Objective Determination of Resistance Load for Ten Repetitions Maximum for Quadriceps Development

In this study 30 subjects were given five knee extension exercise bouts based upon 30, 35, 40, 45 and 50 per cent of their quadriceps strength as measured by tests with an aircraft tensiometer. On the basis of the number of repetitions produced at each percentage, it was concluded that a resistance load equal to 50 per cent was a reasonably satisfactory method of determining the amount of weight necessary for ten repetitions maximum.