whenever possible. And running stairs is one of the best things you can possibly do. It has little to no impact on your joints, and you're working your glutes, hamstrings, and quads all at the same time.”

Canadian personal trainer, motivational speaker, and author

Harley Samuel Pasternak is a Canadian personal trainer, motivational speaker, and author. He is known for working with a range of celebrity clients and for co-hosting ABC's 2012 daytime talk show, The Revolution. His public profile is built around fitness and motivation. As a trainer, he has worked with well-known clients, and as an author and speaker he focuses on health, discipline, and practical advice for living well.