Morphological and mechanical properties of lower limbs in competitive racewalkers: Associations with performance

Walker, Josh; Nicholson, Gareth; Hanley, Brian

doi:10.1016/j.jbiomech.2021.110802

Cited by 3 publications

(1 citation statement)

References 31 publications

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“…Participants underwent maximal isokinetic strength assessments of the knee extensors and flexors on the right and left limbs using an isokinetic dynamometer (System 4 Pro, Biodex Medical Systems: NY, USA). Participants were seated and positioned with the hip joint placed at approximately 90° (Walker et al, 2021 ). The shank was attached to the dynamometer lever arm above the medial malleolus and the center of the knee joint was aligned with the dynamometer's axis of rotation (Nicholson et al, 2016 ).…”

Section: Methodsmentioning

confidence: 99%

Inter-limb asymmetries and kicking limb preference in English premier league soccer players

Nicholson¹,

Bennett²,

Thomas³

et al. 2022

Front. Sports Act. Living

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The aims of this study were: (1) to quantify interlimb asymmetries in EPL soccer players in the context of kicking limb preference and (2) to establish the relationship between interlimb asymmetries and measures of physical performance. Twenty-two players (age: 21.8 ± 4.4 years) from an EPL club performed a running gait assessment (20 km/h) and unilateral countermovement jumps, a CoD assessment (modified 505 test), and an isokinetic knee extension/flexion protocol using each leg. Asymmetries were quantified using the percentage difference method and Pearson's correlations were used to quantify the association between variables. Players displayed the greatest level of asymmetry in isokinetic strength measures (5.9–12.7%) and lower levels of asymmetry in gait (1.6–7.7%), jump (0.9–7.0%) and CoD (1.9–3.5%) assessments. The influence of the preferred kicking limb was most evident in the isokinetic assessment with the players showing dominance in the preferred limb for knee flexor strength and in the non-preferred limb for knee extensor strength. These manifested in the asymmetry values calculated for the hamstring:quadricep (H:Q) ratios at 60°/s (8.80 ± 7.82%) and 240°/s (11.22 ± 7.04%) and in the functional H:Q ratio (12.67 ± 8.25%). The asymmetry values for peak extensor moment at 240°/s showed a significant correlation (ρ = −0.55, p = 0.034) with 10 m time in the CoD assessment. These findings provide benchmark asymmetry data for soccer practitioners and reveal that kicking limb preferences may bring about interlimb differences in the H:Q ratio which raises important considerations in the design of testing batteries and injury reduction interventions.

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Section: Methodsmentioning

confidence: 99%

Inter-limb asymmetries and kicking limb preference in English premier league soccer players

Nicholson¹,

Bennett²,

Thomas³

et al. 2022

Front. Sports Act. Living

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Potential Usefulness of Tracking Head Movement via a Wearable Device for Equilibrium Function Testing at Home

et al. 2022

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Many studies have reported the use of wearable devices to acquire biological data for the diagnosis and treatment of various diseases. Balance dysfunction, however, is difficult to evaluate in real time because the equilibrium function is conventionally examined using a stabilometer installed on the ground. Here, we used a wearable accelerometer that measures head motion to evaluate balance and examined whether it performs comparably to a conventional stabilometer. We constructed a simplified physical head-feet model that simultaneously records “head” motion measured using an attached wearable accelerometer and center-of-gravity motion at the “feet”, which is measured using an attached stabilometer. Total trajectory length (r = 0.818, p -false discovery rate [FDR] = 0.004) and outer peripheral area (r = 0.691, p -FDR = 0.026) values measured using the wearable device and stabilometer were significantly positively correlated. Root mean square area values were not significantly correlated with wearable device stabilometry but were comparable. These results indicate that wearable, widely available, non-medical devices may be used to assess balance outside the hospital setting, and new approaches for testing balance function should be considered.

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The Influence of Lower Limbs Morphology on the Result in Race Walking

Mijalković,

Đorđević,

Stanković

2024

SMB

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The aim of this study was to determine the influence of lower limbs morphology on the result in race walking. The sample of participants for this study was selected from the student population of Pirot's elementary school "Vuk Karadžić". The study included 15 male participants aged 13-14, who practiced race walking in the "Pirot" athletics club. The following variables were used to assess the morphological characteristics of the lower limbs: leg length, diameter of the knee joint, thigh circumference, calf circumference and thickness of the skinfold on the calf. On the other hand, the criterion variable was the 400 m race walking performance. Linear regression analysis was used to determine the influence of the morphology of the lower limbs on the result in race walking. The results of the study indicated that based on an observation of the modality as a whole, this study found no statistically significant influence of lower limbs morphology on the result in race walking. Nevertheless, by considering particular variables, it can be claimed that the diameter of the knee joint and the thickness of the skinfold on the calf have been shown to have a statistically significant influence on the result in 400 m race walking. Exploring the intricacies of lower limb structure in race walking can provide valuable insights for training and coaching. This understanding has the potential to improve coaching methods and enhance overall performance in this distinctive sport.

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Morphological and mechanical properties of lower limbs in competitive racewalkers: Associations with performance

Cited by 3 publications

References 31 publications

Inter-limb asymmetries and kicking limb preference in English premier league soccer players

Inter-limb asymmetries and kicking limb preference in English premier league soccer players

Potential Usefulness of Tracking Head Movement via a Wearable Device for Equilibrium Function Testing at Home

The Influence of Lower Limbs Morphology on the Result in Race Walking

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