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Cai C, Gazali NA, Tan XN, Soon B, Lee ATH, Aw QWS, Dana DD, Kwok JCT, Kwa MJ. Comparison of psoas major activation during standing hip flexion between chronic low back pain and healthy populations. J Back Musculoskelet Rehabil 2024; 37:1299-1308. [PMID: 38578881 DOI: 10.3233/bmr-230384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/07/2024]
Abstract
BACKGROUND The psoas major (PM) has been identified as a potential contributor to chronic low back pain (LBP). However, few studies have investigated the effects of upright functional movement on PM activation in cLBP individuals. OBJECTIVE This cross-sectional study aims to compare PM muscle activation characteristics in chronic LBP (cLBP) and healthy subjects during the transition from quiet double-leg standing to standing hip flexion. METHODS Ultrasound Imaging was used to assess PM thickness at the lumbar vertebral level of L4-5 in 12 healthy and 12 cLBP participants. The changes in thickness between the test positions were utilized as a proxy for PM activation. RESULTS The cLBP group exhibited greater thickness changes on the non-dominant side PM during contralateral hip flexion but not ipsilateral hip flexion (p= 0.369) compared to their healthy counterparts (p= 0.011; cLBP: resting 27.85 mm, activated 34.63 mm; healthy: resting 29.51 mm, activated 29.00 mm). There were no significant differences in dominant side PM thickness changes between the two groups during either contralateral or ipsilateral hip flexion (p= 0.306 and p= 0.077). CONCLUSION Our findings suggest a potential overactivation of the PM in the cLBP population. This insight may aid in the development of tailored rehabilitation programs.
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Affiliation(s)
- Congcong Cai
- Health and Social Sciences Cluster - Physiotherapy, Singapore Institute of Technology, Singapore
- Physiotherapy, Rehabilitation Department, Ng Teng Fong General Hospital, JurongHealth Campus, National University Health System, Singapore
| | - Nurul Adliah Gazali
- Health and Social Sciences Cluster - Diagnostic Radiography, Singapore Institute of Technology, Singapore
- Department of Radiology, Sengkang General Hospital, Singapore
| | - Xin Ning Tan
- Health and Social Sciences Cluster - Physiotherapy, Singapore Institute of Technology, Singapore
| | - Benjamin Soon
- Health and Social Sciences Cluster - Physiotherapy, Singapore Institute of Technology, Singapore
| | - Adrian Thian Huat Lee
- Health and Social Sciences Cluster - Diagnostic Radiography, Singapore Institute of Technology, Singapore
| | - Qian Wen Simone Aw
- Health and Social Sciences Cluster - Diagnostic Radiography, Singapore Institute of Technology, Singapore
| | - Dharini D/O Dana
- Health and Social Sciences Cluster - Diagnostic Radiography, Singapore Institute of Technology, Singapore
| | - Joanne Ching Tung Kwok
- Health and Social Sciences Cluster - Diagnostic Radiography, Singapore Institute of Technology, Singapore
| | - Mei Jun Kwa
- Health and Social Sciences Cluster - Physiotherapy, Singapore Institute of Technology, Singapore
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Reed CA, DuBois CK, Hutchison KA, Huppert TJ, Monfort SM. Influence of serial subtraction tasks on transient characteristics of postural control. Hum Mov Sci 2022; 83:102950. [PMID: 35397288 PMCID: PMC11327925 DOI: 10.1016/j.humov.2022.102950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 03/15/2022] [Accepted: 03/28/2022] [Indexed: 11/17/2022]
Abstract
We sought to better understand the influence of cognitive perturbations on transient aspects of postural control. Twenty healthy, younger adults had their postural control assessed during eyes open quiet stance. Participants completed three different conditions that either had no cognitive perturbation present, an easy cognitive perturbation (i.e., serial subtraction by ones), or a more difficult cognitive perturbation (i.e., serial subtraction by sevens). All trials finished with 60 s of undisturbed eyes open quiet stance, which was the focus of the balance assessment. 95% confidence ellipse area (EA) was calculated for 5-s epochs throughout the trial. The difference in EA from the first epoch after participants started (onset) or stopped (offset) the cognitive task to the last epoch of the trial (i.e., 55-60 s after perturbation) was used to characterize transient postural control behavior. Functional near-infrared spectroscopy was also used to quantify changes in prefrontal cortex activation during the counting tasks to support interpretation of the transient balance findings. There was a significant effect of condition for transient balance characteristics following a cognitive perturbation (P < 0.001), with greater transient increases in postural sway for both difficult (Cohen's d = 0.40, P < 0.001) and easier (Cohen's d = 0.29, P = 0.013) cognitive perturbations relative to no cognitive perturbation. The onset of cognitive tasks was also associated with greater transient increases in postural sway than the offset of the cognitive tasks (Cohen's d = 0.24, P = 0.019). The functional near-infrared spectroscopy data indicated that a significant decrease in deoxygenated hemoglobin was observed for left Brodmann area 46 for both the subtraction by ones (T = -3.97; Benjamini-Hochberg significance value (q) = 0.008) and subtraction by sevens (T = -3.11; q = 0.036) conditions relative to the baseline condition. The subtraction by sevens condition was also associated with a relative increase in deoxygenated hemoglobin for the right Brodmann area 9 (T = 3.36; q = 0.026) compared to the subtraction by ones condition. In conclusion, serial subtraction can elicit transient increases in postural sway, with more difficult tasks and the onset of the cognitive-motor challenge exhibiting magnified effects. Additionally, even the cessation of a cognitive task (i.e., serial subtraction) can be associated with lingering perturbing effects on balance control.
