I was having the same trouble too today. My 1st workout I was given the opportunity to connect to MFP when my workout ended. Today, it automatically ended without me having to slide to end & went to the home page. When I checked MFP it didn't sync, so I disconnected the app & planned to reconnect only to have the same trouble....redirected me to Zen lab website. After much research it says you can only sync right after work out complete.