Figure 2.

Standardized changes in acute heart rate (HR) and rate of perceived exertion (RPE) responses to three jump rope workouts (at 100, 120 and 140 rotations per min, rpm), and high-intensity intermittent running performance (V_IFT) after the training intervention. The changes are expressed as a factor of the smallest worthwhile change (SWC), which is based either on 1) the typical error of measurement of each variable (expressed as a CV), 2) a small standardized effect based on Cohen’s effect size principle (0.2 x between-athletes standard deviation, SD) or 3) the actual changes in HR and RPE response that relate to a small standardized (0.2 x between-athletes SD) change in V_IFT. *: likely change, **: very likely change and ***: almost certain change.