I noticed in Muay Thai fundamentals, in Regular Jab they tell to push heel of right foot, to get the extra range power from Orthodox. In Book "Muay Thai Basics: Introductory Thai Boxing Techniques" and many resources incl Silva and others
In Regular boxing they do not recommend leaning forward on regular jab. "Leaning too far back or forward can tip the balance" as heard from many coaches.
Is there a reason for the discrepancy? just curious, my theory is Boxing is much more jab punch heavy, so doing it continuously can cause balance issues. Any insight is good.