... gravity, in order to optimally balance the competing costs of stance and leg-swing work. Bipedal running Reduced gravity Leg swing Energetics Optimization Biomechanics Under normal circumstances, why do humans and animals select particular steady gaits from the myriad possibilities...

...Aleksandra V. Birn-Jeffery; Christian M. Hubicki; Yvonne Blum; Daniel Renjewski; Jonathan W. Hurst; Monica A. Daley Cursorial ground birds are paragons of bipedal running that span a 500-fold mass range from quail to ostrich. Here we investigate the task-level control priorities of cursorial birds...