Knee-ankle muscle strength and performance tests in pes planus

NewsBot · Jul 16, 2022

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The relationship between knee-ankle muscle strength and performance tests in young female adults with flexible pes planus
Serkan Bakırhan, Nuray Elibol, Mehmet Özkeskin & Fatih Özden
Bulletin of Faculty of Physical Therapy volume 26, Article number: 4 (2021)

Background
A decrease in muscular activation of the knee and ankle is one of the primary reasons for pes planus. The muscle strength of the knee and ankle in patients with pes planus may affect the performance tests which consists of daily life activities. The aim of the study was to determine the relationship between knee and ankle muscle strength with performance tests in young female adults with flexible pes planus. In addition, we also aimed to observe whether the severity of pes planus affects the ankle muscle strength and performance test scores. We carried out a cross-sectional single-center study. The muscle strength measurement of knee flexion-extension, ankle dorsal-plantar flexion, and ankle inversion-eversion movements were evaluated with the manual muscle test (MMT) device. The timed up and go test (TUG), 5-repeat sit-and-stand test (5STS), and 10-m walk test (10MWT) were used to evaluate knee and ankle performance.

Results
A significant difference was found only for the five-repetitive sit-and-stand test among the classified groups considering the pes planus grade (p < 0.05). There was no significant difference between groups for other parameters (p > 0.05). In correlation analysis, there was only a relationship between the timed up and go test (TUG) with left foot dorsal flexor muscle strength and between 10-m walk test (10MWT) with right foot invertor muscle strength (r1 = − 0.288, r2 = − 0.288, p < 0.05).

Conclusions
The results of this study reveal that the duration of 5STS was significantly lower in the second degree pes planus group. TUG test score showed low negative correlation with left foot dorsal flexor muscle strength. In addition, the scores of 10MWT exhibited poor negative correlation with right foot invertor muscle strength. Regarding other parameters, no significant correlations were found.
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NewsBot · Jul 16, 2022

Related Thread:
Walking and Running Require Greater Effort from Ankle than Knee Extensor Muscles

NewsBot · Oct 21, 2022

The effect of isokinetic hip muscle strength on
normal medial longitudinal arch feet and pes planus
Fayez Alahmri et al
JOURNAL of MEDICINE and LIFE. VOL: 15 ISSUE: 9 SEPTEMBER 2022

Pes planus is a common foot and ankle physiologic deformity. The normal medial longitudinal arch is depressed or
flattened due to a lack of strength in associated muscles, ligaments, and tendons. This study aimed to investigate how
isokinetic hip muscular strength affected normal medial longitudinal arch feet and pea planus. Forty adult subjects
participated in this study: 20 with pea planus and 20 with normal medial longitudinal arched feet. Both groups were
similar in age (p=.074), weight (p=.324), height (p=.211), and BMI (p=.541). The navicular drop test determined
the differences in navicular height. An isokinetic dynamometer was used to determine hip muscular strength (peak
torque and total work) during hip flexion, extension, abduction, and adduction at speeds of 90°/s and 180°/s. A
Kruskal-Wallis test was computed to determine the comparison between the normal medial longitudinal arch and
pea planus. Subjects with normal medial longitudinal arch had more muscle strength than pes planus. Hip muscle
strength did not show any significant difference between both groups. The abductor and adductor group muscles'
total work were higher in subjects with pes planus. This study showed that normal medial longitudinal arched foot subjects have higher muscle strength than pes planus. However, the hip abductors were significantly lower in pes planus after
measuring the total work, suggesting that individuals with pes planus are easily fatigued, possibly due to the overuse of
the muscles that compensate for any changes in lower limb alignment.
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