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Nutritional Challenges in Metabolic Syndrome.
Hoyas, I, Leon-Sanz, M
Journal of clinical medicine. 2019;8(9)
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Metabolic syndrome is a cluster of symptoms and risk factors for cardiovascular disease where the main therapeutic treatment is focused on weight loss and improvements in insulin sensitivity. However, there is no one dietary therapy that works for everyone, so weight reduction is often approached differently. Common dietary plans involve calorie reduction, low-carbohydrate, low-fat or a lifestyle-based approach such as the Mediterranean diet. What is scientifically accepted is that the different macronutrients each play a role in promoting weight loss. An elevated intake of high GI carbohydrates can cause insulin resistance over time. High fibre foods can help mitigate this as well as supporting satiety. There is a lot more focus on low carb, low GI and ketogenic diets. Fat intake has also been studied intensely and different lipids can influence cholesterol and other cardiovascular markers. Omega-3 fatty acids have been shown to be especially healthful. Limiting saturated and trans fats, added sugars, and sodium is also considered a healthy pattern. Proteins are associated with increased satiety and maintaining muscle mass. Each dietary pattern has a different metabolic effect although calorie restriction is typically the more effective intervention for metabolic intervention.
Abstract
Metabolic Syndrome (MetS) is a combination of risk factors for the development of cardiovascular disease (CVD) and type 2 diabetes. Different diagnostic criteria were proposed, but a consensus was reached in 2009 based on values of waist circumference, blood pressure, fasting glycemia, triglycerides, and high-density lipoprotein (HDL)-cholesterol levels. The main underlying etiologic factor is insulin resistance. The quality and quantity of individual macronutrients have an influence on the development and resolution of this syndrome. However, the main treatment goal is weight loss and a decrease in insulin resistance. A controlled energy dietary recommendation, together with moderate levels of physical activity, may positively change the parameters of MetS. However, there is no single dietary or exercise prescription that works for all patients. Dietary patterns such as Mediterranean-style, dietary approaches to stop hypertension (DASH), low-carbohydrate, and low-fat diets can ameliorate insulin resistance and MetS. Long-term adherence to a healthy lifestyle is key in assuring that individuals significantly reduce the risk of CVD and diabetes mellitus.
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Potential unintended consequences of graphic warning labels on sugary drinks: do they promote obesity stigma?
Hayward, LE, Vartanian, LR
Obesity science & practice. 2019;5(4):333-341
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Consumption of sugar-sweetened beverages is associated with increased body weight and poor nutrition and health outcomes, including Type 2 diabetes and coronary heart disease. The aim of this study was to test the hypothesis that the graphic warning promotes weight bias (Study 1) and is also viewed as stigmatizing by people with overweight and obesity (Study 2). Study 1 Participants were randomly allocated to one of two conditions: a warning label condition (n = 324) or a control condition (n = 357). Results indicate that participants who were presented with the graphic warning label were more likely to intend to purchase water (instead of the soda) than participants who were presented with the standard label. Study 2 Participants (n=561) were randomly assigned to one of two conditions – overweight or obese. Results show that the majority of participants rated the warning label as personally stigmatizing. Moreover, after being exposed to the label, the participants experienced worse mood. Authors conclude that it is important for policymakers to strike a balance between the benefits and costs of public health interventions.
Abstract
INTRODUCTION Public health interventions need to balance the benefits with any potential harms. One proposed intervention for reducing sugar-sweetened beverage consumption involves placing graphic warning labels on products and advertisements. A recent study found that a graphic warning label that contained negative imagery of obesity reduced purchases of sugar-sweetened beverages. However, these labels may also promote obesity stigma, which is concerning given that weight stigma is associated with harmful health consequences including weight gain and increased risk of mortality. METHODS In Study 1 (n = 681), participants viewed a standard soda label or the graphic warning label online and then completed measures of disgust and prejudice towards people with obesity. In Study 2 (n = 506), participants who identified as having overweight or obesity viewed the graphic warning label online before or after completing measures of mood and state self-esteem. RESULTS In Study 1, participants who had viewed the graphic warning label reported higher disgust and weight bias. In Study 2, the majority of participants perceived the warning label to be stigmatizing, and participants displayed worse mood and, through this, lower self-esteem after viewing the label. CONCLUSIONS Although the graphic warning label has been found to reduce sugary drink purchases, it also promotes obesity stigma and is perceived as stigmatizing by individuals with overweight and obesity. Given that weight stigma predicts harmful health and well-being consequences, the benefits of graphic warning labels need to be balanced against the potential costs.
