How to Stop Fitness App from Tracking Trends & Health Data in iCloud?

I want to stop the Fitness App from tracking my fitness trends and displaying cumulative data. I never asked for this function. I know how to change the Activity goals, so that’s not my concern. I never asked and do not want Apple tracking my fitness activity, level, etc. I understand that Apple says this data is encrypted and protected. Nevertheless, I never asked for Apple to save this information on their servers and make suggestions. I want my fitness activity saved on my iPhone or App,eWatch only, not in the cloud. I want the option to save my information on my personal device only. How do I turn off trends and Health information being saved to the cloud and instead have it saved on my iPhone only. My most important issue is the ability to have my fitness data saved on my iPhone or AppleWatch ONLY. I want none of my information in the cloud, except what I say can be there.