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.
21 Minutes a Day â UK Health Department. In July 2011 the UK government updated its guidelines on exercise. The latest guidelines is that everyone should aim to get 150 minutes of exercise each week, which averages out at 21 1/2 minutes each day, or five 30 minute sessions, which is the general recommendation given.Part of the problem is that these guidelines still do not address lifestyle factors.1 Minutes a Day â UK Health Department. In July 2011 the UK government updated its guidelines on exercise. The latest guidelines is that everyone should aim to get 150 minutes of exercise each week, which averages out at 21 1/2 minutes each day, or five 30 minute sessions, which is the general recommendation given.