Pain intensity. Mean values (± SEM) of pain intensity in (a) the active side of the shoulder and neck, (b) the inactive shoulder and neck, (c) the active forearm and wrist, and (d) the inactive forearm and wrist, rated on a visual analogue scale (VAS, mm) at baseline (0) and every 15 min throughout the 90 min office work task and 30 min recovery, in subjects that had consumed coffee before start (n = 19; open circles), and in subjects that had abstained from coffee consumption (n = 29; filled circles). The shaded area indicates the 90 min work task period.
Strøm et al. BMC Research Notes 2012 5:480 doi:10.1186/1756-0500-5-480