What substances weaken our bones?

Which term defines one's age as measured by how well the body is working? chronological age biological age social age mental age

Which of the following statements about communication is most accurate

Jamie is trying to become more active likes to run and lift weights but he feels the need to do more to get hidden burned up in work his heart doesn't have access to gym but has weights in living community with sidewalks can you come up with three different workouts for him that will him get into his target heart rate zone