Differences in regional and global lumbar angle during slumped sitting and upright sitting among global three subgroups.
J Back Musculoskelet Rehabil
; 34(5): 877-885, 2021.
Article
in En
| MEDLINE
| ID: mdl-34057131
ABSTRACT
OBJECTIVE:
The purpose of this study was to investigate differences in regional lumbar lordosis (RLL) and global lumbar lordosis (GLL) angle during slumped sitting and upright sitting among three global subgroups.METHODS:
A total of 48 young asymptomatic volunteers stood in a comfortable posture, sat upright, and sat in a slumped position for 5 seconds, with inertial measurement units attached to the T10, L3, and S2 vertebrae. According to standing measurement, the participants were categorized into flat-back (GLL < 20∘), normal lordosis (20∘⩽ GLL < 30∘), and hyper-lordosis (30∘⩽ GLL < 40∘) groups.RESULTS:
Both the GLL and RLL in the flat-back group were reduced lumbar lordosis in the upright sitting posture and increased lumbar kyphosis in the slumped sitting postures compared to the other groups (p< 0.05), but the range of motion during the transition from upright sitting to slumped sitting was lower than that of the normal and hyper-lordosis groups (p< 0.05). GLL in standing was a moderate correlation with GLL and RLL during upright sitting (p< 0.05). However, there was a strong correlation between GLL and RLL kinematics during upright and slumped sitting (p< 0.05).CONCLUSIONS:
Flat-back posture is a potential source of low back pain during both upright and slumped sitting compared to the normal and hyper-lordosis groups. Posture measurements in a standing and sitting position conducted to assess lordosis should consider the relationship between GLL and RLL.Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Sitting Position
/
Lordosis
Limits:
Humans
Language:
En
Journal:
J Back Musculoskelet Rehabil
Journal subject:
FISIOLOGIA
/
REABILITACAO
Year:
2021
Document type:
Article