Seyed-Saleh Hosseini-Yazdi

This study shows that vertical ground reaction force morphology during walking reflects the imbalance between push-off and collision impulses, with a preferred balance at 1.2 m/s.

The paper develops a modified inverted pendulum model to show that human walking speed and step length are constrained by mechanical feasibility and work capacity, not just energy efficiency.

The paper shows that pre-emptive push-off optimizes walking economy, while delayed push-off during uneven walking incurs mechanical costs.

The paper investigates whether extending step length or stepping over perturbations is more energy-efficient during uneven walking, finding a velocity-dependent threshold for each strategy.

This study estimates preferred walking speeds by analyzing center of mass work, finding optimal push-off impulses that minimize energy dissipation across different terrains and demographics.

This paper quantifies the energy cost of walking on uneven terrain, showing it increases quadratically with amplitude and cubically with speed.

This paper describes modifications to a split-belt instrumented treadmill to enable use on uneven terrain, demonstrating accurate ground reaction force measurements.

This study investigates how mechanical factors during walking shape vertical ground reaction force (vGRF) profiles, finding that asymmetry in step-transition work influences vGRF morphology and introducing a new metric to assess gait efficiency.

This study estimates the metabolic cost of lateral balance maintenance during walking and finds it is terrain-specific and increases with restricted lookahead.

This study examines how young and older adults adjust walking momentum and work during uneven terrain, finding differences in modulation strategies based on lookahead conditions and step type.

This study examines how ground reaction force impulses change with walking speed and terrain amplitude in young and older adults during uneven walking.

This paper introduces a modified definition of center-of-mass energy recovery in human walking, showing it decreases with speed and is influenced by dissipation and muscle work.

The paper presents a simplified method for calibrating instrumented treadmills using an instrumented pole with reduced force requirements, achieving high accuracy in ground reaction force measurements.