I'm not sure in what context you are being taught this, but the notion of training to block anything, especially a jab, is not really a Boxing concept. This sounds like a martial arts approach to Boxing, taught all too often, to the detriment of the art.
If you are using your hands or arms to block with, then you aren't using them to hit with, which means you are losing the fight. Professional or Amateur, the goal is constant attrition, either to score points or secure a KO. If you concern yourself with blocking or covering up then this invites your opponent to engage in an attacking flurry that will either rack up points, cause the ref to step in, or put you down - depending on the rules and the levels.
The first with the most is the best, thats the bottom line. Blocking and covering is a martial arts mentality, which in the Boxing arena will leave you second, and subsequently last. |