Average recovery half-times of relative blood flow (rBF) (n
= 23, n
= 14), change in oxyhemoglobin concentration (Δ[HbO
]) and change in deoxyhemoglobin concentration (Δ[Hb]) (n
= 20, n
= 12) in subjects with fibromyalgia (FM) and healthy controls (HC) following arm cuff occlusion. The Student's t-test was used to compare the half-times between FM and healthy subjects. *P < 0.05; **P < 0.005.