... influences workload placed on more proximal leg muscles, trailing leg mechanical output and step length. Joint work Push-off Walking Metabolic cost Inverse dynamics Extensor muscles spanning the ankle (i.e. plantarflexors) are a critical functional component of the human musculoskeletal...

... a wide range of heights. The kangaroo rats in this study reached maximal jump heights up to ∼9-times hip height. Net joint work increased significantly with jump height at the hip, knee and ankle, and decreased significantly at the metatarsal–phalangeal joint. The increase in net work generated by each...

..., high positive work is nevertheless done at the knee, indicating that modulation of joint work is not only dependent on the amount of work required but also the locomotor context. * Author for correspondence ( [email protected] ) Competing interests The authors declare no competing or financial...

... © 2015. Published by The Company of Biologists Ltd 2015 Highlighted article: Six degree-of-freedom (6DOF) analysis of hip–knee–ankle–foot better captures energy changes of the body during gait than conventional 3DOF joint work estimates, revealing increased work contributions from the hip...

...% for the ankle and ∼70% for the knee and hip (all P <0.05). Running on the uneven surface also affected the amount of positive and negative joint work done at the ankle ( Fig. 4 ). Positive ankle work decreased by 0.413 J kg −1 (22%) while negative ankle work decreased by 0.147 J kg −1 (18%; P =0.0001...

... their interpretation of the findings and read and approved the final manuscript. COMPETING INTERESTS No competing interests declared. 3 12 2012 15 7 2013 © 2013. Published by The Company of Biologists Ltd 2013 energetics joint work kinematics uneven terrain Humans...

..., mechanical energy was generated at the hip, knee and ankle, and the net work at each of these joints increased dramatically with speed ( P <0.05). The greatest increases in positive joint work occurred at the hip and ankle. During downhill running, mechanical energy was decreased in two main ways: goats...

... a drop in substrate height. Based on the reasoning outlined above, we expect the hip and knee to maintain similar mechanical performance as in level running,and the ankle and TMP to undergo rapid changes in kinematics, joint moments and joint work in response to altered limb loading following...