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Affiliation(s)
- Cody A Reed
- Department of Mechanical and Industrial Engineering, Montana State University, Bozeman, MT, USA.; Sanford Orthopedics & Sports Medicine Research, Sanford Health, Sioux Falls, SD, USA
| | - Camryn K DuBois
- Department of Mechanical and Industrial Engineering, Montana State University, Bozeman, MT, USA
| | - Keith A Hutchison
- Department of Psychology, Montana State University, Bozeman, MT, USA
| | - Theodore J Huppert
- Department of Department of Electrical and Computer Engineering, University of Pittsburgh, Pittsburgh, PA, USA
| | - Scott M Monfort
- Department of Mechanical and Industrial Engineering, Montana State University, Bozeman, MT, USA..
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Čeklić U, Šarabon N, Kozinc Ž. Postural Control in Unipedal Quiet Stance in Young Female Gymnasts and the Effects of Training with Consideration of Transient Behavior of Postural Sway. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19020982. [PMID: 35055802 PMCID: PMC8775458 DOI: 10.3390/ijerph19020982] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 01/12/2022] [Accepted: 01/14/2022] [Indexed: 11/16/2022]
Abstract
The purpose of this study was twofold: (a) to compare postural control between a group of young female gymnasts (n = 15; age: 11.2 ± 1.9 years) and non-trained peers (n = 15; age: 10.9 ± 2.0 years), and (b) to investigate the effect of an 8-week whole body exercise intervention program on postural control in young female gymnasts. Postural control was assessed by recording center of pressure (CoP) movements during unipedal quiet stance. Velocity and amplitude of CoP movement in anterior-posterior (AP) and medial-lateral (ML) directions were considered. In addition to common trial-averaged CoP outcomes, we also considered the transient behavior of CoP movements, by calculating relative differences between the 1st and 2nd, and the 1st and 3rd 10-s intervals within the whole trial (DIF_21 and DIF_31, respectively). The gymnast group had lower total CoP velocity (Cohen's d = 0.97) and AP amplitude (Cohen's d = 0.85), compared to their non-trained peers. The gymnasts also had lower CoP AP amplitude DIF21 (Cohen's d = 0.73), with almost constant values across all intervals. After the training ML CoP velocity was reduced for 13.12% (Cohen's d = 0.60), while ML CoP amplitude increased (Cohen's d = -0.89).
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Affiliation(s)
- Urška Čeklić
- Faculty of Health Sciences, University of Primorska, Polje 42, SI-6310 Izola, Slovenia; (U.Č.); (N.Š.)
| | - Nejc Šarabon
- Faculty of Health Sciences, University of Primorska, Polje 42, SI-6310 Izola, Slovenia; (U.Č.); (N.Š.)
- Human Health Department, InnoRenew CoE, Livade 6, SI-6310 Izola, Slovenia
- Laboratory for Motor Control and Motor Behavior, S2P, Science to Practice, Ltd., Tehnološki Park 19, SI-1000 Ljubljana, Slovenia
| | - Žiga Kozinc
- Faculty of Health Sciences, University of Primorska, Polje 42, SI-6310 Izola, Slovenia; (U.Č.); (N.Š.)
