Comparison of Ground Reaction Forces between Combat Boots and Sports Shoes

It is unclear whether military shoes (combat boots and sports shoes) attenuate loading rate or affect force transfer during walking. Therefore, this study compared ground reaction forces (GRF) related to impact and force transfer between combat boots, military sports shoes, and running shoes. Ten army recruits walked over a walkway with two force plates embedded. GRF were measured when walking barefoot (for data normalisation) and with combat boots, military sports shoes, and running shoes. Loading rate, first and second peak forces, and push-off rate of force were computed along with temporal analysis of waveforms. Reduced loading rate was observed for the running shoe compared to the combat boot (p = 0.02; d = 0.98) and to the military sports shoe (p = 0.04; d = 0.92). The running shoe elicited a smaller second peak force than the combat boot (p < 0.01; d = 0.83). Walking with military shoes and combat boots led to larger force transfer than running shoes, potentially due to harder material used in midsole composition (i.e., styrene-butadiene rubber). Combat boots did not optimise load transmission and may lead, in a long-term perspective, to greater injury risk.

Mendesain Meja Dan Kursi Ergonomi Dengan Mengacu Pada Nilai Antropometri Untuk Bagian Checking Rubber (Outsole) Di PT. Victory Chingluh Indonesia

PT. Victory Chingluh Indonesia is a company engaged in the manufacture of sports shoes in collaboration with an American brand, namely Nike. From the results of the Nordic Body Map Questionnaire at the PPIC RH department of the checking ruber section, many workers have complaints in the muscles (musculoskeletal disorders) due to non-ergonomic workplaces as many as 20 workers or 64.5% feel pain in the high category, as many as 8 workers or 25, 8% felt pain in the moderate category, for the category of pain with very high intensity as many as 2 workers or 6.4% and 1 worker or 3.2% felt pain in the low category. From these results, it is necessary to take further action by making ergonomic designs of Working Furnitures (tables and chairs) with reference to anthropometric values. With this reference, we get a table design with a length of 133.6 cm using the 5th percentile, a table width of 66.8 cm with a 5th percentile and a table height of 63.2 and a chair design with a chair height of 41.2 cm with a 50th percentile. -, the width of the seat base is 40.5 cm with the 95th percentile, it is expected that workers who have a maximum hip width can use the chair, the length of the seat base is 37.8 cm with the 5th percentile, the height of the seat back is 54.5 cm with the 50th percentile th and the width of the seat backrest is 48.9 cm with the 95th percentile. Keywords: Ergonomics, Anthropometry, musculoskeletal disorders. Nordic body map, design

Improve Ramp-Up Performance on the Sewing Process in a Sports Shoe Factory Using 8-Disciplines and Lean Manufacturing

Purpose: The research aims to design a performance improvement framework for a new model of sports shoes to increase the ramp-up process time. Methodology/Approach: The approach used the problem-solving system of 8 disciplines, Single Minute Exchange Dies, Visual Management, and the Just In Time principle. Findings: By using the methods described above, the research findings will have a positive impact on the company. Model changeover time was reduced from 600 minutes to 102 minutes, and ramp-up time was reduced from 20 days to 2 days. Research Limitation/Implication: The limitation of this study was that only the CK2946 model was still done as a case study. The cost and other inhibiting factors were also not included in the discussion of this rump-up process. Originality/Value of paper: By integrating SMED, Just In Time, visual management, and using 8-Dicipline, the researcher developed a framework for improved performance for ramping up a new model of sports shoes.

Research on the Upgrading of China's Sports Shoes Manufacturing Enterprise Cluster from the Perspective of Global Value Chain Driving Force

The paper, based on the global value chain theory, this paper studies the sustainable development of China's sports shoes manufacturing industry cluster from the perspective of driving force. First, this paper reviews the relevant theories of global value chain. Then it studies the upgrading mode of sports shoes manufacturing enterprise cluster in China under the theoretical framework of global value chain. After theoretical analysis and empirical study, this paper puts forward the idea of upgrading the sports shoes manufacturing enterprise cluster in China. And finally, corresponding suggestions and countermeasures are put forward to provide a basis for the development of industrial clusters and the formulation of policies from the two dimensions of local and global.

Comparison of Ground Reaction Forces between Combat Boots and Sports Shoes

It is unclear whether military shoes (combat boots and sports shoes) attenuate loading rate or affect force transfer during walking. Therefore, this study compared ground reaction forces (GRF) related to impact and force transfer between combat boots, military sports shoes and running shoes. Ten army recruits walked over a walkway with two force plates embedded. GRF were measured when walking barefoot (for data normalization) and with combat boots, military sports shoes and running shoes. Loading rate, first and second peak forces and push-off rate of force were computed along with temporal analysis of waveforms. Reduced loading rate was observed for the running shoe compared to the combat boot (p = 0.02 and d = 0.98) and to the military sports shoe (p = 0.04 and d = 0.92). The running shoe elicited a smaller second peak force than the combat boot (p &lt; 0.01 and d = 0.83). Walking with military shoes and combat boots led to larger force transfer then running shoes potentially due to harder material used in midsole composition (i.e. styrene-butadiene rubber). These results could lead to a potentially larger risk of injuries while long duration walking in military shoes and boots compared to traditional running shoes.

