If otherwise healthy, you should exercise to your maximum heart rate. True b. False b. You should exercise to your target heart rate, which is 60 to 90 percent of your maximum heart rate. To find your maximum heart rate, subtract your age from 220. When you begin an exercise program, you should aim for 60 percent of your maximum heart rate and gradually increase over a period of months.
New studies raise questions about the safety of cellular phones.
True b. False a. A recent study at the University of Washington found that rats exposed to microwave radiation suffered long-term memory loss and genetic mutations. None of the above d.