Craft Engaging Fitness Data Book

I need a writer who can turn raw fitness concepts and numbers into a clear, engaging data-driven book. The goal is to show readers how to collect, interpret and act on their own workout stats, nutrition metrics and progress indicators so they can make smarter training decisions and stay motivated... (Budget: £250 - £750 GBP, Jobs: Content Writing, Creative Writing, Data Analysis, Editing, Fiction, Ghostwriting, Proofreading, Research, Technical Writing)