Effect of Different Upright Sitting Postures on Spinal-Pelvic Curvature and Trunk Muscle Activation in a Pain-Free Population

O’Sullivan, Peter; Dankaerts, Wim; Burnett, Angus; Farrell, Garreth T; Jefford, Evonne; Naylor, Clare S; O’Sullivan, Kieran

doi:10.1097/01.brs.0000234735.98075.50

Cited by 253 publications

(193 citation statements)

References 34 publications

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“…This suggests that tilting the wheelchair seat surface forward enables more efficient one-leg propulsion of a wheelchair with lower activity of the trunk and lower limb muscles. Forward tilt of the pelvis when sitting requires appropriate activity of the lumbar erector spinae, lumbar multifidus, internal oblique, hip flexor, and other muscles 6,7) . By tilting the seat surface forward, the forward tilt moment acts on the pelvis and pelvis backward tilt moment is decreased by the muscle group of the posterior thigh, including the hamstrings.…”

Section: Discussionmentioning

confidence: 99%

“…Load on the lower limbs when sitting is ≥25% with forward tilt of the pelvis, about 25% in a neutral position, and ≤25% in a backward tilt 4,5) . Forward tilt of the pelvis when sitting requires appropriate activity of the erector spinae, internal oblique, hip flexor, and other muscles 6,7) . Hemiplegic patients, however, have difficulty tilting the pelvis forward because of decreased trunk function 8) .…”

Section: Introductionmentioning

confidence: 99%

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Effects of Forward Tilt of the Seat Surface on Trunk and Lower Limb Muscle Activity during One-leg Wheelchair Propulsion

2012

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Abstract. [Purpose] To investigate the effects of forward tilt of the seat surface on the efficiency of wheelchair one-leg propulsion.[Subjects] Subjects were 10 healthy adults (4 men, 6 women; mean age, 27.7 ± 6.1 years; height, 166.8 ± 6.5 cm; weight, 57.9 ± 12.2 kg). [Method] This study investigated the effects of forward tilt of the seat surface (0° or 10°) on the efficiency of one-leg propulsion, based on muscle activity of the rectus abdominis, internal oblique, lumbar erector spinae, lumbar multifidus, hamstring and external oblique muscles when propelling a wheelchair at 1 m/s, and the time taken to travel 10 m using one-leg propulsion at maximum effort.[Result] Time taken to travel 10 m at maximum effort was significantly shorter with forward tilt than without. Muscle activity of all the muscles except the external oblique was significantly lower with forward tilt than without.[Conclusion] Tilting the wheelchair seat forward may be useful during one-leg wheelchair propulsion for individuals with decreased ability to tilt the pelvis forward.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of Forward Tilt of the Seat Surface on Trunk and Lower Limb Muscle Activity during One-leg Wheelchair Propulsion

2012

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“…Therefore, clinicians have tried to employ strategies that make it easier for people with LBP to recruit these muscles. Increased LM activity has been reported when a lumbar lordosis is present which extends throughout the lumbar region to the thoracolumbar junction (Roussouly et al, 2005;O'Sullivan et al, 2006). Claus et al (2009) found that increasing anterior pelvic tilt up to the point of achieving a lordosis up to the thoracolumbar junction resulted in the highest measured activity of both TrA and LM compared to slumped and hyperlordotic (extended into the thoracic spine) postures.…”

Section: Introductionmentioning

confidence: 97%

“…Claus et al (2009) found that increasing anterior pelvic tilt up to the point of achieving a lordosis up to the thoracolumbar junction resulted in the highest measured activity of both TrA and LM compared to slumped and hyperlordotic (extended into the thoracic spine) postures. Therefore, the maintenance of a lumbar lordosis is a cornerstone of specific motor control training (O'Sullivan et al, 2006;Claus et al, 2009;Roussouly et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

The immediate effects of exercise using the Functional Re-adaptive Exercise Device on lumbopelvic kinematics in people with and without low back pain

