Evaluation of the internal oblique, external oblique, and transversus abdominalis muscles in patients with ankylosing spondylitis: an ultrasonographic study

Evaluation of abdominal and lumbar multifidus muscles thickness and relation to endurance, pain, fatigue and functional mobility in patients with Fibromyalgia syndrome: a case-control study

OBJECTIVE

The aim of present study was to compare abdominal (transversus abdominis (TrA), internal oblique (IO) and external oblique (EO)) and lumbar multifidus muscles (LM) evaluated with ultrasonographic (US) imaging in patients with FM (Fibromyalgia) and asymptomatic individuals and to examine the relationship between these muscle thickness and endurance, pain, fatigue and functional mobility.

METHODS

Women with FM group (n: 53, age: 45.96 ± 9.96 years), and asymptomatic control group (n: 49, age: 45.12 ± 7.28), were included in this study. Pain severity, disease activity, physical activity level, fatique, thickness of TrA, IO, EO and LM muscles and endurance, and functional mobility were evaluated with the Visual Analogue Scale (VAS), Fibromyalgia Impact Questionnaire (FIQ), International Physical Activity Questionnaire- Short Form (IPAQ-SF), Fatigue Severity Scale (FSS), US imaging, McGill core endurance tests, and physical fitness tests, respectively. FM patients were classified according to the FSS score.

RESULTS

The thickness of the IO (right side) (p = 0.013) and LM (both sides) (p < 0.001) muscles, lumbopelvic muscle endurance (all p < 0.001) and physical fitness tests (all p < 0.001) were lower in FM group compared to the asymptomatic group. No statistically significant differences were found in TrA, IO (left side), EO muscles thickness between the two groups (all p > 0.05). LM muscle thickness was significantly correlated with lumbopelvic muscle endurance (all p < 0.05), physical fitness tests (all p < 0.001) and fatique (p = 0.001). Moreover, significant differences in LM muscle thickness (p = 0.007), trunk flexor muscle endurance (p = 0.016), left trunk lateral flexor muscle endurance (p = 0.045) and 30-s chair stand test (p = 0.025) in favor of the low-fatigue group were detected.

CONCLUSION

The thickness of LM muscle, lumbopelvik endurance and functional mobility in FM patients have been affected negatively. These findings should be considered in management of FM.

The Role of Core Stability and Core Muscles in Ankylosing Spondylitis: A Review of Functional and Clinical Importance

Purpose: Physiotherapy and exercise training are one of the cornerstones in the treatment of patients with ankylosing spondylitis (AS). However, although the effects of exercise programs and their superiority over each other have still not been determined, research on this subject is continuing in the literature day by day. Due to the pathophysiology of AS, the spine is one of the most affected areas of the musculoskeletal system. Therefore, stabilization of the lumbopelvic region and the spine, which is the reference point for the core muscles, is important for the treatment and management of this disease. In this review, the involvement of core muscles and core stability in patients with AS and the literature on core training programs will be discussed.

Association of Core Muscle Endurance Times With Balance, Fatigue, Physical Activity Level, and Kyphosis Angle in Patients With Ankylosing Spondylitis

BACKGROUND/OBJECTIVE

Core muscle endurance (CME), which is the ability of sustaining the activity of trunk muscles, has been shown to be lower in patients with ankylosing spondylitis (AS). The aim was to investigate the possible relationship between CME times and balance, fatigue, physical activity (PA) level, and thoracic kyphosis angle.

METHODS

Fifty-one patients with AS with a mean age of 41.0 years (interquartile range, 25/75 years; 29.0/51.0 years) were included in the study. Core muscle endurance times were assessed by using trunk extension, trunk flexion, and side bridge tests. Overall stability index, anteroposterior stability index, mediolateral stability index, and limits of stability were evaluated with the Biodex Balance System. Fatigue and PA levels were surveyed using Fatigue Severity Scale and International Physical Activity Questionnaire, respectively. Thoracic kyphosis angle was measured by using a digital inclinometer. Additionally, CME times were compared for "high-fatigue" versus "low-fatigue" and as "low PA" versus "moderate/high PA" groups. Spearman correlation coefficients and Mann-Whitney U test were used for statistical analysis.