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Examining Weight Bias among Practicing Canadian Family Physicians.
Alberga, AS, Nutter, S, MacInnis, C, Ellard, JH, Russell-Mayhew, S
Obesity facts. 2019;12(6):632-638
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Weight bias represents negative attitudes and beliefs about individuals because of their weight. The aim of this study was to examine: a. weight bias in a national sample of family physicians in Canada, b. the relationships between weight bias, attitudes about treating patients with obesity, and how people with obesity are perceived as a burden to the public healthcare system. A probability sample of 400 currently practicing family physicians completed the survey by phone or online. Results show that most respondents were white (63.3%) men (61.3%) aged 45 years or older. The average total score of explicit weight bias was 2.95 (1.17) evaluated on a 7-point Likert scale. Furthermore, although weight bias was not present in the majority of the sample, it was present among some physicians. Authors conclude that future work is needed to investigate weight bias reduction techniques targeted at physicians.
Abstract
OBJECTIVES The aim of this study was to examine the attitudes of practicing Canadian family physicians about individuals with obesity, their healthcare treatment, and perceptions of obesity treatment in the public healthcare system. METHOD A national sample of Canadian practicing family physicians (n = 400) completed the survey. Participants completed measures of explicit weight bias, attitudes towards treating patients with obesity, and perceptions that people with obesity increase demand on the public healthcare system. RESULTS Responses consistent with weight bias were not observed overall but were demonstrated in a sizeable minority of respondents. Many physicians also reported feeling frustrated with patients with obesity and agreed that people with obesity increase demand on the public healthcare system. Male physicians had more negative attitudes than females. More negative attitudes towards treating patients with obesity were associated with greater perceptions of them as a public health demand. CONCLUSION Results suggest that negative attitudes towards patients with obesity exist among some family physicians in Canada. It remains to be determined if physicians develop weight bias partly because they blame individuals for their obesity and its increased demand on the Canadian public healthcare system. More research is needed to better understand causes and consequences of weight bias among health professionals and make efforts towards its reduction in healthcare.
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Change in physical activity and quality of life in endometrial cancer survivors receiving a physical activity intervention.
Robertson, MC, Lyons, EJ, Song, J, Cox-Martin, M, Li, Y, Green, CE, Pinto, BM, Carmack, CL, Harrison, C, Baum, G, et al
Health and quality of life outcomes. 2019;17(1):91
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Endometrial cancer survivors suffer from high rates of obesity and physical activity-related co-morbidities that are related to cancer-specific and overall mortality. The aim of this study was to investigate how change in physical activity over time related to change in multiple, specific measures of quality of life for endometrial cancer survivors receiving a physical activity intervention. This study was a one-group, pre-post design which recruited 100 women diagnosed with stage I, II, or IIIa endometrial cancer. Each participant received a customized exercise prescription that was based on the results of baseline fitness tests. Results indicate change in physical activity was positively associated with change in SF-36 (Short Form Health Survey) subscale scores for role limitations due to physical health and general health. Furthermore, change in physical activity was negatively associated with change in pain and somatic distress. Authors conclude that increasing physical activity was positively associated with improvements in role limitation due to physical health, general health, pain, and somatic distress.
