PRISMA flow diagram of systematic search and studies included. a) included full-text original papers (reviews, letters, opinions, case report, book chapters were excluded); b) full-text manuscripts published in English; c) used an FRTD during exercise; d) used technology which provides mechanical (i.e., force, power or velocity) or muscle activation outputs (i.e., EMG) for the CON and ECC movement phases; e) published in a peer-reviewed journal; f) included only healthy adults as participants (> 18 years); g) used resistance training; and h) described the training intervention with the following specifications: FRTD equipment description, type of exercise, moment of inertia (i.e., external load), volume, and training intensity