• We are advancing toward the development of a digital twin that captures human locomotion. The key is to incorporate principles of human motor control that humans are thought to employ to effectively coordinate multiple muscles.

  https://arxiv.org/abs/2608.17030

  https://arxiv.org/abs/2603.10474

• “Everything should be made as simple as possible, BUT NOT SIMPLER.” This quote by Albert Einstein clearly suggests the way of modeling. We quantitatively demonstrated that the commonly used models of hand force and moment are overly simplified.

https://www.sciencedirect.com/science/article/pii/S2589004225024071

• Contrary to previous speculation, technologically advanced running shoes (a.k.a. super shoes)—which are reported to enhance running performance—do not necessarily increase the risk of injury. In fact, they may promote not only more efficient but also safer running.

https://www.nature.com/articles/s41598-025-03029-0

• So far, wheelchair propulsion patterns have been typically classified based on injury levels. We show that propulsion of the wheelchair users is more strongly influenced by the activity level and experience; structured propulsion training and activity-based interventions are essential for better rehabilitation and better wheelchair propulsion.

  https://ieeexplore.ieee.org/document/11177588

• Is running of professional runners more “stable” than that of novices? Not exactly. Professional runners achieve high efficiency at the cost of weak stability.
  https://doi.org/10.1016/j.heliyon.2024.e34707

• People use mathematical techniques to assess stability of various dynamical processes, including human motion and economy. However, current measurements are vulnerable to noise, which inevitably exists in the real world. We developed a novel mathematical technique that enables more accurate and noise-robust assessment of dynamic stability.
  https://doi.org/10.1016/j.chaos.2023.113916
• Barely detectable vibration applied to soles can enhance your jump height.
  https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0266597
• Humans typically move in a way that is comfortable in the short term but harmful in the long term. Because the deleterious effects of such comfortable but unsafe motion develop slowly, people do not perceive the risk in time as in the case of disc degeneration. We can resolve this.
  https://robotics.sciencemag.org/content/6/57/eabe1243
  https://www.youtube.com/watch?v=j5ux5VdPIjE
• Detecting the intention of human movement requires multiple sensors. We reduced the number of required sensors dramatically… to …ONE.
  https://ieeexplore.ieee.org/document/9305235
  https://www.youtube.com/watch?v=rultnG-gPSQ
• As we become older, both our strength and endurance decrease no matter how much we exercise. How and when will our motor ability begin to alter? We found the critical age when our athletic performance is likely to change.
  https://www.aging-us.com/article/102126/text
  https://www.aging-us.com/article/202461/text
• When we walk or run on a treadmill, it feels so different from our over-ground exercise. Why so?
  https://www.nature.com/articles/s41598-019-49272-0
• When we experience fatigue, we cannot balance well and may even fall. However we can mitigate this with undetectable vibration.
  https://www.nature.com/articles/s41598-020-58815-9
• Body compositions like muscle mass and fat mass are important indicators of health, but measuring them requires expensive devices like DXA or MRI. We propose a much easier way to estimate them.
  https://doi.org/10.1016/j.clnu.2021.11.027
• Large variability of toe clearance during walking increases the risk of tripping. Applying small but barely detectable vibration to soles can reduce this risk.
  https://doi.org/10.1371/journal.pone.0261732
• The fact that some devices are widely used does not guarantee that they are reliable or accurate. We need to quantify their reliability & accuracy, and suggest better ways.
  https://doi.org/10.3390/s21165511