Yoriko Atomi

The free moment is associated with torsion between the pelvis and the foot during gait

BACKGROUND During walking, the friction between the foot and the ground surface causes a free moment (FM), which influences the torsional stress on the lower extremity. However, few studies have investigated the FM during natural walking. The main aim of this study was to examine the relationship between the FM and the absolute and relative rotation angles of the foot and pelvis. METHODS The rotation angles of foot and pelvic were measured in 18 healthy men using a motion capture system. Rotation angles were measured in absolute and relative coordinates as well as in reference to the line connecting the center of pressure (CoP) line under the right and left feet to evaluate the effects of the opposite lower limb on the FM. The absolute and relative rotation angles of the foot and pelvis were entered into forced-entry linear regression models to evaluate the influence on the FM. FINDINGS Only the relative angle of rotation between the foot and pelvis could explain the prediction equations significantly. In the Pearsons product-moment correlation coefficient, the rotation angles of the foot and pelvis defined using the bilateral CoP points had not significantly correlated with FM. No joint rotation movement was correlated with FM. INTERPRETATION The torsion of the entire lower extremity should be performed principally through hip internal rotation. When evaluating the FM as a torsional stress, focusing on the rotation of the entire lower extremity, rather than on one segment, is beneficial.

Geroscience From Cell-body Dynamics and Proteostasis Cooperation Supported by αB-crystallin and Human will ~ A Proposal of “Body-Mind Integrative Science”

The importance of small heat shock protein HSP in geroscience is increasing. We believe that research progress from life science should contribute to well-being. Molecular chaperone studies are considered superior when performed on model substrates and model animals. However, by itself, concrete measures for extending the healthy life of human beings are not provided. It is important to analyze the cell-animal-human results, interpret the relationship, and promote comprehensively studied HSP research. αB-crystallin (CRYAB) was identified for key molecule to explain the mechanism of exercise adaptation of slow-twitch muscle for a long ago. It is only human beings that stand up against gravity and move all day in their standing position. With CRYAB and tubulin/microtubule as a key word, we will introduce the principle of clarifying not only cells but also how to control the human body. Mechanistically fiber structure produced after protein assembly has not only multifunction but also is available as materials to make “body” and can sustain body weight by tension development at both micro- and macro-levels. This links cell’s autonomous regulating ability and human will to keep standing. This manuscript may contribute to develop a new direction of HSP Geroscience research proposing real program to healthy aging and mature human world.