improve 1 per two week is doable.

来源: borisg 于 2024-10-03 07:27:41 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (149 bytes)

there is a limit you can reach. Trying to pass that point is hard because you are more likely to have injuries and it takes time to recover.

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