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Fig. 1 | Arthritis Research & Therapy

Fig. 1

From: Pain sensitivity at rest and during muscle contraction in persons with rheumatoid arthritis: a substudy within the Physical Activity in Rheumatoid Arthritis 2010 study

Fig. 1

a and b Normalised pressure pain thresholds (PPTs) (mean ± SE) at the contracting (a) or distant resting (b) muscle at baseline, at the start of, in the middle of and at the end of a standardised contraction of m. quadriceps corresponding to 30% of maximum voluntary contraction force. Each PPT value was normalised and adjusted (by adding a coefficient) so that the baseline value always corresponds to 1. Values > 1.0 indicate higher PPTs during contraction (i.e., activation of exercise-induced hypoalgesia [EIH])

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