This universal principle focuses on the difference between external tissue loading & internal tissue capacity. In particular, your adaptation zone & max capacity line is not static. In fact, certain environmental influences and mood states can fluctuate this line and influences how much load your proximal hamstring tendon can take! Brodie talks through the chapter of his e-book and then chimes in at the end to mention the importance of your fight or flight mode and your rest & recover mode.   Click here to learn more about the PHT video course & to receive your 50% discount If you would like to learn more about having Brodie on your rehab team go to www.runsmarter.online  Or book a free 20-min physio chat here