I know plenty of people who take HGH for performance enhancement. To say it can't means you have no clue whatsoever about it. It wouldn't have affected his skill, no, but his athletic being, definitely.
you know plenty of idiots then, HGH is the worst thing to take for performance enhancement, steroids would be a lot better.
seriously you have no clue what your talking about.
giving someone HGH wont make them any better at anything, in fact it is also likely to impair him, because a lot of his internal organs will me larger then normal, causing problems such as HGH gut (intestines being much larger than needed for his frame). Enlarged heart (can happen with steroids too), which can cause all sorts of problems.
this information is coming from a bodybuilder who reads up on such things on a daily basis, as well as nutrition, etc.
HGH will have made Messi slightly taller, but he won't be any stronger unless he was doing weights on a regular basis, which if he was less than 16 years of age when he took them, he wouldn't be allowed to do so in any proper gym.
Messi is good because of his natural talent and he has been at the best youth programme in the world since he was in nappies. Just look at all the players who have came through the programme, even the not so many famous cases, such as Mikel Arteta was in the same programme as Messi, and it does show, because he does show signs of class at times. Then you have all the much more famous players, xavi, iniesta, pique, fabregas, etc, etc.
Barcelona made him what he is today, combined with his natural talent.
Britain needs to learn from them and make a similar setup here in the UK, where kids as young as 5 are taken away from peer pressure, chav's, other kid's and have football drummed into them, as well as education at a boarding school programme such as barcelona's. It's better than the toerag's getting drunk every weekend and causing trouble.