Every day, the Valley's best-known trainers work with some of sports' biggest stars, who sweat it out alongside aspiring athletes and weekend warriors.
You might see Donovan McNabb, the winning quarterback in the NFC championship game. Or Curse-buster Curt Schilling of the Red Sox. Or NFL prospects preparing for the scouting combine.
Gyms require their personal trainers to be certified by one of a number of entities. But a person doesn't have to be certified to offer personal training advice. And many experts worry about what ideas, and what substances, might be passed along.
The limits are:Not to say that there are no obese players in the NFL, but the further their musculature is different from the norm, the less reliable BMI is as an indicator.
- It may overestimate body fat in athletes and others who have a muscular build.
- It may underestimate body fat in older persons and others who have lost muscle mass.
- Appropriate weight gain during pregnancy varies and depends upon initial body weight or BMI level. Pregnant women should contact a health professional to assure appropriate weight gain during pregnancy.
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posted by matteo at 2:10 PM on March 1, 2005