Analisis Pengaruh Citra Merek, Kepercayaan Merek dan Kualitas Produk Terhadap Keputusan Pembelian Sepatu Specs (Studi Kasus Pada Konsumen Sepatu Specs Di Kota Lombok Timur)

This study aims to determine the effect of brand image, brand trust and product quality in influencing consumer purchasing decisions of specs brand sport shoes and also to determine wich factors have the greatest influence on consumer purchasing decisions of specs brand sports shoes. The study took a sample of 100 respondents to be examined using nonprobability sampling method and by using the incidental sampling technique. The data analisys used in this research is Multiple Linier Regression Analysis. Before the regression analysis was carried out, there were several stages of testing which were carried out, including the validity test and the reliability test. Then the classical assumption tests were carried out including normality test , multicolonierity test, heteroskedastisity test, individual parameter significance test (t-test), simultaneous significance test (F-test) and determination coefficient test (R2).

Usulan Peningkatan Efisiensi Keseimbangan Lini Dengan Value Stream Mapping Dan Yamazumi Chart Pada PT.PAI

PT. PAI is a footware company that produces sports shoes. The production process at PT. PAI, has a waste of 15.891%. To overcome the problems that occur, this study was conducted with the aim of identifying and proposing waste elimination. The method used is a lean manufacturing approach. One of the tools used is Value Stream Mapping (VSM) and Yamazumi Chart. The first stage to solve the problem is the identification of waste using the Waste Relationship Matrix (WRM), Waste Assessment Questionnaire (WAQ) and VALSAT. The second stage is carried out by designing the current Value Stream Mapping (VSM), designing the proposed improvements using the Yamazumi Chart to balance the production line and designing the Future VSM based on the results of the proposals that have been given. The result of identification using these tools is known that the biggest waste is waste in the process with a percentage of 15.891% followed by overproduction of 15.774%. Based on the calculation using VSM and Yamazumi Chart, elimination of waste can be done as much as 5.48%, reducing the number of workers by 32 people and reducing the number of work stations by 16 work stations

Biomechanical Aspects of the Static and Dynamic Patterns of the Feet of Runners with Plantar Fasciitis and Their Relationship with Sports Shoes

The purpose of this literature review was to evaluate studies that have investigated static and dynamic biomechanical patterns of the feet in runners with plantar fasciitis, as well as their relationship with sports shoes and insoles prescription. Original articles with different design on this theme were considered. In general, the increase plantar load rates in runners with plantar fasciitis may be directly related to changes in the plantar arch (elevated) and the rearfoot alignment in pronation, as well as the effect of shoes or insoles to reduce heel pain. In summary, the clinical support of the literature review was showed that a decrease in the medial longitudinal arch induces greater mobility of the foot, which promotes a greater angle of rearfoot pronation to maintain the stability of the subtalar joint during static and dynamic feet support in activities, such as running. This results in a greater overload on the medial region of the calcaneus, producing greater stress on the plantar fascia, contributing to the development and progression of plantar fasciitis in runners. In addition, treatment of acute plantar fasciitis was associate to insoles while chronic phase associated for shoes ultra-flexible intermediate midsole for heel pain reduction and improvement foot biomechanics in runners with plantar fasciitis.

PENENTUAN WAKTU BAKU DALAM PENGECEKAN BONDING SAMPEL SEPATU PADA PT. CHING LUH INDONESIA

PT. Ching Luh Indonesia is a company engaged in the manufacturing industry that produces sports shoes with well-known global brands, with annual revenues of more than US $ 1 billion, and has 8,000 workers. PT. Ching Luh Indonesia is a company that is responsive to technological advances and pays great attention to the comfort of employees in working, especially in the Laboratory section. In that section, the bonding checking process on the shoe samples currently still uses direct checking without any time reference in each sample. This is considered less effective because it makes the addition of the remaining sample for the next shift. This study aims to determine the standard time of each shoe sample variant and to determine the number of samples received by each operator. From the research results using the calculation of the standard time can be determined the standard time of each variant of the shoe sample, so it can also be determined the number of samples received for each operator. By determining the standard time for each shoe sample, it is expected that each operator can complete each sample according to the predetermined standard time, so that the specified target can be achieved.. Keywords: Standard Time, Bonding, Shoe Samples, Laboratory, Operator