If the technology can be made safe, do healthy athletes have the right to engineer themselves like race cars to push the boundaries of achievement?

But eighteen healthy athletes were collapsing in front of their eyes.

For instance, it is possible for a healthy, muscular athlete with very low levels of body fat to be classified obese using this formula.

Doctors said it can be difficult to distinguish between abnormal hearts and the normal thickening of the heart that occurs in healthy competitive athletes.

They moved like a rigger and a healthy young athlete, not a librarian with a tendency to trip over her own feet, of course.

"Then we will have better, stronger - and healthier - athletes," she said.

Clinical studies show no compelling evidence that salbutamol and other β-agonists can increase performance in healthy athletes.

When an otherwise healthy young athlete suddenly dies during a game or a practice session, the cause is usually a heart problem, often a genetic abnormality.

Although heat stroke mainly affects people over age 50, it also takes a toll on healthy young athletes.

What about those healthy athletes who engage in rock climbing, skiing, Rollerblading or other sports likely to result in injury?