Please add a feature inside the LT training app that will allow the user to rate the exertion level or difficulty of a particular set of reps within an exercise. For instance - if I log 12 reps at 50 lbs - I would then log the exertion level for that set - using 1-5 or 1-10 - so when that exercise comes back up in a future workout I will know whether or not I should increase weight.