INTRODUCTION: Although the effects of carrying loads on gait biomechanics have been well-documented, to date, little evidence has been provided whether such loads may impact spatial and temporal gait asymmetries under the different foot regions. Therefore, the main purpose of the study was to examine the effects of carrying a standardized police equipment on spatiotemporal gait parameters. MATERIALS AND METHODS: In this population-based study, participants were 845 first-year police recruits (age: 21.2 ± 2.3 years; height: 178.1 ± 10.2 cm; weight: 78.4 ± 11.3 kg; body mass index: 24.7 ± 3.2 kg/m2; 609 men and 236 women; 72.1% men and 27.9% women) measured in 2 conditions: (i) "no load" and (ii) "a 3.5 kg load." Spatiotemporal gait parameters were derived from the FDM Zebris pressure platform. Asymmetry was calculated as (xright-xleft)/0.5*(xright + xleft)*100%, where "x" represented a given parameter being calculated and a value closer to 0 denoted greater symmetry. RESULTS: When compared to "no load" condition, a standardized 3.5 kg/7.7 lb load significantly increased asymmetries in spatial gait parameters as follows: gait phases of stance (mean diff. = 1.05), load response (mean diff. = 0.31), single limb support (mean diff. = 0.56), pre-swing (mean diff. = 0.22), and swing (mean diff. = 0.90) phase, while no significant asymmetries in foot rotation, step, and stride length were observed. For temporal gait parameters, we observed significant asymmetries in step time (mean diff. = -0.01), while no differences in cadence and gait speed were shown. CONCLUSIONS: The findings indicate that the additional load of 3.5 kg/7.7 lb is more likely to increase asymmetries in spatial gait cycle components, opposed to temporal parameters. Thus, external police load may have hazardous effects in increasing overall body asymmetry, which may lead to a higher injury risk and a decreased performance for completing specific everyday tasks.

• MeSH
• Biomechanical Phenomena physiology   MeSH
• Gait * physiology   MeSH
• Adult MeSH
• Humans MeSH
• Young Adult MeSH
• Police * statistics & numerical data   MeSH
• Weight-Bearing * physiology   MeSH
• Check Tag
• Adult MeSH
• Humans MeSH
• Young Adult MeSH
• Male MeSH
• Female MeSH
• Publication type
• Journal Article MeSH

Předkládaná studie se zabývá hodnocením zatížení nohy při chů zi v bě žné obuvi a v obuvi typu MBT, tedy obuvi nestabilní konstrukce. Pro analýzu rozložení tlaku na úrovni interakce chodidla a stélky byl použit systém Pedar v kombinaci se synchronním videozáznamem krokového cyklu. Měření proběhlo u souboru 10 zdravých žen při chůzi na trenažéru rychlostí 5 a 7 km.h –1 . Sledovali jsme maximální tlak, maximální sílu působící ve vertikálním směru, maximální sílu ve vertikálním směru v oblasti pod patní kostí, trvání kroku a dobu kontaktu s podložkou. Obuv nestabilní konstrukce v námi definovaných podmínkách významně nezměnila distribuci tlaků na podložku v porovnání s běžnou sportovní obuví. V souvislosti se změnou rychlosti chůze se rozložení tlaku na plosce nohy mění. Bylo potvrzeno, že s rostoucí rychlostí roste maximální tlak, vertikální síla i síla pod patní kostí.

Our study investigates plantar pressure distribution in both conventional footwear and one type of footwear with unstable sole construction, namely MBT. For the analysis of pressure distribution between the foot and the insole, the Pedar system was utilized in combination with the synchronic video recording of the gait cycle. Our test group for measuring consisted of ten healthy female participants walking on the simulator with the velocity of 5 and 7 km.h –1 . The studied parameters were peak pressure, peak vertical forces, peak vertical forces under the heel bone, gait duration and the length of stance. Within the framework of our study, footwear with unstable sole construction in comparison to conventional footwear did not produce any significant redistribution of plantar pressures. Faster walking speeds initiated foot loading asymmetry on the foot sole. When walking speeds increased, peak pressure grew, vertical forces rose alongside the plantar pressures under the heel bone.

• MeSH
• Walking MeSH
• Humans MeSH
• Foot * physiology   MeSH
• Shoes * classification   MeSH
• Heel physiology   MeSH
• Weight-Bearing * physiology   MeSH
• Check Tag
• Humans MeSH
• Publication type
• Research Support, Non-U.S. Gov't MeSH

Introduction: Scoliosis influences the optimal posture of the human body. The effect on the gait cycle of this entity is of major interesting. Purpose: Young adults with moderate idiopathic scoliosis (MIS) present kinematic modifications regarding the convex or concave side of the body compared to healthy people. Aim was to identify these variations. Methods: A cohort of twenty young adults (group A) having MIS and a control group (B) of fifteen healthy individuals were submitted in 3-D gait analysis with direct linear transformation method. The parameters examined were concerning the displacement of the knee and the ankle joints on x, y and z axes. The gait cycle and the knee range of motion were examined. Results: Gait cycle in scoliosis patients showed increased duration compared to healthy people, p<0,05. Regarding side to side comparison of the lower extremities in scoliosis patients the following outcomes were identified: Knee and ankle joint displacement in the ipsilateral (convex) side was increased regarding sagittal axis (x), p<0,05. When compared both groups the following differences found, p<0,05: The knee joint in the ipsilateral side (group A) had increased mean (z) frontal displacement. In the controlateral side (concave) of group A had decreased mean sagittal displacement and increased mean frontal and mean vertical (y) displacement. The ankle joint in the ipsilateral side had increased mean sagittal and frontal displacement. In the controlateral side had increased mean frontal displacement. The knee range of motion during the phases of gait cycle in scoliosis patients was seriously reduced compared to control group, p<0,05. Discussion: Asymmetries observed amongst the lower extremities during the gait cycle of scoliosis patients. Also asymmetries observed in comparison to healthy people. Some of these asymmetries agree to other studies. A compensatory walking close to normal walking existed. These observations might prove to be helpful in treating the gait cycle of young adults with MIS.

• Keywords
• kolenní a hlezenní kloub,
• MeSH
• Video Recording MeSH
• Biomechanical Phenomena MeSH
• Gait physiology   MeSH
• Walking * physiology   statistics & numerical data   MeSH
• Adult MeSH
• Adaptation, Physiological MeSH
• Ankle Joint physiology   physiopathology   MeSH
• Knee Joint * physiology   physiopathology   MeSH
• Humans MeSH
• Young Adult MeSH
• Image Processing, Computer-Assisted MeSH
• Range of Motion, Articular MeSH
• Scoliosis * complications   physiopathology   MeSH
• Statistics as Topic MeSH
• Case-Control Studies MeSH
• Weight-Bearing MeSH
• Check Tag
• Adult MeSH
• Humans MeSH
• Young Adult MeSH
• Male MeSH
• Female MeSH