Why might your level of exercise and physical activity be socially determined

Which of the following is not a common cause for exercise related injury? a. overeating b. being dehydrated c. being active in an unsafe enviroment d. not wearing the proper clothes or protective gear

Which of these is a feature of audible pedestrian crosswalk signals? o a. pedestrian tracking o b. emergency instructions o c. button location signaling od. responses to voice commands

How could you find out if that advice is based in scientific evidence?