Flooring & matting. Where the feet hit the floor.
D006804:Ergonomics; D005221:Fatigue / Q000209:etiology / Q000517:prevention & control*; D005430:Floors and Floorcoverings; D005528:Foot / Q000503:physiopathology*; D006801:Humans; D009784:Occupational Diseases / Q000209:etiology / Q000517:prevention & control*; D016272:Occupational Health; D011187:Posture; D012775:Shoes; D014481:United States