A Novel Intrinsic Foot Muscle Strength Dynamometer Demonstrates Moderate-To-Excellent Reliability and Validity
# Background Intrinsic foot muscle (IFM) weakness can result in reduced foot function, making it crucial for clinicians to track IFM strength changes accurately. However, assessing IFM strength can be challenging for clinicians, as there is no clinically applicable direct measure of IFM strength th...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
North American Sports Medicine Institute
2023-08-01
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| Series: | International Journal of Sports Physical Therapy |
| Online Access: | https://doi.org/10.26603/001c.84310 |
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| _version_ | 1823857572954767360 |
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| author | Jennifer Xu Dante D Goss Susan A Saliba |
| author_facet | Jennifer Xu Dante D Goss Susan A Saliba |
| author_sort | Jennifer Xu |
| collection | DOAJ |
| description | # Background
Intrinsic foot muscle (IFM) weakness can result in reduced foot function, making it crucial for clinicians to track IFM strength changes accurately. However, assessing IFM strength can be challenging for clinicians, as there is no clinically applicable direct measure of IFM strength that has been shown to be reliable and valid with the foot on the ground.
# Purpose
The purpose was to investigate the intra-rater and inter-rater reliability of a novel, budget-friendly IFM dynamometer and determine its agreement with a handheld dynamometer (HHD). The researchers also examined correlations of foot morphology and activity level to IFM strength.
# Study design
Descriptive Laboratory Study
# Methods
Two assessors measured IFM strength of 34 healthy volunteers (4 male, 30 female; age=21.14±2.57, height=164.66 ±7.62 cm, mass=64.45±11.93 kg) on two occasions 6.62±0.78 days apart with the novel dynamometer to assess intra- and inter-rater reliability. The HHD was used to measure IFM in the first session in order to assess validity.
# Results
For the novel dynamometer, intra- and inter-rater reliability was moderate-to-excellent (ICC = 0.73 -- 0.95), and the majority of the strength tests were within the 95% limits of agreement with the HHD. Wider foot morphology and a higher number of days walking over the prior seven days had small but significant correlations with IFM strength (dominant foot r = 0.34, non-dominant foot r = 0.39; r = -0.33, -0.39 respectively).
# Conclusion
This novel IFM dynamometer is a budget-friendly (\$75) tool that was shown to be reliable and valid in a healthy population.
# Levels of evidence
Level 3 |
| format | Article |
| id | doaj-art-77bfe9a1c9fa4a28a61fe63039e17176 |
| institution | Kabale University |
| issn | 2159-2896 |
| language | English |
| publishDate | 2023-08-01 |
| publisher | North American Sports Medicine Institute |
| record_format | Article |
| series | International Journal of Sports Physical Therapy |
| spelling | doaj-art-77bfe9a1c9fa4a28a61fe63039e171762025-02-11T20:30:08ZengNorth American Sports Medicine InstituteInternational Journal of Sports Physical Therapy2159-28962023-08-01184A Novel Intrinsic Foot Muscle Strength Dynamometer Demonstrates Moderate-To-Excellent Reliability and ValidityJennifer XuDante D GossSusan A Saliba# Background Intrinsic foot muscle (IFM) weakness can result in reduced foot function, making it crucial for clinicians to track IFM strength changes accurately. However, assessing IFM strength can be challenging for clinicians, as there is no clinically applicable direct measure of IFM strength that has been shown to be reliable and valid with the foot on the ground. # Purpose The purpose was to investigate the intra-rater and inter-rater reliability of a novel, budget-friendly IFM dynamometer and determine its agreement with a handheld dynamometer (HHD). The researchers also examined correlations of foot morphology and activity level to IFM strength. # Study design Descriptive Laboratory Study # Methods Two assessors measured IFM strength of 34 healthy volunteers (4 male, 30 female; age=21.14±2.57, height=164.66 ±7.62 cm, mass=64.45±11.93 kg) on two occasions 6.62±0.78 days apart with the novel dynamometer to assess intra- and inter-rater reliability. The HHD was used to measure IFM in the first session in order to assess validity. # Results For the novel dynamometer, intra- and inter-rater reliability was moderate-to-excellent (ICC = 0.73 -- 0.95), and the majority of the strength tests were within the 95% limits of agreement with the HHD. Wider foot morphology and a higher number of days walking over the prior seven days had small but significant correlations with IFM strength (dominant foot r = 0.34, non-dominant foot r = 0.39; r = -0.33, -0.39 respectively). # Conclusion This novel IFM dynamometer is a budget-friendly (\$75) tool that was shown to be reliable and valid in a healthy population. # Levels of evidence Level 3https://doi.org/10.26603/001c.84310 |
| spellingShingle | Jennifer Xu Dante D Goss Susan A Saliba A Novel Intrinsic Foot Muscle Strength Dynamometer Demonstrates Moderate-To-Excellent Reliability and Validity International Journal of Sports Physical Therapy |
| title | A Novel Intrinsic Foot Muscle Strength Dynamometer Demonstrates Moderate-To-Excellent Reliability and Validity |
| title_full | A Novel Intrinsic Foot Muscle Strength Dynamometer Demonstrates Moderate-To-Excellent Reliability and Validity |
| title_fullStr | A Novel Intrinsic Foot Muscle Strength Dynamometer Demonstrates Moderate-To-Excellent Reliability and Validity |
| title_full_unstemmed | A Novel Intrinsic Foot Muscle Strength Dynamometer Demonstrates Moderate-To-Excellent Reliability and Validity |
| title_short | A Novel Intrinsic Foot Muscle Strength Dynamometer Demonstrates Moderate-To-Excellent Reliability and Validity |
| title_sort | novel intrinsic foot muscle strength dynamometer demonstrates moderate to excellent reliability and validity |
| url | https://doi.org/10.26603/001c.84310 |
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