A short bio about this guy explaining his experience and area of expertise, can be upto 3 lines.
Turning points that “force us to decide who we are and what we are capable of.” Share the turning point in your life and how it impacted you. Your readers will be moved by it. Moved, that is, to take action and join your gym.
What’s your purpose for coaching? Who are you impassioned to serve? State it clearly so your readers know whether or not you are the right coach for them. By the time your readers get to the end of your bio, they should be either hitting the back button because you’re the wrong coach for them, or signing up to join.