Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to calculate your body age [title] Find your resting pulse rate. [step] The heart is one of the body's most important organs, and a well conditioned and healthy heart is a big part of overall well-being. A normal heart usually beats at between 60-100 times per minute.

Ending1: Your own rate should ideally be no faster or slower than this when resting, though some elite athletes beat below 50 per minute. Place the first two fingers of your right hand on the inside of your left wrist just below your thumb, over one of your major arteries. Ending2: A healthy heart does not fluctuate a lot either and will not beat very high or drop to a rate that's far below what most health professionals recommend. [substeps] To rebalance your heart rate, try heart or anaerobic exercise to burn protein and support muscle growth. Ending3: If you have a heart problem, start counting in beats per minute. You can increase the rate to anywhere from 70 to 100 beats per minute (( the average heart rate for women is roughly 20-60 beats per minute). Ending4: However, if you are having a heart attack, there are ways to estimate your body's resting pulse rate more accurately. There are various ways to set the resting rate.

Answer format: ending1/ending2/ending3/ending4