For example, we explain how to determine the most effective number of reps for you per body part. (lasting-weight-loss.com)
The exercise physiology textbook in my library, published in 1996, states, «Performing an exercise between 3 - RM (repetition maximum) and 12 - RM provides the most effective number of repetitions for increasing muscular strength.» (trainingscience.net)
The population statistics used in this study included Aa, Ae, Ho, He, and the inbreeding coefficient F. Aa represented the average number of alleles at each locus; Ae represented the average effective number of alleles at each locus; Ho is observed heterozygosity, while He is the expected heterozygosity if the population was randomly breeding. (cgejournal.biomedcentral.com)