Please choose the correct ending to complete the given sentence: Health: [header] How to find your resting heart rate [title] Choose the right time. [step] The formula for your resting heart rate is simple: it is the number of times your heart beats per minute while it is at rest. The key to calculating this rate is to make sure that you are actually at rest when you find your heart rate.

Ending1: It can take a long time to find your resting heart rate because you frequently do not have enough time to get a proper heart rate reading. One helpful place to begin is with an alarm clock. Ending2: Each medical test is based upon a " baseline " of your heart rate. Baseline reading roughly identifies the number of beats. Ending3: Try calculating your heart rate first thing in the morning. [substeps] One of the best times to find your resting heart rate is before you even get out of bed in the morning. Ending4: If your resting heart rate is lower than it is at rest, you can start to suspect that you have a heart condition. [substeps] You might be aware that you are going to be resting when you are doing something that keeps you awake, such as reading a book or listening to music.

Answer format: ending1/ending2/ending3/ending4