title: Improved physical activity in patients treated for chronic pain by spinal cord stimulation.
abstract: The objective of this study was to objectively assess the physical activity of daily living in chronic pain patients treated with spinal cord stimulation (SCS). Changes in pain and spontaneous physical activity following SCS were evaluated under real life conditions. Five series of measurements were performed before the implant (baseline) and at one, three, six, and 12 months after the implantation of an SCS system. Compared to baseline values, physical activity increased consistently during the entire follow-up period. The time spent walking and standing was statistically increased after six months (p < 0.01) and the time spent lying decreased significantly (p < 0.001) at the same time. The average total walking distance increased up to 389% at 12 months, reaching statistical significance (p < 0.05) after three months. The stride length and the speed increased (p < 0.01) at all times. We conclude that the reduction in pain intensity due to SCS is associated with a progressive and sustained improvement in physical activity. j.
authors.affiliation: Anesthesia and Pain Management Services, Center for Neuromodulation EHC, Hospital of Morges, Morges;              Anesthesia Department, University Hospital, CHUV, Lausanne;              School of Engineering, Laboratory of Movement Analysis and Measurement, Swiss Federal Institute of Technology, Lausanne, Switzerland.
authors.forename: Eric
authors.initials: E
authors.lastname: Buchser
authors.forename: Anisoara
authors.initials: A
authors.lastname: Paraschiv-Ionescu
authors.forename: Anne
authors.initials: A
authors.lastname: Durrer
authors.forename: Blaise
authors.initials: B
authors.lastname: Depierraz
authors.forename: Kamiar
authors.initials: K
authors.lastname: Aminian
authors.forename: Bijan
authors.initials: B
authors.lastname: Najafi
authors.forename: Blaise
authors.initials: B
authors.lastname: Rutschmann