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Browsing by Subject "Walking recovery"

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    High intensity variable stepping training in persons with motor incomplete spinal cord injury: a case series
    (Lippincott, Williams & Wilkins, 2020-04-05) Holleran, Carey L.; Hennessey, Patrick W.; Leddy, Abigail L.; Mahtani, Gordhan B.; Brazg, Gabrielle; Schmit, Brian D.; Hornby, T. George; Physical Medicine and Rehabilitation, School of Medicine
    Background and Purpose: Previous data suggest that large amounts of high intensity stepping training in variable contexts (tasks and environments) may improve locomotor function, aerobic capacity and treadmill gait kinematics in individuals post-stroke. Whether similar training strategies are tolerated and efficacious for patients with other acute-onset neurological diagnoses, such as motor incomplete spinal cord injury (iSCI) is unknown, particularly with potentially greater, bilateral impairments. This case series evaluated the feasibility and preliminary short and long-term efficacy of high intensity variable stepping practice in ambulatory participants >1 year post-iSCI. Case Series Description: Four participants with iSCI (neurological levels C5-T3) completed up to 40 1-hr sessions over 3–4 months. Stepping training in variable contexts was performed at up to 85% maximum predicted heart rate, with feasibility measures of patient tolerance, total steps/session, and intensity of training. Clinical measures of locomotor function, balance, peak metabolic capacity and gait kinematics during graded treadmill assessments were performed at baseline and post-training, with >1 year follow-up. Outcomes: Participants completed 24–40 sessions over 8–15 weeks, averaging 2222±653 steps/session, with primary adverse events of fatigue and muscle soreness. Modest improvements in locomotor capacity where observed at post-training, with variable changes in lower extremity kinematics during treadmill walking. Discussion: High intensity, variable stepping training was feasible and tolerated by participants with iSCI although only modest gains in gait function or quality were observed. The utility of this intervention in patients with more profound impairments may be limited.
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    Influence of skill and exercise training parameters on locomotor recovery during stroke rehabilitation
    (Wolters Kluwer, 2016-12) Hornby, T. George; Moore, Jennifer L.; Lovell, Linda; Roth, Elliot J.; Physical Medicine and Rehabilitation, School of Medicine
    Purpose of review: Research findings from the fields of motor learning and exercise physiology suggest specific training parameters that can be manipulated during physical rehabilitation profoundly influence skilled task performance. This review details the rationale for some of these training variables and their application in selected intervention studies focused on improving walking function in patients poststroke. Recent findings: Basic and applied studies have shown that the amount, intensity, and variability of specific task practice applied during rehabilitation interventions can affect recovery of walking poststroke. Many studies detailing the effects of conventional, therapist, and mechanically assisted interventions may incorporate some of these training parameters but minimize others, and their relative contributions may influence walking outcomes. Specific patient factors, such as the stroke acuity and degree of impairments, appear to influence the relative contributions of these training variables, and different patient subgroups may benefit from greater emphasis on specific parameters. Summary: The present findings suggest these training parameters should be considered when evaluating or implementing physical interventions directed toward improving locomotor function poststroke. More work is needed to understand their optimal combinations to maximize walking outcomes in patients with different levels of impairment poststroke.
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    Taking the Next Step in Neurologic Rehabilitation: Contributions of Intensity and Variability of Stepping Tasks During Locomotor Training
    (Oxford University Press, 2025) Hornby, T. George; Moore, Jennifer; Holleran, Carey L.; Henderson, Christopher E.; Physical Medicine and Rehabilitation, School of Medicine
    Research over the past 20 years indicates the amount of task-specific walking practice provided to individuals with stroke, brain injury, or incomplete spinal cord injury can strongly influence walking recovery. However, more recent data suggest that attention toward 2 other training parameters, including the intensity and variability of walking practice, may maximize walking recovery and facilitate gains in non-walking outcomes. The combination of these training parameters represents a stark contrast from traditional strategies, and confusion regarding the potential benefits and perceived risks may limit their implementation in clinical practice. The purpose of this perspective is to delineate the evidence regarding the contributions of intensity and variability of locomotor training to improve mobility outcomes in individuals with acute-onset brain and spinal cord injury. The rationale and evidence supporting the utility of these training parameters in controlled laboratory settings is first described by integrating concepts in the field of neuroscience, motor learning, biomechanics, and exercise physiology into a rehabilitation intervention. Subsequently, the evidence supporting the efficacy of this paradigm is addressed, including discussions of some of the misconceptions regarding perceived negative consequences of these strategies in an effort to mitigate common clinical concerns. Finally, the utility of these strategies implemented during inpatient rehabilitation is delineated to facilitate a more comprehensive understanding of the feasibility and potential benefits early following neurologic injury. A greater understanding of how and why to integrate higher intensity, variable stepping practice will support therapists to take the next step to maximize mobility in the patients they serve.
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