A complete Neanderthal was reconstructed using mostly La Ferrassie man as a base, but filling out some of his missing bits with some from Kebara 2. This was done by two Americans, Gary Sawyer (anthropologist) and Blaine Maley.
This reconstruction has lead to the observation that Neanderthals were very stumpy, and totally lacking in a waist. They also had wider hips, which would have made them pretty slow runners. The consensus now is that they probably didn’t run down their prey (endurance hunting), but attacked them up close with stabbing spears, which would account for the high number of serious injuries they sustained.
A reconstruction I saw of a Neanderthal inner ear suggested their sense of balance was a lot less developed than a modern humans. They probably didin’t get up to any gymnastics, and were poor runners.