When P and S waves hit the surface they transform into surface waves. P and S waves are signatures of fracture rock or earthquake. When a fracture occurs it sends energy out i â¦ n all directions. P, or primary wave is the initial large shock of the earthquake. This travels through anything.
Weekly Cardio Minimum. The Centers for Disease Control and Prevention recommend that all adults engage in at least 2 1/2 hours of moderate aerobic activity per week. If you do intense cardio, you can get away with half that time. You may spread your exercise over as many days of the week as you like, as long as each session lasts at least 10 minutes. In addition, the CDC recommends that all adults engage in some physical activity for 30 minutes a day, at least five days a week.
Or life to your years? Feeling your best boosts your zeal for life! The American Heart Association recommends at least 150-minutes of moderate activity each week. An easy way to remember this is 30 minutes at least 5 days a week, but three 10-minute periods of activity are as beneficial to your overall fitness as one 30-minute session. This is achievable! Physical activity may also help encourage you to spend some time outdoors.