Originally Posted by
Robert Santana
Experience has shown me that body composition changes, especially in the upper body musculature, are quite noticeable for most males when the deadlift breaks 400 for 5 repetitions. I don't have a p value if that's what you are looking for but I will say that objectively it is more than 2.5x the lean mass of most novice men, which could help explain my observation. The muscle gaining side effect of getting stronger becomes more apparent in the upper body when the deadlift gets appreciably heavy.