I would love automatic sync with MapMyFitness.
Automatic sync from MapMyRun to Training Peaks. I like the features in TP but don't want to manually enter in yet another system.
We would be happy to provide the team at MapMyFitness access to our API for uploading data. It usually works out better if the request comes from one of their users.
https://support.mapmyfitness.com/hc
Until then, there are a few options to keep from having to manually enter your workout data in to TrainingPeaks.
The Wahoo Fitness app will sync data to both TrainingPeaks and MapMyFitness.
https://itunes.apple.com/us/app/wahoo-fitness/id391599899?mt=8
https://play.google.com/store/apps/details?id=com.wahoofitness.fitness&hl=en
If you are an iPhone user, the MapMyFitness app can write data to Apple’s Health app. Once your workout data is in the Health app there are a few different apps that can then sync the data to TrainingPeaks
https://www.trainingpeaks.com/blog/how-to-use-trainingpeaks-with-your-apple-watch/