Our data suggest that jockeys have a high injury rate. Efforts are needed to reduce the number of potential injury events on the track and to improve protective equipment so events do not lead to injury.

Twelve female age-group swimmers and twelve female controls, aged ten to sixteen, performed a pre-training discontinuous maximal cycle ergometer test to determine the capacities of their anaerobic (alactacid and lactacid) and aerobic energy systems. Heart rate and oxygen uptake were determined during rest, exercise, and recovery. Blood samples were collected before and after exercise for determination of blood lactic acid concentrations. Tests were readministered to both groups immediately following the swimmers' competitive season. It was concluded that female swimmers possess significantly superior oxygen transport systems as compared to the untrained controls and that this high level of aerobic fitness is maintained throughout their training programme.

It is recommended that two trials be administered and the best time used; if neither trial results in a time less than 10 seconds, one or two more trials should be administered. It is generally not necessary nor advantageous to administer more than four trials.