Answer:
It is recommended to exercise an hour at a time because ligaments, joints, and muscles get weak after an hour of exercise which can increase the risk of injury.
The Hazard Communication Standard requires employers to disclose toxic and hazardous substances in workplaces. This is related to the Worker Protection Standard. Specifically, this requires unrestricted employee access to the Material Safety Data Sheet or equivalent, and appropriate training needed to understand health and safety risks.
