Whats the point of spending hours in Zone 2 if its not going to give you a tangible performance boost, and how do we know its actually building resilience for high-intensity race surges, rather than just being a cop-out for people who cant handle the real intensity of Zone 5? I mean, lets be real, if youre not pushing yourself to the limit, are you even really training? And dont give me any of that its about building endurance nonsense, because Ive seen plenty of endurance athletes who can barely sprint to the nearest coffee shop, let alone actually win a race. So, whats the real science behind Zone 2, and how do we know its not just a myth perpetuated by coaches who want to make their athletes feel better about themselves?