How to set the heart rate reminder below 150?

I can't set it because my heart rate is like this.

Open the sports health software, and then click My-Settings in the lower right corner to enter.

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After entering the settings page, find the sports settings option and click Open.

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Then click the exercise heart rate setting option under exercise settings to enter.

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Finally, click on the running category to open the heart rate ceiling reminder, and then click Select to confirm the heart rate ceiling that suits you, and the setting is successful.