ERA

Download the full-sized PDF of Increasing Calcaneal Plantar Flexion as a Method to Improve Weight Bearing Leg DorsiflexionDownload the full-sized PDF

Analytics

Share

Permanent link (DOI): https://doi.org/10.7939/R3QJ78C18

Download

Export to: EndNote  |  Zotero  |  Mendeley

Communities

This file is in the following communities:

Graduate Studies and Research, Faculty of

Collections

This file is in the following collections:

Theses and Dissertations

Increasing Calcaneal Plantar Flexion as a Method to Improve Weight Bearing Leg Dorsiflexion Open Access

Descriptions

Other title
Subject/Keyword
Glute-ham-gastroc raise
Gastrocnemius
Weight bearing dorsiflexion
Calcaneal plantar flexion
Plantar aponeurosis
Leg dorsiflexion
Weight bearing lunge test
Plantar intrinsic muscles
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
vonGaza, Gabriella L
Supervisor and department
Chiu, Loren (Physical Education and Recreation)
Examining committee member and department
Carey, Jason (Engineering)
Rouhani, Hossein (Engineering)
Department
Physical Education and Recreation
Specialization

Date accepted
2017-09-28T15:04:07Z
Graduation date
2017-11:Fall 2017
Degree
Master of Science
Degree level
Master's
Abstract
Previous research on foot and ankle mechanics has shown that weight bearing leg dorsiflexion range of motion is positively correlated to calcaneal plantar flexion. The gastrocnemius muscle promotes while the plantar aponeurosis and plantar intrinsic muscles restrict calcaneal plantar flexion. Thus, reducing plantar aponeurosis and plantar intrinsic muscle tension while increasing gastrocnemius strength may improve weight bearing leg dorsiflexion range of motion. Twenty-seven participants with poor (< 25°) leg dorsiflexion were enrolled and randomly assigned to one of two six-week intervention groups. Group 1 (n = 14) performed self-massage and stretching of the plantar aponeurosis and plantar intrinsic muscles three days per week. Group 2 (n = 13) performed the same self-massage and stretching in addition to a modified glute-ham-gastroc raise exercise. The weight bearing lunge, the standard assessment for leg dorsiflexion, was assessed before and after the intervention. Additionally, force platforms and three-dimensional motion analysis were used to examine lower extremity kinetics and kinematics during a partial squat exercise, with ankle net joint moments, peak leg dorsiflexion and calcaneal plantar flexion being the primary movements of interest. In the weight bearing lunge, Group 1 improved their leg dorsiflexion by 3.7 ± 2.9° (Effect Size (ES) = 1.16) in the left and 4.2 ± 3.2° (ES = 1.25) in the right. Group 2 experienced greater increases in the left of 4.9 ± 4.4° (ES = 1.80) and 6.4 ± 3.7° for the right (ES = 1.51). In the partial squat, leg dorsiflexion increased -0.6 ± 3.2° for the left (ES = 0.15) and -1.0 ± 2.6° for the right (ES = 0.24) in Group 1, and -2.3 ± 4.2° for the left (ES = 0.55) and -2.1 ± 3.2° for the right (ES = 0.59) in Group 2. There were small increases in calcaneal plantar flexion where Group 1 increased -0.7 ± 2.6° in the left (ES = 0.25) and -0.2 ± 2.7° in the right (ES = 0.08), whereas Group 2 increased -0.3 ± 3.2° in the left (ES = 0.15) and -2.7 ± 6.2° in the right (ES = 0.64). These results suggest that plantar aponeurosis and plantar intrinsic muscle self-massage and stretching in combination with modified glute-ham-gastroc raise exercise could be an alternative to calf stretching to improve weight bearing leg dorsiflexion range of motion.
Language
English
DOI
doi:10.7939/R3QJ78C18
Rights
This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for the purpose of private, scholarly or scientific research. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
Citation for previous publication

File Details

Date Uploaded
Date Modified
2017-09-28T21:04:08.312+00:00
Audit Status
Audits have not yet been run on this file.
Characterization
File format: pdf (PDF/A)
Mime type: application/pdf
File size: 5421083
Last modified: 2017:11:08 18:11:07-07:00
Filename: vonGaza_Gabriella_L_201709_MSc.pdf
Original checksum: 8f4754e74fed7603ea544fb3592b17c8
Activity of users you follow
User Activity Date