That can mean physically, mentally, emotionally, spiritually, or whatever you wish to call it. At the end of the day, it is all interconnected and all aspects of your life should be impacted.
A rising tide lifts all boats.
These are principles you can use to become your own trainer and navigate both the football world and the rest of your life. These are tools to get you from where you are now to where you want to be.
Always look to what takes you back towards nature. Beware those that drag you to "complexity" and "sophistication" or the glitz and glamour of supposed superiority.
Simplicity is Nature's stage. She hides exponential complexity within almost absurd effortlessness. Man will never be able to reproduce or improve upon what Nature has already created.
Work with Nature and not against. Do what makes sense and works. Always take "the science" with a grain of salt and see if it lines up with reality.
All of this work wakes up your ability to think and see nonsense when it sprouts its head. That is a true skill, to discern the fluff from what's real. Use your mind and think.
Ultimately, become entangled and shrug off the countless pitfalls of mainstream thinking. Sidestep the bullshit and chase what matters: your highest potential!