how?

Lets be serious for amoment, its all to dowith how the body reacts to the biomechanical chain of events taking place subsciously inthe peripheral senses, as the shoulder arm extend it triggers a response to the abdominal wall to contract to protect the spinal column and head from to much over rotation in other words protect the spine from injury.Everything has a purpose the body works all or nothing.The big toe has a major part to play in this process.

so ur tryin to say when ur training or boxing tense so u get used to it and itll be better cause u dont get winded

ye it prevents u from being winded but i find it makes u more relaxed which tends to conserve energy cus it takes energy just to stay tense