THIS STUDY ASSESSES THE EFFECTS OF ORTHOKINETIC SEGMENTS UPON THE MOTOR RESPONSES OF NORMAL MALE COLLEGE STUDENTS PERFORMING THE VERTICAL JUMP AND THE STANDING BROAD JUMP. THE VARIOUS PLACINGS OF THE ELASTIC AND INELASTIC FIELDS OF THE SEGMENTS UPON THE AGONIST AND ANTAGONIST THIGH MUSCLES OF STUDENTS WERE NOTED AND COMPARED WITH PERFORMANCE SCORES TO DETERMINE IF THE SEGMENTS FACILITATED, INHIBITED, OR FAILED TO SIGNIFICANTLY AFFECT PERFORMANCE. ORTHOKINETICS MAY ASSIST IN THE DEVELOPMENT OF COORDINATION AND MOTOR SKILLS BY EXTERNAL MEANS, AND IS A METHOD OF STUDYING THE NERVOUS SYSTEM OF THE LIVE ORGANISM. CONCEPTS OF THE NERVOUS SYSTEM, DERIVED FROM NEUROANATOMISTS AND NEUROPHYSIOLOGISTS, ARE RELATED TO ORTHOKINETICS. THE SAMPLE WAS DIVIDED INTO A CONTROL AND THREE TREATMENT GROUPS. MEASUREMENT TECHNIQUES AND STATISTICAL PROCEDURES ARE OUTLINED. NO IMMEDIATE DECISIVE EFFECTS OF THE SEGMENTS ON A NORMAL SUBJECT'S ABILITY IN EITHER THE VERTICAL JUMP OR STANDING BROAD JUMP WERE NOTED. LONGER EXPOSURE TO THE SEGMENTS MAY BE NECESSARY. A DISCUSSION OF THE RESULTS, INCLUDING A CONSIDERATION OF FACTORS INFLUENCING THE RESULTS, IS PROVIDED. (PS)