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A Journal on Physical Medicine and Rehabilitation after Pathological Events

Official Journal of the Italian Society of Physical and Rehabilitation Medicine (SIMFER), European Society of Physical and Rehabilitation Medicine (ESPRM), European Union of Medical Specialists - Physical and Rehabilitation Medicine Section (UEMS-PRM), Mediterranean Forum of Physical and Rehabilitation Medicine (MFPRM), Hellenic Society of Physical and Rehabilitation Medicine (EEFIAP)
In association with International Society of Physical and Rehabilitation Medicine (ISPRM)
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Europa Medicophysica 2002 September;38(3):131-7

language: English

The analysis of sit-to-stand movement in obese and normal subjects. Biomechanic evaluations and postural changes between groups

Bertocco P. 1, Baccalaro G. 1, Montesano A. 1, Vismara L. 1, Parisio C. 1, Galli M. 2

1 Italian Auxetic Institute, IRCCS Hospital, Pian­ca­vallo (VB)
2 Bio­en­gi­neering Depart­ment, Uni­ver­sity of ­Milan, ­Milan, ­Italy


Back­ground. Over­weight and ­obesity are ­likely to be con­sid­ered ­risk fac­tors for oste­oar­thritis in ­adult age, ­with con­se­quences of ­pain in a lot of dis­tricts, ­such as low ­back, ­knee, hip and ­foot, mus­cular weak­ness and lim­ited activ­ities of ­daily ­living. Sit-to-­Stand (STS) is a typ­ical ­daily ­living ­activity and it can be speri­men­tally ­used to mon­itor ­pain or ill­ness con­di­tions. ­Respecting oste­oar­thritis, mus­culo-skel­etal ­pain and mus­cular weak­ness, STS move­ment may ­become dif­fi­cult in ­obese ­patients. Aim of the ­study is the anal­ysis of the STS move­ment in ­healthy and ­obese sub­jects, by ­using a bio­me­chan­ical ­model, in ­order to evi­dence dif­ferent bio­me­chan­ical strat­e­gies and pos­tural ­changes, and to ­define pec­uliar reha­bil­i­ta­tion pro­grams.
­Methods. Ten ­adult ­young ­normal ­weight sub­jects (7 ­female, 3 ­male; age 26.50±1.64 yrs; BMI 22.20±2.85) and 30 ­obese ­patients (25 ­female, 5 ­male; age 48.12±11.74; BMI 37.52±4.48) ­were ­recruited. A spe­cific ­motion meas­ure­ment ­system, a ­force plat­form and a bio­me­chan­ical ­model ­were ­adapted and ­studied to ana­lyse ­kinetic and kin­e­matic ­data at the low ­back, at the hip, at the ­knee and at the ­foot.
­Results. In ­obese sub­jects the move­ment ­strategy was char­ac­ter­ised by a lim­ited ­trunk ­flexion and a ­feet move­ment back­wards ­from the ­initial posi­tion. ­Kinetic ­data are ­able to con­firm ­high ­values of the ­momentum of the ­knee ­joint and a reduc­tion of the ­momentum of the hip ­joint. ­Reverse pat­tern of ­strategy move­ment and ­kinetic ­data ­were ­found in ­healthy sub­jects.
Con­clu­sions. ­During STS, ­obese sub­jects use a ­strategy char­ac­ter­ised by a low ­trunk ­flexion and a ­high ­momentum at the ­knee ­joint. ­This over­load con­di­tion ­could be dan­gerous for degen­er­a­tive prob­lems, ­joints and mus­cular weak­ness, and ­poor func­tional activ­ities of ­daily ­living, and it ­could be impor­tant in plan­ning ­adapted pos­tural re-ed­u­ca­tional and spe­cific reha­bil­i­ta­tive pro­grams.

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