Effects of body weight support and pedal stance width on joint loading during pinnacle trainer exercise

Yu Lin You, Su Ya Lee, Yi Jung Tsai, Cheng Feng Lin, Li Chieh Kuo, Fong Chin Su

Research output: Contribution to journalArticle

Abstract

Background: A pinnacle trainer is a stair climber that has a biplane exercise trajectory and an adjustable pedal stance width (PSW). A pinnacle trainer integrated with a body weight support (BWS) system can help overweight individuals or individuals with poor balance exercise safely by reducing excessive or improper joint loads, preventing training-related injuries. However, few studies have investigated the biomechanical features of the lower extremities during pinnacle trainer exercise with and without partial BWS for various PSWs. Research question: We aimed to investigate the effects of partial BWS and PSW on the joint loading of the lower extremities during stepping on a pinnacle trainer. Methods: Seventeen healthy adults exercised on the pinnacle trainer with or without BWS using various PSWs. The joint resultant forces and joint moments of the lower extremities were calculated according to the kinematic and kinetic data measured via a motion capture system and force transducers on the pedals, respectively. Results: The joint resultant forces and joint moments of the lower extremities significantly decreased with increasing percentage of BWS. The internal knee adduction moment and internal hip abduction moment significantly increased with increasing PSW. For every kilogram of BWS, the joint loading of the lower extremities decreased by approximately 1% of the joint resultant forces of body weight during exercise with the pinnacle trainer. Significance: Exercise on the pinnacle trainer with partial BWS significantly reduced joint loading. Exercise with a wider pedal stance may be helpful for knee osteoarthritis rehabilitation as it produces greater internal hip abduction and internal knee adduction moments.

Original languageEnglish
Pages (from-to)45-52
Number of pages8
JournalGait and Posture
Volume74
DOIs
Publication statusPublished - 2019 Oct

Fingerprint

Foot
Joints
Body Weight
Exercise
Lower Extremity
Hip
Knee
Knee Osteoarthritis
Transducers
Biomechanical Phenomena
Rehabilitation
Wounds and Injuries
Research

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Orthopedics and Sports Medicine
  • Rehabilitation

Cite this

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title = "Effects of body weight support and pedal stance width on joint loading during pinnacle trainer exercise",
abstract = "Background: A pinnacle trainer is a stair climber that has a biplane exercise trajectory and an adjustable pedal stance width (PSW). A pinnacle trainer integrated with a body weight support (BWS) system can help overweight individuals or individuals with poor balance exercise safely by reducing excessive or improper joint loads, preventing training-related injuries. However, few studies have investigated the biomechanical features of the lower extremities during pinnacle trainer exercise with and without partial BWS for various PSWs. Research question: We aimed to investigate the effects of partial BWS and PSW on the joint loading of the lower extremities during stepping on a pinnacle trainer. Methods: Seventeen healthy adults exercised on the pinnacle trainer with or without BWS using various PSWs. The joint resultant forces and joint moments of the lower extremities were calculated according to the kinematic and kinetic data measured via a motion capture system and force transducers on the pedals, respectively. Results: The joint resultant forces and joint moments of the lower extremities significantly decreased with increasing percentage of BWS. The internal knee adduction moment and internal hip abduction moment significantly increased with increasing PSW. For every kilogram of BWS, the joint loading of the lower extremities decreased by approximately 1{\%} of the joint resultant forces of body weight during exercise with the pinnacle trainer. Significance: Exercise on the pinnacle trainer with partial BWS significantly reduced joint loading. Exercise with a wider pedal stance may be helpful for knee osteoarthritis rehabilitation as it produces greater internal hip abduction and internal knee adduction moments.",
author = "You, {Yu Lin} and Lee, {Su Ya} and Tsai, {Yi Jung} and Lin, {Cheng Feng} and Kuo, {Li Chieh} and Su, {Fong Chin}",
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Effects of body weight support and pedal stance width on joint loading during pinnacle trainer exercise. / You, Yu Lin; Lee, Su Ya; Tsai, Yi Jung; Lin, Cheng Feng; Kuo, Li Chieh; Su, Fong Chin.

In: Gait and Posture, Vol. 74, 10.2019, p. 45-52.

Research output: Contribution to journalArticle

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AU - Su, Fong Chin

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