It'd be great to get some solid answers for this one it's really bugging me.
What makes more difference to muscle growth the number of reps at weight x or the weight itself?
Of course the more weight the less reps you can do and vise versa but do either have advantages or disadvantages in certain situations?
More importantly do they both tire and stress the muscle in the same way? In a scientific situation lifting a weight ten times is like lifting a weight half is weight twenty times, so surely they are both the same.
An odd one I know but the more I think of it the more it makes less scense to me.