Early this week FitnessSyncer released an update that allows for the syncing of additional Withings data to TrainingPeaks. FitnessSyncer has been syncing workouts to TrainingPeaks for a few years. Expanding that functionality to sleep, steps, etc. has been something that we have been discussing for a while, and we are very excited that this is now available for all TrainingPeaks users.
https://www.fitnesssyncer.com

FitnessSyncer has a both free and premium accounts. Below is a coupon for 1 month free. They are also running a 25% off sale on annual subscriptions until Jan 7, 2017.

Coupon for one month free:
https://www.fitnesssyncer.com/coupon?code=trainingpeaks1

We recommend reading through their FAQ page to get familiar with all the features.
https://www.fitnesssyncer.com/frequently-asked-questions

• Word of advice, make sure you set your timezone correctly in FitnessSyncer before syncing to TrainingPeaks. *

FitnessSyncer also provides mobile apps to sync data with Apple’s HealthKit and Samsung’s S Health app on Android. This data can then be sync’d to TrainingPeaks.