You can edit your members' MHR in the Admin Portal's Myzone Users section.
To edit a member's MHR, you must be an 'Owner' or 'Coach' in your Myzone profile. If you are add this access level, check out the article How to Give Employees Access to Admin Portal.
NOTE: you must sign your GDPR Data Agreement in order to view and edit member details.
Step 1: Log into your Myzone account at http://owner.myzone.org and click Myzone Users.
Step 2: Type the member name into the search field. On the far right side, click the Edit icon. 
Step 3: Scroll down to Max HR and click in the box to edit.
You may also add a Limit HR to their profile. This field is often used when members are on medications that artificially limit how high people can increase their heart rate (such as beta-blockers) or if their doctor has ordered them not to exceed a certain heart rate. Filling in this field means that if the member exceeds their MHR during a workout, the system will not raise it.
Step 4: Save the edits for that member by clicking the green checkmark at the bottom of the page.
