This reminds me when I was stationed at Camp Pendleton, U.S. Marine Corps, 1st Marine, 1st BN., 1st Marine Division. I was there back in early 1980s and we did battalion hump, as we call it, all day long, back around 2200 hour. I know how tired these young Jietai soldiers are after 25km hump. But it is important to be trained as good foot soldier for future conflicts because foot soldiers are vitally important in winning the war. So keep up with your training and don't give up no matter how things get tough.