When logging your workout results, you are able to leave notes on your results that can display on the leaderboard.

To add comments to your results open the Whiteboard > Log a result > Add Notes. You have to option to share on the Leaderboard or not. If you choose to share, you will also be able to share your notes on the workout as well. If you add notes and do not select to share to the leaderboard then they will only be visible to you (in your app) and to your coach not on the leaderboard.

Once you have everything logged and your notes finished, save your results.