Rucksack World Records  

William C. completed 91 sumo squats in two minutes while carrying a 100-pound rucksack on his back.

William C. climbed a five-step ladder two times in one minute while carrying a 100-pound rucksack.

William C. climbed a five-step ladder two times in one minute while carrying a 78-pound rucksack.

William C. reverse climbed a three-step ladder four times in one minute while carrying a 40-pound rucksack.