Peter Attia· MD
as we age we don't just lose our balance uh but we're losing something else that people my age and certainly her age take for granted which is called reactivity um so the other day I was in the woods cuz one of my kids uh accidentally kicked the soccer ball down into the woods so I had to go and get it and as you can imagine the ground is very uneven right it's like it's you and it's covered in leaves and twigs and branches so you can't even see what you're stepping on i'm sure you can all picture exactly what this is like every step is a sprained ankle waiting to happen and sure enough at one point I step into something that wasn't as it appeared and I got jolted and I had to react very quickly with my leg to put it in the right place so I wouldn't fall and I did and I'm here sitting here talking about it and I don't even remember which leg it was that's how insignificant this was but the type of muscle fiber that was necessary to do that which if we want to get technical is called a 2A muscle fiber is the type of muscle fiber that is responsible for explosive movement it's the type of muscle fiber that is the most powerful muscle fiber well those muscle fibers start getting weaker and weaker and shrinking at about the age of 25