- Andrej Marušič Institute, University of Primorska, Muzejski trg 2, SI-6000 Koper, Slovenia
- Correspondence:
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Kozinc Ž, Šarabon N. The effects of leg preference and leg dominance on static and dynamic balance performance in highly-trained tennis players. PLoS One 2021; 16:e0259854. [PMID: 34762690 PMCID: PMC8584696 DOI: 10.1371/journal.pone.0259854] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Accepted: 10/27/2021] [Indexed: 11/19/2022] Open
Abstract
In this study, 90 (51 males, 39 females) tennis players performed single-leg quiet stance and single-leg landing tasks. For the static standing task, center-of pressure (CoP) velocities, amplitudes, frequency and area were calculated. For the landing tasks, time to stabilization as well as dynamic postural stability index were considered. The analysis of differences between the legs was done based on two methods for a priori determination of leg preference, one based on the preference of kicking a ball and one based on the preference for single-leg jumping. An additional analysis was done based on the leg dominance (determined post hoc), based on the observed performance of the tasks. In case of the classification based on kicking a ball, there was a statistically significantly lower CoP anterior-posterior velocity and anterior-posterior amplitude in static balance task (p ≤ 0.017; 0.17 ≤ d ≤ 0.28) for the preferred leg. The CoP frequency was higher in the preferred leg for both directions (p ≤ 0.002; 0.10 ≤ d ≤ 0.22). For the landing task, CoP medial-lateral time to stabilization was statistically significantly shorter for the preferred leg (0.28 ± 0.38 s) compared to the non-preferred leg (0.47 ± 0.60 s) (p = 0.012; d = 0.38). There were no differences between the legs for the landing task. Moreover, there were no differences between the legs when we used the preference based on jumping for either of the tasks (d ≤ 0.14). The differences between legs in terms of observed dominance were larger than the differences based on the preference, which stresses the need for clear distinction of limb preference and limb dominance in research and practice. Regarding the effect of leg preference, small differences in static balance may exist between the legs (when the preference is based on kicking a ball).
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Affiliation(s)
- Žiga Kozinc
- University of Primorska, Faculty of Health Sciences, Izola, Slovenia
- University of Primorska, Andrej Marušič Institute, Koper, Slovenia
| | - Nejc Šarabon
- University of Primorska, Faculty of Health Sciences, Izola, Slovenia
- University of Primorska, Andrej Marušič Institute, Koper, Slovenia
- InnoRenew CoE, Human Health Department, Izola, Slovenia
- S2P, Science to Practice, Ltd., Laboratory for Motor Control and Motor Behavior, Ljubljana, Slovenia
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Kozinc Ž, Trajković N, Smajla D, Šarabon N. The Effect of Fatigue on Single-Leg Postural Sway and Its Transient Characteristics in Healthy Young Adults. Front Physiol 2021; 12:720905. [PMID: 34489739 PMCID: PMC8418113 DOI: 10.3389/fphys.2021.720905] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Accepted: 07/26/2021] [Indexed: 11/13/2022] Open
Abstract
Neuromuscular fatigue is known to impair balance ability, which is reflected in increased postural sway during quiet standing tasks. Recently, quantifying transient characteristics of postural sway has been suggested as an approach to obtain additional information regarding postural control. However, this approach is currently vastly unexplored. The purpose of this study was to investigate the effects of fatigue (induced by a repeated change of direction task) on postural sway and its transient characteristics during single-leg standing, including whole-trial estimates and indexes of transient behavior in young healthy active adults. The study involved 28 physically active students (14 females). Single-leg postural sway was recorded for 30s before and after a fatiguing protocol, which consisted of a repeated change of direction tasks. We calculated the traditional whole-trial estimates of postural sway [center-of-pressure (CoP) velocity and amplitude in anterior-posterior (AP) and medial-lateral (ML) directions] and corresponding transient behavior indexes, based on three 10-s intervals. Statistically significant sex×fatigue interaction with medium effect sizes was found for whole-trial CoP velocity in AP (p=0.028; η2=0.17) and ML directions (p=0.019; η2=0.19). Post-hoc test showed that both variables substantially decreased in female participants (p=0.041–0.045; d=0.54–0.56), but remained similar in males (p=0.194–0.294). There were small to medium statistically significant main effects of fatigue on transient index for CoP amplitude in both directions (p=0.042–0.049; η2=0.02–0.14). Notably, CoP AP amplitude increased in the first 10-s interval for males (before fatigue: 5.6±1.3mm; after fatigue: 6.3±1.6mm), while the CoP AP amplitude in the third interval remained similar after fatigue (before fatigue: 5.5±1.4mm; after fatigue: 5.1±1.2mm). In conclusion, the responses to fatigue in terms of postural sway were time interval specific, and there were certain sex-differences in responses to fatigue, which could be related to better ability to adapt balance strategies in females. Moreover, our results demonstrate that the indexes of transient behavior could perhaps detect smaller fatigue-induced changes in postural sway that are seen in whole-trial estimates.
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Affiliation(s)
- Žiga Kozinc
- Faculty of Health Sciences, University of Primorska, Izola, Slovenia.,Andrej Marušič Institute, University of Primorska, Koper, Slovenia
| | - Nebojša Trajković
- Faculty of Sport and Physical Education, University of Niš, Niš, Serbia
| | - Darjan Smajla
- Faculty of Health Sciences, University of Primorska, Izola, Slovenia.,Human Health Department, InnoRenew CoE, Izola, Slovenia
| | - Nejc Šarabon
- Faculty of Health Sciences, University of Primorska, Izola, Slovenia.,Human Health Department, InnoRenew CoE, Izola, Slovenia.,Laboratory for Motor Control and Motor Behavior, S2P, Science to Practice, Ltd., Ljubljana, Slovenia
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