General Rule of Thumb: A tight muscle is a weak muscle.
I suspect you probably have two things going on. Your hamstrings are super weak and your glutes are shut down. So when you deadlift, your glutes are not contributing and your hamstrings have to pick up the slack. Since your hamstrings are weak, it kicks the crap out of them and you’re super sore afterwards.
Lots of mobility work, glute activation work, static stretching, and foam/tennis ball rolling will probably clear it right up. Lots of articles on this site to get you started… I definitely recommend “Feel Better for 10 Bucks” and “Get Your Ass In Gear.” [/quote]
Not sure I completely agree either of these statements.
A tight muscle is usually a weak muscle? I think it’s generally the other way around. And when we say “weak” we are referring specifically to the proportions in the individual I assume. Anyway, the “caveman” posture we often see on people who do way to much benching and not enough rowing is generally due to shortened (tight) internal rotators, pec minor, front delt, etc in the front of the body. This means that the muscles on the back are too weak to offer enough pull back in the opposite direction of the “caveman” posture.
The second issue I see is that you say his hamstrings are probably weak and his glutes are shut down. If that is the case, then what are the muscles that are working order to complete the lift (assuming technique is ideal). It’s not that I disagree with the glutes necessarily being shut down, but his soreness is likely due to his hamstrings taking the brunt of the work.
So while his hamstrings might be weak in terms of the absolute, (if he’s a beginner and only deadlifts 200 or whatever) we have to look at the body in terms of the strength of one muscle group in relation to another.
So your thoughts regarding whether or not his glutes are firing properly may be correct, but this would likely cause his hamstrings to be strongER than his glues, thus taking the brunt of the work
I don’t mean to split hairs on the second point, but those are just my thoughts.