This entire discussion is silly unless you practice sports on a professional level, which I'm sure almost no one here does.

"You won't be able to reach 100% of your athletic potential" Who in here ever had to give them all in an athletic competition? The easier answer would be:

No, you won't be able to reach the athletic capability you had before, which is irrelevant since you most likely never had to give your all in sports anyway, therefore you won't be able to tell the difference from you pre-LL best and post-LL best (considering your lengthening and recovery goes well).