His 225 cap, as well as the 35% rule, is for flat back and round back goodmornings, and since he talks about using lighter loads for round back, the cap is really meant for flat back. In the book he doesn't differentiate between the two until after he's talked about the weight cap, and he never says anything like: "the previously mentioned cap applies only to round back." When I said he was talking about arched back, in an earlier post, I meant flat back - spine in extension.
The thing is, he mentions that in a goodmorning the weight is on the traps. He says that the fact that the weight is on the "neck"(traps) is what makes it dangerous. But, I would imagine most people who do heavy goodmornings use a low bar position, so maybe his comments aren't meant to apply to a low bar position goodmorning. Maybe he considers them to be a different exercise.
The thing is, he mentions that in a goodmorning the weight is on the traps. He says that the fact that the weight is on the "neck"(traps) is what makes it dangerous. But, I would imagine most people who do heavy goodmornings use a low bar position, so maybe his comments aren't meant to apply to a low bar position goodmorning. Maybe he considers them to be a different exercise.