This blockbuster reality show has ignited passionate reactions from fitness professionals and the clients they serve.

Where do fitness professionals draw the line when it comes to dishing out diet and nutrition advice?

The 2009 IDEA Personal Training Programs & Equipment Trends report shows that training styles, equipment and choices have broadened to serve an ever-expanding, discriminating market.

Client Success Story: Jonathan Ross helps his client relish the fitness journey.

Profit Center: Help your clients reach the finish line and stay loyal to your business.

Ex Rx: High-intensity, short-duration interval workouts are a new frontier in fitness and sports training.

Group Ex Skills & Drills: Use these five tips to make yoga classes extra special.

Ignite: This mind-body-inspired warm-up will help pregnant participants connect to baby, lengthen muscles and release tension.

Class Take-Out: Combine the best of the outdoors and indoors with this “surf and turf” class.

Buzz: Students dance to video games and hang from the ceiling in these unique offerings.

The latest in nutrition news and science.

Nutrition: How diet can enhance physical performance in older athletes—from those who compete at a masters level to those who just want to improve their game.

Wellness news and research from around the world.

Inner IDEA: With its gentle, whole-body approach to recovery, Pilates is a good choice for clients with back pain.

Research: Is there something about marathoners that makes them physiologically and medically different?