Intrinsic foot muscle volume in chronic plantar fasciitis

NewsBot · Nov 22, 2015

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Intrinsic foot muscle volume in experienced runners with and without chronic plantar fasciitis
RTH Cheung, L.K.Y. Sze, N.W. Mok, G.Y.F. Ng
Journal of Science and Medicine in Sport ; Article in Press

Objectives
Plantar fasciitis, a common injury in runners, has been speculated to be associated with weakness of the intrinsic foot muscles. A recent study reported that atrophy of the intrinsic forefoot muscles might contribute to plantar fasciitis by destabilizing the medial longitudinal arch. However, intrinsic foot muscle volume difference between individuals with plantar fasciitis and healthy counterparts remains unknown. This study examined the relationship of intrinsic foot muscle volume and incidence of plantar fasciitis.

Design
Case-control study

Methods
20 experienced (> = 5 years) runners were recruited. Ten of them had bilateral chronic (> = 2 years) plantar fasciitis while the others were healthy characteristics-matched runners. Intrinsic muscle volumes of the participants? right foot were scanned with a 1.5 T magnetic resonance system and segmented using established methods. Body-mass normalized intrinsic foot muscle volumes were compared between runners with and without chronic plantar fasciitis.

Results
There was significant greater rearfoot intrinsic muscle volume in healthy runners than runners with chronic plantar fasciitis (Cohen's d = 1.13; p = 0.023). A similar trend was also observed in the total intrinsic foot muscle volume but it did not reach a statistical significance (Cohen's d = 0.92; p = 0.056). Forefoot volume was similar between runners with and without plantar fasciitis.

Conclusions
These results suggest that atrophy of intrinsic foot muscles may be associated with symptoms of plantar fasciitis in runners. These findings may provide useful information in rehabilitation strategies of chronic plantar fasciitis.
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NewsBot · Nov 22, 2015

Related Topics:
Foot and hip stretching and strengthening for plantar fasciitis
Stretching or Strengthening for Plantar Fasciitis
Other threads tagged with plantar fasciitis

Craig Payne · Nov 23, 2015

Blogged about this study:
http://www.runresearchjunkie.com/intrinsic-muscle-strength-in-plantar-fasciitis/

NewsBot · Aug 22, 2017

The effect of additional activation of the plantar intrinsic foot muscles on foot dynamics during gait
Kazunori Okamura et al
The Foot 18 August 2017

What is already known
•The plantar intrinsic foot muscles contribute to the support of the medial longitudinal arch.
•The activities of the plantar intrinsic foot muscles increase with increasing gait velocity and ground reaction force.
•The relationship between the hypofunction of the plantar intrinsic foot muscles and plantar fasciitis has been suggested.
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What this study adds
•The additional activation of the plantar intrinsic foot muscles during gait caused a delay in the timing for the navicular height to reach the minimum value, and a reduction of the vertical ground reaction force (2nd peak).
•The plantar intrinsic foot muscles most likely contribute to shock absorption and facilitate efficient foot ground force transmission during gait.
•The failure of these functions may be related to plantar fasciitis.
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Background
The plantar intrinsic foot muscles (PIFMs) contribute to support the medial longitudinal arch. But the functional role of the PIFMs during dynamic activities is not clear. The purpose of this study was to examine the change in the foot dynamics during gait accompanied with the change in the PIFMs activity to determine the functional role of the PIFMs during gait.

Methods
Twenty healthy male subjects were randomly assigned to the electrical stimulation group (ESG) or control group (CG). In the ESG, the electrical stimulation to the PIFMs was provided from mid-stance to pre-swing using surface electrodes to simulate reinforcement of the PIFMs. The foot dynamics during the stance phase of gait was measured using a 3D motion analysis, and the amount of change from baseline (electrical stimulation was not provided) was compared between groups using an independent sample t-test.

Results
In the ESG, the timing for the navicular height to reach the minimum value was significantly later, and the vertical ground reaction force (2nd peak) significantly decreased more. There were no group differences in the amount of change from baseline on gait velocity, stance phase duration, minimum navicular height and ground reaction force in other directions.

Conclusion
Results from this study showed that the functions of the PIFMs most likely include shock absorption and facilitation of efficient foot ground force transmission during the stance phase of gait.
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NewsBot · Mar 29, 2022

Muscle Quality Assessment by Ultrasound Imaging of the Intrinsic Foot Muscles in Individuals with and without Plantar Fasciitis: A Case-Control Study
Lorena Canosa-Carro et al
Healthcare (Basel). 2022 Mar 14;10(3):526.

Objective: The primary aim of the present study was to compare the echo intensity (EI) and echovariation (EV) of the intrinsic foot muscles (IFMs) between individuals with and without plantar fasciitis (PF), using ultrasound imaging. The secondary objective was to study the intra-rater reliability of the echotexture variables.

Methods: A case-control study was conducted with 64 participants, who were divided into the following two groups: A, the PF group (n = 32); B, the healthy group (n = 32).

Results: The comparison between the two groups did not identify significant differences (p > 0.05) between the flexor hallucis brevis (FHB), flexor digitorum brevis (FDB), quadratus plantae (QP) and abductor hallucis brevis (AHB) variables for the EI and EV. Moreover, excellent intra-rater reliability was reported for the following ultrasound imaging EI variables: ABH (ICC = 0.951), FHB (ICC = 0.949), FDB (ICC = 0.981) and QP (ICC = 0.984).

Conclusions: The muscle quality assessment using the EI and EV variables did not identify differences in the FHB, FDB, AHB and QP muscles between individuals with and without PF through USI evaluation. The reliability of all the IFM measurements was reported to be excellent.
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NewsBot · May 3, 2022

Muscle Quality Assessment by Ultrasound Imaging of the
Intrinsic Foot Muscles in Individuals with and without Plantar
Fasciitis: A Case–Control Study
Lorena Canosa-Carro et al
Healthcare 2022, 10, 526.

Objective: The primary aim of the present study was to compare the echo intensity (EI) and
echovariation (EV) of the intrinsic foot muscles (IFMs) between individuals with and without plantar
fasciitis (PF), using ultrasound imaging. The secondary objective was to study the intra-rater reliability
of the echotexture variables. Methods: A case–control study was conducted with 64 participants,
who were divided into the following two groups: A, the PF group (n = 32); B, the healthy group
(n = 32). Results: The comparison between the two groups did not identify significant differences
(p > 0.05) between the flexor hallucis brevis (FHB), flexor digitorum brevis (FDB), quadratus plantae
(QP) and abductor hallucis brevis (AHB) variables for the EI and EV. Moreover, excellent intra-rater
reliability was reported for the following ultrasound imaging EI variables: ABH (ICC = 0.951), FHB
(ICC = 0.949), FDB (ICC = 0.981) and QP (ICC = 0.984). Conclusions: The muscle quality assessment
using the EI and EV variables did not identify differences in the FHB, FDB, AHB and QP muscles
between individuals with and without PF through USI evaluation. The reliability of all the IFM
measurements was reported to be excellent.
Click to expand...

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Craig Payne Moderator

NewsBot The Admin that posts the news.

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NewsBot The Admin that posts the news.

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