Feasibility of Remote High-Intensity Interval Exercise Training in People with Spinal Cord Injury: A Pilot Study

Purpose: Recent studies have shown that high-intensity interval training (HIIT) can improve cardiometabolic health in individuals with spinal cord injury (SCI); however, many barriers remain for individuals with spinal cord injury to participate in exercise such as lack of time, accessible equipment and facilities, and transportation. The use of telehealth interventions may be a form of exercise delivery that can ease the burden on the participant and lead to greater exercise participation. Thus, the purpose of this study was to determine the feasibility and efficacy of a home-based telehealth HIIT arm crank exercise training program for individuals with spinal cord injury. Methods: Participants were randomly assigned to 16 weeks of telehealth HIIT arm crank exercise training or a no-exercise control group. Body composition, resting energy expenditure (REE), blood lipids, insulin sensitivity, blood pressure, aerobic capacity (VO2 max), and a qualitative interview were assessed at baseline and at 16 weeks post intervention. Results: Six individuals (four male and two female, mean age 52.7 ± 10.2 years) with spinal cord injury were recruited for this study. Four out of five HIIT participants showed improvements in aerobic capacity, insulin sensitivity, and resting energy expenditure. Three qualitative themes emerged: (1) convenience and perceived benefits were critical elements of engagement; (2) high-intensity exercise elicited time-sensitive responses; and (3) trainers played a key role in promoting strong program adherence. Conclusions: Overall, we found that this program could be easily implemented and per-formed at home in individuals with spinal cord injury. We also found that participants enjoyed the 1:1 training sessions with a telecoach and that the intervention was easy to adhere to, as demonstrated by participant attendance. There is a need for future randomized controlled trials to determine the efficacy of telehealth exercise training for improving cardiometabolic health in spinal cord injury.