What do we do different between practice vs race? Personally, I don't change any methods. Perhaps the cells think "Oh, its a race, thats 1 of 100 charges" and when practicing "Oh, its not a race, we'll let him off 50% of the lifespan" LOL. I think not.
Manufacturers have to cover there behinds, so to say 100 charges does that. But in reality, they'll be good for plenty more than that.