A. D. Kuo

Optimization of energy and time determines dynamic speeds for human walking

This study shows that human walking speed and duration are optimized by minimizing total energy and time costs, leading to dynamic speed trajectories with inverted U shapes.

Elastic energy savings and active energy cost in a simple model of running

This paper extends the Spring-mass model of running to include active muscles and dissipation, showing that active work accounts for most of the metabolic cost of running.

Soft tissue deformations explain most of the mechanical work variations of human walking

The paper shows that soft tissue deformations account for most variations in mechanical work during human walking, as predicted by a pendulum model.

The high energetic cost of rapid force development in cyclic muscle contraction

This study quantifies the metabolic cost of rapid force development in cyclic muscle contractions and finds it contributes significantly to energy expenditure.

TimTrack: A drift-free algorithm for estimating geometric muscle features from ultrasound images

TimTrack estimates geometric muscle features from ultrasound images without drift, showing accuracy comparable to state-of-the-art methods.

Human walking in the real world: Interactions between terrain type, gait parameters, and energy expenditure

This study quantifies how different outdoor terrains affect gait parameters, variability, and energy expenditure in humans using IMUs and oxygen consumption measurements.