The ergonomic design aims to mitigate problems in the human/technology interface, and it is based on methodologies for usability evaluation, which are also applied during the product design. Among the interfaces which haves ergonomic demand stand out packages whose lack of usability can prejudice the User access to the product. The interest variables in this type of interface involving torque forces, as well as gender and age. The aim of this study is the evaluation and physical analysis of torque forces, manual activities in various simulated groups of Brazilian adults subjects, males and females and different age groups.The research will be experimental and involves 180 individuals (18-29 years = 30M and 30F; 30-55 years = 30M and 30F; over 55 years= 30M and 30F), using a torque transducer and other complementary instruments to collect data. The procedures are characterized by the simulation of opening activities of plastic soft drink bottles, and data analysis should be based on descriptive statistics, correlation and analysis of variance (ANOVA). The results are intended to understand the different performance of activities and their relation to gender, age, and the designs of products.
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