Skip to main content

Table 4 Results for normalised (%SMVC) amplitude EMG of the right musculature during functional tasks

From: Investigating differences in trunk muscle activity in non-specific chronic low back pain subgroups and no-low back pain controls during functional tasks: a case-control study

Task Muscle AEP FP Healthy Kruskal-Wallis Mann Whitney-U Pairwise comparisons (post hoc)
(*p < 0.05) (*p < 0.0167)
Number of trials Mean (SD) Number of trials Mean (SD) Number of trials Mean (SD)   
Step Down TrA/IO 21 57.4 (32.3) 21 62.3 (34.5) 25 52.6 (32.6) 0.576 –
EO 21 54.4 (26.8) 24 46.2 (23.9) 22 38.8 (21.2) 0.109 –
sLM 20 33.8 (32.2) 22 24.6 (23.6) 25 16.2 (10.7) 0.136 –
LT 18 25.8 (20.6) 22 26.2 (17.7) 26 26.9 (24.5) 0.937 –
Step Up TrA/IO 21 55.1 (31.4) 21 65.0 (39.0) 25 51.1 (33.4) 0.419 –
EO 21 53.8 (25.0) 24 46.8 (25.0) 22 36.8 (19.7) 0.059 –
sLM 20 33.8 (33.8) 22 25.0 (24.8) 25 14.6 (9.7) 0.046* AEP vs H
LT 18 26.7 (21.0) 22 26.2 (19.2) 26 25.8 (27.9) 0.547 –
Reach Up TrA/IO 23 50.2 (25.0) 20 63.6 (36.8) 25 50.2 (35.2) 0.284 –
EO 23 50.7 (23.1) 24 44.2 (23.7) 22 36.7 (19.7) 0.108 –
sLM 20 26.9 (25.2) 22 19.4 (23.1) 26 12.9 (8.7) 0.039* AEP vs H
LT 19 26.7 (26.2) 22 22.7 (16.0) 26 21.1 (16.6) 0.698 –
Pick Up Pen (Bend Down) TrA/IO 21 54.1 (34.3) 20 64.1 (38.0) 26 50.0 (31.1) 0.391 –
EO 21 50.2 (23.8) 24 43.9 (25.7) 21 35.0 (17.8) 0.101 –
sLM 18 28.4 (26.4) 23 20.0 (23.6) 24 16.3 (12.8) 0.132 –
LT 18 25.6 (21.5) 23 24.0 (18.5) 26 23.6 (19.0) 0.827 –
Pick Up Pen (Return) TrA/IO 21 54.9 (34.5) 20 62.3 (37.4) 25 48.5 (27.8) 0.45 –
EO 20 50.3 (26.4) 24 43.2 (25.2) 21 34.5 (17.8) 0.122 –
sLM 18 29.0 (24.8) 23 20.4 (22.3) 24 16.1 (10.2) 0.089 –
LT 17 26.9 (21.8) 23 24.1 (17.9) 26 24.2 (23.8) 0.625 –
Stand-to-Sit TrA/IO 22 59.7 (49.4) 18 68.3 (53.1) 24 44.3 (27.3) 0.266 –
EO 22 53.6 (25.5) 21 46.2 (24.0) 20 37.8 (20.4) 0.14 –
sLM 20 50.8 (67.8) 21 31.2 (23.6) 24 19.8 (18.3) 0.054 –
LT 17 56.3 (79.5) 22 32.1 (17.3) 24 40.8 (48.7) 0.693 –
Sit-to-Stand TrA/IO 22 58.8 (52.4) 18 55.1 (34.8) 23 42.1 (27.6) 0.381 –
EO 22 51.5 (24.9) 21 44.6 (23.2) 21 44.0 (37.6) 0.259 –
sLM 19 44.9 (76.9) 21 23.0 (24.9) 23 12.5 (7.1) 0.254 –
LT 18 27.7 (22.3) 22 23.5 (15.7) 24 33.5 (47.8) 0.523 –
Box Replace TrA/IO 23 61.2 (41.8) 20 69.3 (44.2) 25 52.3 (37.5) 0.453 –
EO 23 55.5 (25.6) 23 44.4 (24.7) 21 37.8 (19.3) 0.062 –
sLM 19 33.1 (23.3) 23 22.9 (22.5) 25 17.1 (11.1) 0.026* AEP vs H
LT 19 33.5 (26.9) 22 24.6 (16.8) 25 27.1 (28.7) 0.486 –
Box Lift TrA/IO 23 61.3 (42.1) 20 69.7 (44.9) 25 52.0 (38.2) 0.349 –
EO 23 57.6 (25.6) 23 43.8 (23.4) 21 37.5 (19.1) 0.019 AEP vs H
sLM 19 32.9 (22.5) 23 24.6 (24.3) 25 18.4 (12.0) 0.051 –
LT 18 31.9 (25.5) 22 25.3 (16.6) 25 29.0 (32.7) 0.469 –
  1. Key: FP = Flexion pattern motor control impairment, AEP = Active extension pattern motor control impairment, H = Healthy, SD = Standard deviation, * = significant difference (p < 0.05), TrA/IO = Transversus Abdominis / Internal Oblique, EO = External Oblique, sLM = superficial Lumbar Multifidus, LT = Longissimus Thoracis (Erector Spinae)
Back to article page

BMC Musculoskeletal Disorders

ISSN: 1471-2474

Contact us