Great, fitness-focused domain name that blends in the words "gym" and "fantastic".
Gymtastic has nine characters and three syllables. Three syllable names are used by established brands like Sainsbury's, Santander and Verizon.
Gymtastic.com is a .com domain. Dot com domains are the most valuable domain extension in the world, famously used by websites like facebook.com. When you own a .com, it is much easier to rank for your own name in search engines.