Originally posted by Michael D
I have recently read that more tissue tearing occurs during negatives. A muscle tears more while being lengthened under tension than when being contracted under tension.
I read that years ago probably in a Weider mag, that the negative was the most important part of the rep, who knows.
I dont think anyone should feel obligated to stick to one routine, if you want to mix it up go for it, it provides a mental break if nothing more.