At 310 I couldn't get off the ground. At 200 I dunked. Same person, same gym, different system.
I'm not a coach who read about this in a textbook. I spent years heavy, tried every version of "eat less, move more," and got nowhere until I stopped guessing and built something I could actually repeat on a bad week.
That's what you're buying. Not motivation. A plan that survives your real schedule, your real job, and the days you don't feel like it.