Now, the thickness of our muscle fiber for fast oxidative is higher than the thickness in our slow oxidative. And so these produce a slightly higher force than in the case of the slow oxidative. So we have a low diameter of muscle fiber in this case and a medium in this case. So that's why we produce a higher force. Now, if these muscles can last us hours, these muscles basically last us minutes. So these are the muscles that are used in long distance events such as running a marathon.