Here are the first conceptional sketches about the user interface design.
The trainnig activity screen is shown if you start and training activity and remains visible until you explicitly leave the screen or finish your trainging.
This screen gives you a brief summary of your activity and let you choose if you want to delete or keep your activity for tracking your progress.
For rewieving details from previous training sessions you can switch from the session list to the activity session detail view. This screen includes serval tabs allowing you to navigate between certain detail information and a mapping of your running tack.