Journal article
Low-frequency electrically induced exercise after spinal cord injury: Physiologic challenge to skeletal muscle and feasibility for long-term use
The journal of spinal cord medicine, Vol.47(6), pp.1026-1032
11/2024
DOI: 10.1080/10790268.2024.2338295
PMCID: PMC11533229
PMID: 38619192
Abstract
Skeletal muscle has traditionally been considered a "force generator": necessary for purposes of locomotion, but expendable for non-ambulators who use wheelchairs, such as people with a spinal cord injury (SCI). Active skeletal muscle plays an indispensable role in regulating systemic metabolic functions, even in people with paralysis, but because of severe osteoporosis, high tetanic muscle forces induced with high frequency electrical stimulation may be risky for some individuals. The purpose of this study was to compare the physiologic muscle properties incurred by two low force/low frequency repetitive stimulation protocols (1 and 3 Hz); and, to assess the acceptability of each protocol among people with SCI.
Ten individuals with chronic SCI (12.9 years) and 11 individuals without SCI (NonSCI) participated in the study. Participants received either 1 or 3 Hz stimulation to the quadriceps muscle on Day 1, then the converse on Day 2. Each session consisted of 1000 stimulus pulses.
The initial and maximum forces were similar for the 1 and 3 Hz frequencies. The fatigue index (FI) for SCI and NonSCI groups were lower (P < 0.007) for 3 Hz than for 1 Hz (0.34 ± 0.17 versus 0.65 ± 0.16 and 0.72 ± 0.14 versus 0.87 ± 0.07, respectively).
The 3 Hz stimulation offered the greatest physiological challenge and was perceived as more acceptable for long term use among people with SCI.
Details
- Title: Subtitle
- Low-frequency electrically induced exercise after spinal cord injury: Physiologic challenge to skeletal muscle and feasibility for long-term use
- Creators
- Michael A Petrie - Department of Physical Therapy and Rehabilitation Science, Carver College of Medicine, The University of Iowa, Iowa City, Iowa, USAShauna Dudley-Javoroski - Department of Physical Therapy and Rehabilitation Science, Carver College of Medicine, The University of Iowa, Iowa City, Iowa, USAKristin A Johnson - University of IowaJinhyun Lee - Department of Physical Therapy and Rehabilitation Science, Carver College of Medicine, The University of Iowa, Iowa City, Iowa, USAOlga Dubey - Department of Physical Therapy and Rehabilitation Science, Carver College of Medicine, The University of Iowa, Iowa City, Iowa, USARichard K Shields - Department of Physical Therapy and Rehabilitation Science, Carver College of Medicine, The University of Iowa, Iowa City, Iowa, USA
- Resource Type
- Journal article
- Publication Details
- The journal of spinal cord medicine, Vol.47(6), pp.1026-1032
- DOI
- 10.1080/10790268.2024.2338295
- PMID
- 38619192
- PMCID
- PMC11533229
- NLM abbreviation
- J Spinal Cord Med
- eISSN
- 2045-7723
- Grant note
- DOI: 10.13039/100009633, name: Eunice Kennedy Shriver National Institute of Child Health and Human Development, award: R01HD082109, R01HD084645
- Language
- English
- Electronic publication date
- 04/15/2024
- Date published
- 11/2024
- Academic Unit
- Orthopedics and Rehabilitation; Physical Therapy and Rehabilitation Science; Injury Prevention Research Center
- Record Identifier
- 9984586159102771
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