Ergonomically, it is better to work bent toward the workspace. The Canadian Occupational Safety and Health (OSH) publishes information about the best welding position while sitting. If one draws a centroid line through the graphic, the inclination is 70⁰. The inclination of the workspace front of Sparky l is 70⁰. Sparky l follows best ergonomic practices as promulgated by OSH.
The United States recommends that workers avoid MSDs (with good ergonomics). United States Occupational and Health Administration says this about musculoskeletal disorders (which are caused by poor ergonomics):
Musculoskeletal disorders (MSDs) affect the muscles, nerves, and tendons. Work related MSDs (including those of the neck, upper extremities, and low back) are one of the leading causes of lost workday injury and illness. Workers in many different
industries and occupations can be exposed to risk factors at work, such as lifting heavy items, bending, reaching overhead, pushing and pulling heavy loads, working in awkward body postures and performing the same or similar tasks repetitively. Exposure to these known risk factors for MSDs increases a worker's risk of injury.