The FDA code requires that water supply systems include . • regularly spaced emergency shut off valves
• pipe and composed only of PVC or other plastic material
• A method of aerating the water at designated checkpoints
• A back flow or back siphonage prevention device

During the past few weeks or months, have you noticed any exercises that have become too easy for you? do you think you need to increase the intensity in any of the three exercise areas in your workouts? evaluate your exercise progress in the three exercise areas (cardiovascular, resistance, and flexibility) and list what modifications, if any, you may need to make in your exercise routine.