Journal
MUSCLE & NERVE
Volume 42, Issue 4, Pages 556-562Publisher
WILEY
DOI: 10.1002/mus.21736
Keywords
functional electrical stimulation; multi-pad electrode; muscle fatigue; low-frequency distributed stimulation; therapy
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Funding
- Ministry for Science and Technological Development of Serbia
- Danish National Research Council
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We present a low-frequency stimulation method via multi-pad electrodes for delaying muscle fatigue. We compared two protocols for muscle activation of the quadriceps in paraplegics. One protocol involved a large cathode at 30 HZ (HPR, high pulse-rate), and the other involved four smaller cathodes at 16 HZ (LPR, low pulse-rate). The treatment included 30-min daily sessions for 20 days. One leg was treated with the HPR protocol and the other with the LPR protocol. Knee-joint torque was measured before and after therapy to assess the time interval before the knee-joint torque decreased to 70% of the initial value. The HPR therapy provided greater increases in muscle endurance and force in prolonged training. Yet the LPR stimulation produced less muscle fatigue compared to the HPR stimulation. The results suggest that HPR is the favored protocol for training, and LPR is better suited for prolonged stimulation. Muscle Nerve 42: 556-562, 2010
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