How to Maximize Your Workout  Follow these four steps to boost
your heart rate and get better results  By Abigail Cuffey  woman
walking on a treadmill  Photo by: Thinkstock  Special Offer
Before you exercise...  CALCULATE YOUR NUMBERS: First, figure
out your maximum predicted heart rate, or the highest it can
safely go, with a simple formula. Start with 220 and subtract
your age. Then, multiply the result by both 0.6 and 0.7 to get
your target heart rate zone. So, if you're 45, your target heart
rate is between 105 and 123 beats per minute. (220-45 = 175 x
0.6 = 105; 175 x 0.7 = 123.)  During exercise...  CHECK YOUR
HEART RATE: Find your pulse by placing two fingers on your wrist
at the base of your thumb. Count the number of beats in 30
seconds and then multiply that number by 2. This will give your
heart rate in beats per minute. If your heart rate is below the
target range, push yourself a bit harder (walk faster or do some
jumping jacks). If your heart rate is above the target range,
take the intensity d