On this point, why do we suppose in football that speed deteriorates with age, when 5 of the 8 olympic 100m finalists last year were aged 27-31?
I've always been curious as to why in football a young 21 year old is presumed to be faster than a 31 year old. Is it because football is a contact sport where injuries to the legs are more common, thus affecting acceleration? Has there been any research into this? Sprints in football are rarely 100m (more like 10-30m) and so perhaps acceleration is more important.
http://en.wikipedia.org/wiki/Athletics_at_the_2012_Summer_Olympics_–_Men's_100_metres#Final
Looking at this, the top 4 reaction times were all sprinters aged 27+, so that at least need not be a factor.
The comments by everyone on this page and the one previousy is FIF at its best. Good, technical discussion rather than needless negativity and thoughtless guff.
*waits for Trollace*