Testing for Fiber Dominance?

[FERCHCORE]

Are there any reliable ways to test how fast twitch dominant you are? There are various ways I’ve read online using percentage of 1RM, but I don’t know if they are accurate. Thanks.

[Christian_Thibaudeau]

Outside of biopsy there is no 100% reliable method.

You can use the 80% reps test.

It’s not perfect because training experience plays a big role. If you train mostly with low reps chances are that you will get fewer reps than if you are someone who typically train with higher reps.