Main results
FM
The 29% lower Participants in the FM group reported low moderate to heavy LTPA and failed to meet the WHO physical activity recommendation of 150 to 300 min of weekly moderate exercise [A few previous studies have reported exercise thresholds (ventilatory or lactate) in FM patients [The concept of maximal effort and the issue of possible submaximal effort in the FM group needs to be addressed. Maximal oxygen uptake (Although low HRThe FM patients had a pronounced, albeit not significantly different, circulatory response to increasing oxygen demand, which manifested as steeper ΔHR/ΔWe noted a possible association between the ability to reach maximal effort and FIQ and STAI-trait (Table 