Self-reported exertion levels in FSHD. 2A) During relative work, ratings of perceived exertion did not differ between people with FSHD and controls; 2B) The FSHD group had self-reported levels of breathlessness that were similar to controls, when working at a relative intensity (RPE, rating of perceived exertion; 40%, submaximal exercise at 40% of VO2peak; Peak, VO2peak; p>0.05 for both).