英语翻译SupportthePelvisForyears,expertsindesign,ergonomicsandmedicinehaverecognizedtheimportanceofseatingdesignthatcontrolstherearwardtiltofthepelvis.Recentresearchfoundthattheadditionofawedge-shaped"pelvicsupport

Question

英语翻译
Support the Pelvis
For years,experts in design,ergonomics and medicine have recognized the importance of seating design that controls the rearward tilt of the pelvis.Recent research found that the addition of a wedge-shaped "pelvic support" just behind the ischia stops the rearward rotation of the pelvis in upright postures and prevents the unnatural flattening or kyphotic curving of the lumbar spine.
However,experimentation with different degrees of inclination in the wedge supports found that those that could control pelvic rotation (20 to 30 degrees of incline) led to discomfort and soreness when placed on the seat just behind the ischia.In addition,one person's natural lordotic curve differs from another's,so the amount of pelvic support required to maintain individual spinal alignment varies.27
If there is not sufficient support,the pelvis will rotate backward and flatten the lumbar spine.If there is too much support,the pelvis may be forced to tilt too far forward,creating extreme lumbar lordosis that causes the thoracic and cervical spine to compensate with extreme curves to maintain balance.The result of such a forced posture is increased muscle activity and disc pressure leading to fatigue and discomfort.
Many work chair designs have attempted to control rearward pelvic tilt by lowering the lumbar support to the pelvic level or by providing support for the ilia bones of the pelvis.But these solutions leave an open void between the backrest and the sitter's lower back.This failure to provide evenly distributed support across the entire,contoured surface of the sacral-pelvic region leaves the base of the spine unsupported.
Although the location of the lumbar spine varies greatly from person to person—as much as four inches or +/- two inches—there is little variation (+/- 5/8 inch) among the adult population in the height and width of the sacral-pelvic anatomy.28,29 This fact has allowed the design of a single-sized back support,shaped to fit the contours of the sacral-pelvic area that adjusts to fill the void between the contours of the sacral-pelvic area and the backrest.
This improved contact and support helps to sustain the forward tilt of the pelvis,which restores natural spinal curvatures to improve posture and muscle balance,thereby reducing fatigue and increasing endurance.Simultaneously supporting the sacrum and the ilia improves surface load distribution across the lower back to provide comfortable,contoured support.

Answer 1

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