Heart Rate Sensor Measurement Periods

Hello everyone, I am new to Swift and Xcode. I am currently making an application for iOS and watchOS to continiously measure the Heart Rate of the user (HR). The problem that I have encountered is that I do not understand how often does the sensor measure the HR.


On the official page from Apple (https://support.apple.com/en-us/HT204666) you can see that it says "Since Apple Watch takes these background readings based on your activity, the time between these measurements will vary." In my understanding it means that the sensor will show only the changes in the heart rate, which could be 1 second, 5 seconds or 1 minute depending on the user's activities.


So, my question is: "how to force the sensor to measure more frequently?"


I am currently implementing the application with Workout Session using Queries which allows me to read the data more frequently, but I still do not know how to manipulate that process. Is it possible at all? Where to find the information about measurement time periods of the sensor and workout mode differences in the measurement?


I would appreciate any help. Thanks in advance!