Performance measures of NCAA baseball tryouts obtained from the new 60-yd run-shuttle.

The ability to accelerate, decelerate, and change directions quickly is a well-known asset to athletic performance. Determination of basic movement skills may be accomplished by timing the athlete's ability to move through a prescribed course. The purpose of this investigation was (a) to describe and compare 4 distinct segments of a new agility test called "JJ Shuttle," and (b) to describe the agility and kinetic factors obtained from young men (age 18-22 years) who were competing for a limited number of positions on the National Collegiate Athletic Association Division II team.

Kinetic energy factors in evaluation of athletes.

It is established that speed and agility are critical attributes of sports performance. Performance timing of runs during agility course testing can be used to estimate acceleration, speed, or quickness. The authors of this research effort also report the energy of motion, or kinetic energy of the athlete, which considers not only the speed but also the mass of the athlete.