Bicycle exercise training improves ambulation in patients with peripheral artery disease

Area of Science:

• Cardiovascular Diseases
• Exercise Physiology
• Rehabilitation Medicine

Background:

• Peripheral artery disease (PAD) with intermittent claudication (IC) significantly impairs mobility and quality of life.
• Exercise training is recommended, but optimal modalities and underlying mechanisms require further investigation.
• Understanding exercise effects on gait parameters and muscle physiology is crucial for effective patient management.

Purpose of the Study:

• To evaluate the effectiveness of a supervised bicycle exercise program on gait parameters and walking performance in PAD patients with IC.
• To assess changes in quality of life (QOL) and muscle characteristics following the intervention.
• To explore the potential of bicycle exercise as an alternative to walking for PAD patients.

Main Methods:

• Sixteen patients with PAD and IC underwent a 3-month supervised bicycle exercise program.
• Evaluations included ankle-brachial index, QOL questionnaires, near-infrared spectroscopy for calf oxygenation, and optical motion capture for kinematics and dynamics.
• Computed tomography was used to assess muscle cross-sectional areas before and after the intervention.

Main Results:

• Significant improvements were observed in IC distance, maximum walking distance, and all QOL scores.
• Hip range of motion, hip joint torque, gluteus maximus muscle tension, and hip joint work significantly decreased.
• Computed tomography revealed increased cross-sectional areas in abdominal, trunk, and thigh muscles, but not lower leg muscles.

Conclusions:

• Supervised bicycle exercise effectively improved QOL and walking distance in PAD patients with IC.
• The program led to beneficial changes in hip movement mechanics and increased trunk and thigh muscle mass.
• Bicycle exercise demonstrates potential as a valuable therapeutic option for PAD patients, comparable to walking interventions.