Active-Arm Passive-Leg Exercise Improves Cardiovascular Function in Spinal Cord Injury

Area of Science:

• Exercise Physiology
• Cardiovascular Health
• Spinal Cord Injury Rehabilitation

Background:

• Individuals with spinal cord injury (SCI) often experience impaired cardiorespiratory fitness and cardiovascular complications.
• Traditional exercise modalities may be inaccessible or ineffective for those with SCI.
• Active-arm passive-leg exercise (AAPLE) presents a potential alternative for improving physiological function.

Observation:

• A 43-year-old male with chronic T3 AIS A SCI participated in the study.
• Acute cardiorespiratory responses were compared between active upper-extremity exercise and combined active-arm passive-leg exercise (AAPLE).
• Responses to a 6-week AAPLE interval training intervention were assessed.

Findings:

• AAPLE demonstrated superior acute maximal cardiorespiratory responses compared to upper-extremity exercise alone.
• Six weeks of AAPLE interval training resulted in a 25% increase in peak oxygen uptake.
• Training led to a 10% increase in resting stroke volume and a 4-fold increase in brachial artery blood flow.
• No significant changes were observed in femoral arterial function, body composition, or bone mineral density.

Implications:

• AAPLE may be a clinically advantageous exercise intervention for individuals with SCI.
• The minimal setup, low cost, and lack of specialized equipment make AAPLE highly accessible.
• Further research can explore AAPLE's long-term effects and broader applicability in SCI rehabilitation.