RESULTS

Significant correlations were detected between overall stability index, anteroposterior stability index, Fatigue Severity Scale, International Physical Activity Questionnaire, and all CME tests (p < 0.05) and between mediolateral stability index and side bridge test (p < 0.05). Limits of stability correlated only with side bridge test (p < 0.05). Core muscle endurance significantly differed between high-fatigue and low-fatigue groups (p < 0.05), except trunk flexor test (p > 0.05). No significant differences were observed between low PA and moderate/high PA groups (p > 0.05), except side bridge test (p < 0.05).

CONCLUSIONS

Core muscle endurance times seem to be related to PA level, fatigue, and balance but not with thoracic kyphosis angle. Assessing CME in patients with AS might help in planning individualized exercise programs.

Proximal and distal muscle thickness is different in women with patellofemoral pain but is not associated with knee frontal plane projection angle

OBJECTIVE

The aim of this study was to compare proximal and distal muscle thickness between patellofemoral pain (PFP) and asymptomatic women (CG) and to verify the possible association between morphology and lower limb alignment during single leg-squat.

METHODS

Thirty women (PFP, n = 15 and CG, n = 15) performed the following evaluations: (i) muscle thickness of external oblique (EO), gluteus medius (GMed), tensor fascia latae (TFL), peroneus (PER) and tibialis anterior (TA); (ii) knee frontal plane projection angle (FPPA) during single-leg squat.

RESULTS

Compared with the CG, PFP showed: (1) smaller GMed (-10.02%; p = 0.04; effect size = 0.82), greater TFL (+18.44%; p = 0.02; effect size = 0.92) and PER (+14.23%; p = 0.02; effect size = 0.87) muscle thickness and greater knee FPPA during single-leg squat (+31.8%; p = 0.04; effect size = 1.12). No differences were observed in EO (+7.17%; p = 0.37; effect size = 0.34) and TA (-1.35%; p = 0.81; effect size = 0.12) muscle thickness. Additionally, we failed to observe significant associations between muscle morphology and knee FPPA in both groups.

CONCLUSION

PFP patients showed alterations in proximal and distal muscle thickness, despite the lack of association with poor lower limb alignment. Prospective studies are necessary to determine if differences in muscle morphology are the cause or the consequence of PFP and to confirm the absence of relationship with lower limb alignment.

Core stability and balance in patients with ankylosing spondylitis

The main purpose of this study was to compare core stability and balance between ankylosing spondylitis (AS) patients and healthy controls. AS patients diagnosed according to the Modified New York criteria and healthy age- and sex-matched controls were included in the study. Clinical status of AS patients was assessed using Bath AS Disease Activity Index (BASDAI), Bath AS Functional Index (BASFI), Bath AS Spinal Mobility Index (BASMI). For evaluation of core stability, static and dynamic core endurance and hip strength were assessed. Trunk flexor and extensor endurance, lateral side bridge tests for static core endurance; modified sit-up test for dynamic core endurance were used. Hip strength was measured with a hand-held dynamometer. Biodex Balance System was used to assess static and dynamic balance. Bilateral standing static and dynamic postural stability, single leg standing postural stability and limits of stability test results were recorded. 64 AS patients (40 male, 24 female) and 64 healthy controls (39 male, 25 female) were assessed. Static and dynamic core endurance test results, hip abductor strength were significantly higher in control group than AS group (p < 0.05). Static postural stability and left leg postural stability test results were significantly better in control group than AS group (p < 0.05). Overall, forward, backward, and right, limits of stability test results were significantly higher in control group (p < 0.05). The results of our study demonstrate that AS has negative effects on core stability and balance. It would be beneficial to add core stability and balance training to AS patients' rehabilitation program.