Greetings, I just wanted to cast a thought out there not just about oxygen debt but the payment thereof. Through some of my personal experience, I've tried paying my oxygen debt just before a major hill or incline as opposed to paying during and after. While approaching said hill I deepen and increase the frequency of my breaths and "flood?" my blood with extra available oxygen, it really buffers the breathlessness when powering up a hill. Its essentially hyperventilating but it does work .I've never seen anything written about "when" you can pay before or after, ever tried it? comments?