Whether we like it or not, when it comes to things like movement quality (mobility, flexibility, stability), running shoe choice, and training volume or intensity, to name a few, each of us has our own "margin of error."
That margin tends to lessen as we get older, as the miles pile up, or if we'd had a previous injury.
What does it mean for you?
According to Merriam-Webster, the definition I'm referring to is: If you have little or no margin for / of error, it means that you need to be very careful not to make mistakes. If you have a greater margin for/of error, you can be less careful.
The principles are the same for everyone. Violate one of those principles, and you'll end up injured, sick, or over-trained. And frustrated.
One lesson I learned the hard way and am often reminded of, is...
...it's when we feel most bulletproof and resilient that we are, in fact, most vulnerable.
Vulnerable to something as frustrating as an injury or tweak at the worst possible time (such as right before an important race), or worse, long lasting irreparable damage to our body...
Do YOU KNOW what your margin of error is?