How correct is this ?

Slow Twitch and fast Twitch Depend on Tempo and Reps. Slow-medium speed develops Both slow and fast twitch muscles. Earlier It was myth that 8-12 + reps only activate slow twitch and doesnot activate fast twitch and no muscle growth But in reality WORKING OUT TILL FATIGUE activate both fast and slow twitch Irrespective of 8-12 rep range