An appraisal of the SD _IR as an estimate of true individual differences in training responsiveness in parallel‐arm exercise randomized controlled trials

Calculating the standard deviation of individual responses (SDIR) is recommended for estimating the magnitude of individual differences in training responsiveness in parallel-arm exercise randomized controlled trials (RCTs). The purpose of this review article is to discuss potential limitations of parallel-arm exercise RCTs that may confound/complicate the interpretation of the SDIR. To provide context for this discussion, we define the sources...