A change in eating patterns can markedly improve performance, said Dan Benardot, a sports nutritionist at Georgia State.

Molly Kimball, RD, a sports nutritionist at New Orleans' Ochsner Clinic, goes one better, encouraging her clients to share their exercise diaries with friends.

She hired a sports nutritionist to help her lose 24 pounds without losing strength.

Following the end of his modeling and football career, Salisbury became a sports nutritionist and is the author of The Transform Diet.

He went on to work as an International Sports Sciences Association-certified personal trainer and sports nutritionist in San Francisco, California.

An athletic trainer or sports nutritionist can help you learn ways to avoid overhydration.

He is also a certified sports nutritionist, champion bodybuilder, and international fitness model.

Lisa Dorfman, the sports nutritionist for the University of Miami who has done dozens of marathons, said there are at least three reasons why an athlete can hit a wall.

The club offers aerobics classes in addition to the usual exercise facilities, and employs a sports nutritionist who will pack healthy snacks for business travelers to take along on flights.

The British Dietetic Association also administers the specialist register for dietitians and sports nutritionists working with elite sportspeople, the SENr.