Abstract
The aim was investigate the time-course of cardiac autonomic response in men with incomplete cervical spinal cord injury (SCI) practitioners or not of physical exercise. Twenty men were separated into three groups: control group without SCI (CON; 28.3 ± 4.5 yrs; 178.4 ± 6.5 cm; 82.1 ± 6.8 kg; n=8), regularly engaged in strength training and low aerobic training; exercise group with cervical SCI (EG, 32.3 ± 4.5 yrs, 175.1 ± 5.3 cm, 73.6 ± 9.6 Kg; n=8) that practiced wheelchair rugby and sedentary group with cervical SCI (SG, 30.8 ± 5.3 yrs, 173.4 ± 10.1 cm, 69.7 ± 7.1 Kg; n=4) who did not practice physical exercise. Heart rate variability variables were calculated from ECG, in rest. CON showed high values compared to EG and SG of: standard deviation of R-R intervals (SDNN), proportion of adjacent R-R intervals differing by more than 50 ms, number of interval differences of successive NN intervals greater than 50 ms, root mean square of successive differences and the high-frequency spectral power. SDNN was significantly lower in EG compared to CON. changes in cardiac autonomic function could be noted in subjects with cervical SCI regularly engaged in an exercise program.
Highlights
A spinal cord injury (SCI) usually occurs with damage to any part of the spinal cord and/or nerves where displaced bone fragments, disc material, or ligaments bruise, which compromises spinal cord tissue (Nooijen et al, 2015; Saunders, Clarke, Tate, Forchheimer, & Krause, 2015)
Considering the importance of autonomic function and few studies with SCI found described in the literature, the purpose of this study was to investigated the time-course of cardiac autonomic responses in sedentary and in trained menwith or without incomplete cervical SCI
This study presents an evaluation of the timecourse of cardiac autonomic response achieved at rest in a small sample of men with and without incomplete cervical SCI
Summary
A spinal cord injury (SCI) usually occurs with damage to any part of the spinal cord and/or nerves where displaced bone fragments, disc material, or ligaments bruise, which compromises spinal cord tissue (Nooijen et al, 2015; Saunders, Clarke, Tate, Forchheimer, & Krause, 2015). This traumatic event can exacerbate the physical and physiologic debilities in the musculoskeletal, cardiovascular, gastrointestinal, pulmonary and integumentary systems leading to shake substantial financial burden on health care systems (Saunders et al, 2015). Health Sciences, v. 40, e33469, 2018 respectively (Biering-Sorensen, Bickenbach, El Masry, Officer, & von Groote, 2011; Krug, Sharma, & Lozano, 2000)
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