My S Health feature in my phone no longer counts steps. How can I get it to start again?

[AC Question]

My S Health feature in my phone no longer counts steps. How can I get it to start again.

My Galaxy S5 has the app. I used to get step counting but for some reason the last reord I have was for 5/16. I don't kniow why it stopped but I cant get it to start. I have done all the update. So, what now?