Fitness trackers are everywhere! You’ve seen them on your friends wrists, strangers wrist, and athlete’s wrists. Some are clipped to shirt sleeves and sneaker laces. You may ask yourself, “Do I need one of those to help me with my fitness...
Have you noticed that many of the different cardio machines have a Heart Rate Training Zone chart? That chart is a general guideline derived from the most basic of fitness calculations. The formula is a maximum heart rate of 220 minus your age and times a certain...
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