Tag: trunk extensors

Variation in bioelectric activity of trunk extensors during loading with symmetric gravity torques in children with idiopathic scoliosis

Wiesław Chwała, Marianna Białek, Maciej Płaszewski

Wiesław Chwała, Marianna Białek, Maciej Płaszewski – Variation in bioelectric activity of trunk extensors during loading with symmetric gravity torques in children with idiopathic scoliosis. Fizjoterapia Polska 2008; 8(4); 393-400

Abstract
Background. Conflicting evidence is available on trunk erectors’ bioelectrical activity patterns during loading with symmetrical gravity torques in subjects with idiopathic scoliosis. This represents a significant hindrance to utilizing such information in scoliosis therapy. To identify the pattern of bioelectrical activity of trunk extensors during static contractions against symmetrical loading with body mass in subjects with idiopathic single- and double-curve scolioses of different Cobb angles. Material and methods. Biopotential activity was measured in 192 subjects aged 10-16 years with Cobb angles of 12-62°, of whom 59 had double-curve and 133 had single-curve thoracic scoliosis. Results. Biopotentials from dominant and non-dominant sides differed significantly in both tasks in patients with single-curve scoliosis (p<0.001). Muscle contraction patterns in double-curve scoliosis at the level of the primary curvature differed significantly in both tasks (p<0.001). Differences in contraction patterns at the level of the secondary curve were not significant (p<0.05). Conclusions. Significant differences were found in activity patterns of the muscles investigated between patients with singleand double-curve scolioses. The pattern of asymmetry is not directly connected with either severity or location of the curve (p<0.05, non-significant).
Key words:
electromyography, scoliosis, trunk extensors
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Cardiovascular response to static and dynamic trunk extensors endurance tests in healthy subjects

Chidozie E. Mbada, Saturday N. Oghumu, Olubusola E. Johnson, Olumide O. Dada, Abiola O. Ogundele. Oluwatosin O. Adeyemi

Chidozie E. Mbada, Saturday N. Oghumu, Olubusola E. Johnson, Olumide O. Dada, Abiola O. Ogundele. Oluwatosin O. Adeyemi – Cardiovascular response to static and dynamic trunk extensors endurance tests in healthy subjects. Fizjoterapia Polska 2012; 12(1); 13-20

Abstract
The objective of this study was to assess the cardiovascular response to static and dynamic trunk extensors endurance tests in healthy subjects. A pretest-posttest quasi-experimental study was conducted among 432 subjects. The subjects performed both Biering-Sørensen test of muscular endurance for static (BSME) and repetitive arch-up test (RAUT) for dynamic trunk extensors endurance until fatigue-exhaustion in a random order. The assessed cardiovascular parameters included: systolic blood pressure (SBP), diastolic blood pressure (DBP), heart rate (HR) and rate pressure product (RPP). Data were also obtained on demographics as well as selected anthropometric parameters. Descriptive and inferential statistics were used for analysis at 0.05 alpha level. DBP, HR and RPP significantly (p<0.05) reduced following BSME. RAUT led to significant (p<0.05) reduction in SBP and DBP and the increase in HR and RPP (p<0.05). The effect of BSME and RAUT on SBP (-0.4251± 10.1 vs. -1.60± 10.7) and DBP (-1.00± 7.88 vs. -1.81± 11.5) were comparable (p>0.05) while RAUT evoked significantly higher HR (2.54± 8.53) and RPP (1712.3± 1419.9) response (p<0.05). SBP, DBP and HR response to both BSME and RAUT were signi­­ficantly higher among male subjects (p<0.05). Covariance analysis revealed that age had a significant interaction effect with SBP response on BSME (p<0.05). Static and dynamic trunk extensor endurance tests performed to exhaustion led to a significant reduction in blood pressure in healthy subjects. Dynamic trunk extensors endurance test evoked a significant rise in heart rate and myocardial oxygen demand index. The study found that age had a significant interaction effect on blood pressure response to static trunk extensors endurance test.
Key words:
cardiovascular response, dynamic endurance, static endurance, trunk extensors
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