This research investigated the effect of the standing-workstation fixed height on various individuals with different measurements of anthropometry. Measurements of certain anthropometric and physiological parameters are carried out as the basis for the measurement of the body mass index ( BMI) and the determination of the maximum heart rate (HRmax) and aerobic capacity (VO2max) of the individual subject when conducting manual hacksaw cutting operations at a fixed height of 940 mm. Twenty subjects (S1 to S20) split the 2 mm thick 25 mm x 25 mm square tubing. In order to determine their expended energy (EE) and oxygen consumption rate (VO2), each subject carried out the cutting operation in 5 replicates and their physiological parameters during activities are measured. Bad design / layout of manually operated tools / equipment and their long-term use can lead to a lot of energy input with less work updating, causing early hand exhaustion and musculoskeletal condition linked to various hands and arms. The findings showed that
Subject S4 has a BMI of 20.76 kg / m2 and a maximum cutting rate of 5.33 stroke / s, while subject S8 has a minimum cutting rate of 0.92 stroke / s with a BMI of 23.39 kg / m2. The interaction between BMI, EE and Cutting Rate, with F = 827.54, P = 0.000, R2 = 0.967 and S = 1.749 units, was statistically important. VO2 (28.54 l / min) and VO2max (24.36 ml / min / kg), with the maximum EE value (2.94 kcal / min), were found in topic S11. The wear rates of 1.86 teeth / s and 9.55 teeth / s have the same energy cost (EE = 0.87 kcal / min), but 36.65 s (S18) and 10.89 s (S20) respectively have different cutting times. This may clarify in part that the excess of 25.76 s used by subject S18 during operation time is responsible for keeping approximately 7.7 teeth intact with regard to the instrument. Administration. In the one-way study of variance, EE and Tool Wear Rate were statistically significant at 0.05 level (F = 45.87, P = 0.000, R2 = 54.69 percent and S = 1.617 units). The key contribution of this investigative study is that it serves as an eye opener to the dangerous impact on manual hack-sawing users of fixed-vice height, which many do not note. As the scope of the work did not address the field, areas of biomechanics need more attention to detailed knowledge.

Author (s) Details

Prof. Olusegun Gabriel Akanbi
Department of Industrial and Production Engineering, University of Ibadan, Ibadan, Nigeria.

Engr. Bukola Olanrewaju Afolabi
Department of Agricultural and Bio-Environmental Engineering, Federal College of Agriculture, Ibadan, Nigeria.

Omowumi Adegboye
Department of General Studies, Federal College of Agriculture, Ibadan, Nigeria.

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