Intrinsic foot muscle volume in experienced runners with and without chronic plantar fasciitis

Cheung, Roy T.H.; Sze, L.; Mok, Nicola W.; Ng, Gabriel Y.F.

doi:10.1016/j.jsams.2015.11.004

Cited by 59 publications

(56 citation statements)

References 20 publications

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“…When comparing between individuals/populations, differences greater than 10% can be considered to exceed measurement error. In populations where IFM atrophy has been reported (chronic plantar heel pain [8], hallux valgus [9], chronic ankle instability [10] and diabetes [11]), our results could be used to identify changes over time e.g. post intervention.…”

Section: Discussionmentioning

confidence: 99%

“…Considering the importance of IFMs for optimal foot function, impairments of IFM structure and function have been implicated in lower limb pain and injury [7]. Cross-sectional studies demonstrate differences of IFMs between individuals with and without chronic plantar heel pain [8], hallux valgus [9], chronic ankle instability [10] and diabetes [11]. Thus, it is plausible that assessment and training of IFM function may contribute to effective management of individuals with lower limb disorders.…”

Section: Introductionmentioning

confidence: 99%

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Intrinsic foot muscle size can be measured reliably in weight bearing using ultrasound imaging

et al. 2019

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Background:The intrinsic foot muscles (IFMs) are important contributors to optimal foot function. While assessment of IFM morphology using ultrasound imaging in non-weight bearing has been established, this does not evaluate the foot in its primary functional position of weight bearing.Research Question: Is ultrasound imaging a reliable and clinically feasible method of measuring IFM morphology in weight bearing, do these measures differ to those from nonweight bearing and are they associated with participant characteristics?Methods: Ultrasound images were obtained by a single rater from twenty-four healthy participants on two occasions, one week apart. Images were taken in weight bearing (bilateral stance) and non-weight bearing (seated). Cross-sectional area and dorsoplantar thickness of the abductor hallucis muscle, and dorsoplantar thickness of the muscles of the first interstitium were measured from acquired images. A second rater also acquired images at the first session.Participant characteristics included age, height, weight, sex, foot posture and foot mobility. Results: Measurements of IFM morphology demonstrated high reliability within and betweentest sessions, as well as between raters (ICCs > 0.8). Our findings suggest that changes of 10-18% could be considered to exceed measurement error. Larger IFM size was related to larger body size (taller, heavier), foot posture (longer foot, higher arch, wider midfoot) and male sex.Significance: This study is the first to describe a reliable and clinically feasible method of measuring IFM morphology in weight bearing. These measurements could be used in future studies to assess IFM morphology in patient populations and to evaluate the effect of intervention. Body size and foot posture explained between 20 and 41% of the variance in measurements and should be considered when comparing IFM morphology between individuals. The establishment of reliable measurements in weight bearing provides a crucial step towards the future evaluation of IFM function using ultrasound imaging.3

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Intrinsic foot muscle size can be measured reliably in weight bearing using ultrasound imaging

et al. 2019

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“…The active and neural subsystems are important in maintaining standing balance and controlling body posture [3]. Impaired movement sense and reduced foot muscle strength increase walking variability, fall risk [4,5], and even sports-related injuries such as plantar fasciitis and chronic ankle instability (CAI) [6,7]. Therefore, many studies have focused on strengthening the foot core system to prevent foot injuries.…”

Section: Introductionmentioning

confidence: 99%

Acute Effects of High-Definition Transcranial Direct Current Stimulation on Foot Muscle Strength, Passive Ankle Kinesthesia, and Static Balance: A Pilot Study

et al. 2020

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This study aimed to examine the effects of single-session anodal high-definition transcranial direct current stimulation (HD-tDCS) on the strength of intrinsic foot muscles, passive ankle kinesthesia, and static balance. Methods: In this double-blinded self-controlled study, 14 healthy younger adults were asked to complete assessments of foot muscle strength, passive ankle kinesthesia, and static balance before and after a 20-minute session of either HD-tDCS or sham stimulation (i.e., control) at two visits separated by one week. Two-way repeated-measures analysis of variance was used to examine the effects of HD-tDCS on metatarsophalangeal joint flexor strength, toe flexor strength, the passive kinesthesia threshold of ankle joint, and the average sway velocity of the center of gravity. Results: All participants completed all study procedures and no side effects nor risk events were reported. Blinding was shown to be successful, with an overall accuracy of 35.7% in the guess of stimulation type (p = 0.347). No main effects of intervention, time, or their interaction were observed for foot muscle strength (p > 0.05). The average percent change in first-toe flexor strength following anodal HD-tDCS was 12.8 ± 24.2%, with 11 out of 14 participants showing an increase in strength, while the change following sham stimulation was 0.7 ± 17.3%, with 8 out of 14 participants showing an increase in strength. A main effect of time on the passive kinesthesia threshold of ankle inversion, dorsiflexion, and anteroposterior and medial-lateral average sway velocity of the center of gravity in one-leg standing with eyes closed was observed; these outcomes were reduced from pre to post stimulation (p < 0.05). No significant differences were observed for other variables between the two stimulation types. Conclusion: The results of this pilot study suggested that single-session HD-tDCS may improve the flexor strength of the first toe, although no statistically significant differences were observed between the anodal HD-tDCS and sham procedure groups. Additionally, passive ankle kinesthesia and static standing balance performance were improved from pre to post stimulation, but no significant differences were observed between the HD-tDCS and sham procedure groups. This may be potentially due to ceiling effects in this healthy cohort of a small sample size. Nevertheless, these preliminary findings may provide critical knowledge of optimal stimulation parameters, effect size, and power estimation of HD-tDCS for future trials aiming to confirm and expand the findings of this pilot study.

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“…The PF is a membrane that connects the heel bone and the toes, and has a thick structure with bonding strength. PF plays a complex role in the protection and support of the foot itself, and is also important for support of body weight [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Plantar Fasciitis: What Does the Evidence Show?

Roever¹

2016

Orthop Muscular Syst

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Intrinsic foot muscle volume in experienced runners with and without chronic plantar fasciitis

Cited by 59 publications

References 20 publications

Intrinsic foot muscle size can be measured reliably in weight bearing using ultrasound imaging

Intrinsic foot muscle size can be measured reliably in weight bearing using ultrasound imaging

Acute Effects of High-Definition Transcranial Direct Current Stimulation on Foot Muscle Strength, Passive Ankle Kinesthesia, and Static Balance: A Pilot Study

Plantar Fasciitis: What Does the Evidence Show?

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