@keisan4 マラソン仕様のトレーニングには、90 rpm（1秒間に１回転半）くらいが最適らしいですよ。

Default Widget

This is Sidebar 1. You can edit the content that appears here by visiting your Widgets panel and modifying the current widgets in Sidebar 1. Or, if you want to be a true ninja, you can add your own content to this sidebar by using the appropriate hooks.