Winnard

Debuse

Wilkinson

et al. 2017

Musculoskeletal Science and Practice

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BackgroundDysfunction of the lumbar multifidus (LM) and transversus abdominis (TrA) muscles is associated with low back pain (LBP). The Functional Re-adaptive Exercise Device (FRED) has shown potential as a non-specific LBP intervention by automatically recruiting LM and TrA. Loss or lordosis and altered lumbopelvic positioning has also been linked to LBP and is often trained within LM and TrA interventions. The effect that FRED exercise has on lumbopelvic positioning and lumbar lordosis is unknown. ObjectivesTo assess the effect of FRED exercise on lumbopelvic kinematics and alignment to establish whether FRED exercise promotes a favourable lumbopelvic posture for training LM and TrA. DesignWithin and between-group comparison study MethodOne hundred and thirty participants, 74 experiencing LBP, had lumbopelvic kinematic data measured during over-ground walking and FRED exercise.Magnitude-based inferences were used to compare walking with FRED exercise within participants and between the asymptomatic and LBP groups, to establish the effects of FRED exercise on lumbopelvic kinematics, compared to walking, in each group. ResultsFRED exercise promotes an immediate change in anterior pelvic tilt by 8.7 degrees compared to walking in the no-LBP and LBP groups. Sagittal-plane spinal extension increased during FRED exercise at all spinal levels by 0.9 degrees in the no-LBP group, and by 1.2 degrees in the LBP group. ConclusionsFRED exercise promotes a lumbopelvic position more conducive to LM and TrA training than walking in both asymptomatic people and those with LBP. Highlights A posture conducive to LM and TrA training was promoted. The posture appears to occur automatically in people with and without LBP. Exercise on the FRED may be effective for LM and TrA training.

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“…Recently, some studies have been carried out on spinal alignment in upright sitting 17,18) . The data from these studies have become a reference point when considering the desirable spinal alignment of sitting, and the positions they have reported are meaningful for preventing low back pain related to sitting.…”

Section: Introductionmentioning

confidence: 99%

Influence of Different Spinal Alignments in Sitting on Trunk Muscle Activity

Miura

Sakuraba

2013

J Phys Ther Sci

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Abstract.[Purpose] To clarify the relationship between spinal alignment and trunk muscle activities in upright sitting without manual intervention.[Subjects] Twenty-three healthy male volunteers with no history of lumbar disorders participated in this study.[Methods] Trunk alignment and surface electromyographic activities of 6 trunk muscles were measured synchronously during the motion from slump to upright sitting position. The amplitude of the muscle activities were normalized to maximal voluntary contraction. Subjects were classified into 3 spinal alignment groups: long lordosis (LL), short lordosis (SL), and kyphosis (K).[Results] The LL group consisted of 9 subjects (39%), the SL group of 9 subjects (39%), and the K group of 5 subjects (22%). The K group had significantly lower muscle activity of the back and abdominal muscles. The SL group had significantly greater muscle activity of the lumbar paraspinals than the LL group, and greater activity of the lumbar multifidus was observed in the SL group than in the other groups. The LL group showed significantly greater muscle activity of the internal oblique muscle than the other groups.[Conclusion] Upright sitting without manual correction leads to various kinds of spinal alignment. Judging from trunk muscle activities, we suggest that the desirable spinal alignment in upright sitting is a neutral lumbar position with no thoracolumbar kyphosis.

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Effect of Different Upright Sitting Postures on Spinal-Pelvic Curvature and Trunk Muscle Activation in a Pain-Free Population

Cited by 253 publications

References 34 publications

Effects of Forward Tilt of the Seat Surface on Trunk and Lower Limb Muscle Activity during One-leg Wheelchair Propulsion

Effects of Forward Tilt of the Seat Surface on Trunk and Lower Limb Muscle Activity during One-leg Wheelchair Propulsion

The immediate effects of exercise using the Functional Re-adaptive Exercise Device on lumbopelvic kinematics in people with and without low back pain

Influence of Different Spinal Alignments in Sitting on Trunk Muscle Activity

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