Couple things man but overall nice job.
1) when you get tired you tend to shoot your hips back instead of UP. Your knees shoot back quite a bit and you have that ‘good morning feel’. So, stay in your hips all the way up and keep your knees SOLID when you big the ascent. They will move back a BIT because of the hips leading out of the hole, but too much is not good.
2) lifting shoes and knee sleeves