AAL, Automated Anatomical Labeling; ACR, American College of Rheumatology; CNS, central nervous system; CPM, conditioned pain modulation; EIH, exercise-induced hypoalgesia; Exercise induced hypoalgesia; Exercise intervention; FD, Frame-wise displacement; FEW, family-wise error; FIQ, Fibromyalgia Impact Questionnaire; FM, fibromyalgia; FOV, field of view; FWHM, full-width-half-maximum; Fibromyalgia; Functional connectivity; Functional magnetic resonance imaging (fMRI); GLM, general linear model; HADS, Hospital Anxiety and Depression Scale; HC, healthy controls; MNI, Montreal Neurological Institute; MVC, maximum voluntary contraction force; NSAIDs, non-steroidal anti-inflammatory drugs; P50, pressure stimuli corresponding to a pain rating of 50mm on a 100 mm VAS; PPI, psychophysiological interaction; PPTs, pressure pain thresholds; Pressure pain; RM, repetition maximum; SM, stimulation maximum; SPM, Statistical Parametric Mapping; T1, longitudinal relaxation time; T2, transverse relaxation time; TR/TE, time repetition/time echo; VAS, visual analogue scale; VOI, volume of interest; dlPFC, dorsolateral prefrontal cortex; fMRI, functional magnetic resonance imaging; rACC, rostral anterior cingulate cortex