First post - hope its in the appropriate section.
Having some issues with deadlift form - I can hit a decent starting position (at least I think it is) but as you can see as soon as I initiate the lift, my pelvis posteriorly tilts pulling my lower back into a round, and I pitch fowards.
I'm thinking this is because of weak quads/tight hip flexors. Any advice? I don't think my glutes are especially weak, I feel a pump in them when doing squats/deads, they always feel very sore after squats especially and I can glute bridge with 100kg/220lbs comfortably. And I definitely feel my hammies working, so I think my posterior chain is fairly active.
This is 190kg/420lbs so almost double bodyweight, >95% 1rm.
Also, I feel a good pull in my hammies in the starting position, is this right or is this a sign that they could do with some mobility work?