On flat terrain wheelchairs are more efficient over long distances than running One of my favourite childhood traditions was poring over the yearly Guinness Book of World Records. It is always interesting to see all the weird and wonderful things humans are capable of. Here's some of the amazing feats accomplished by wheelchair users all over the world. Check out these 20 official Guinness World Records held by people who are truly pushing the limits of what can be done in a wheelchair. Longest Continuous Wheelie in a Wheelchair (25.8 km) The record for longest continuous wheelie in a wheelchair goes to Xie Junwu of China. He covered a distance of 25.8 km (16.03 miles)…