Abstract
BACKGROUND Endometrial cancer survivors are at an increased risk of poor quality of life outcomes. Physical activity is positively associated with general quality of life in this population, however, little is known about how changes in physical activity may be associated with changes in specific aspects of quality of life. The aim of this secondary data analysis was to explore the relationships between change in physical activity and change in physical, mental, social, and other aspects of quality of life in endometrial cancer survivors receiving a physical activity intervention. METHODS Endometrial cancer survivors (N = 100) participated in a telephone-based physical activity intervention for six months. At baseline and post-intervention we measured physical activity via accelerometry and ecological momentary assessment, and quality of life via the Short Form Health Survey (SF-36), the Quality of Life of Adult Cancer Survivors instrument, the Brief Symptom Inventory, the Pittsburgh Sleep Quality Index, and the Perceived Stress Scale. We conducted structural equation modeling path analyses to investigate how physical activity post-intervention was associated with the quality of life measures' subscales post-intervention, adjusting for baseline levels and potentially confounding covariates. RESULTS Increasing physical activity was positively associated with improvements in general health (p = .044), role limitation due to physical health (p = .005), pain (p = .041), and somatic distress (p = .023). There was no evidence to indicate that change in physical activity was associated with change in other aspects of quality of life. CONCLUSIONS Endometrial cancer survivors are at higher risk for suffering from challenges to physical quality of life, and findings from this study suggest that increasing physical activity may alleviate some of these problems. Further research is needed to determine whether other aspects of quality of life are linked to change in physical activity. TRIAL REGISTRATION Trial registration number: NCT00501761 Name of registry: clinicaltrials.gov Date of registration: July 16, 2007. Date of enrollment: June 16, 2005.
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Association of the Functional Medicine Model of Care With Patient-Reported Health-Related Quality-of-Life Outcomes.
Beidelschies, M, Alejandro-Rodriguez, M, Ji, X, Lapin, B, Hanaway, P, Rothberg, MB
JAMA network open. 2019;2(10):e1914017
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The functional medicine model of care provides an operating system that works to reverse illness, promote health, and optimize function by addressing underlying causes, symptoms, and functional imbalances in interconnected biological networks. The aim of this study was to investigate the association between the functional medicine model of care and health-related quality of life (HRQoL) by comparing functional medicine with care received in a family medicine setting. The study is a single-centre retrospective cohort study which recruited 7252 new patients. The study evaluated the association of HRQoL in patients receiving functional medicine care vs patients receiving primary care. Results indicate that clients seen at the Centre for Functional Medicine were more likely to experience a clinically meaningful change in their (patient-reported outcome measurement information system and global physical health) scores at 6 months, which was less likely to decrease over time. Authors conclude that the functional medicine model of care may have beneficial and sustainable associations with improved HRQoL in patients as measured by patient-reported outcome measurement information system, global physical health and global mental health scores.
Abstract
Importance: The incidence of chronic disease is increasing along with health care-related costs. The functional medicine model of care provides a unique operating system to reverse illness, promote health, and optimize function. The association between this model of care and patient's health-related quality of life (HRQoL) is unknown. Objective: To assess the association between functional medicine and patient-reported HRQoL using Patient-Reported Outcome Measurement Information System (PROMIS) global health measures. Design, Setting, and Participants: A retrospective cohort study was performed to compare 7252 patients aged 18 years or older treated in a functional medicine setting with propensity score (PS)-matched patients in a primary care setting. Sensitivity analyses assessed improvement limited to patients seen at both 6 and 12 months. The study included patients who visited the Cleveland Clinic Center for Functional Medicine or a Cleveland Clinic family health center between April 1, 2015, and March 1, 2017. Main Outcomes and Measures: The primary outcome was change in PROMIS Global Physical Health (GPH) at 6 months. Secondary outcomes included PROMIS Global Mental Health (GMH) at 6 months and PROMIS GPH and GMH at 12 months. The PROMIS GPH and GMH scores were transformed to a T-score from 0 to 100 with a mean of 50. Higher scores indicate a better health-related quality of life. Results: Of the 7252 patients (functional medicine center: 1595; family health center: 5657), 4780 (65.9%) were women; mean (SD) age was 54.1 (16.0) years. At 6 months, functional medicine patients exhibited significantly larger improvements in PROMIS GPH T-score points than were seen in patients treated at a family health center (mean [SD] change, functional medicine center: 1.59 [6.29] vs family health center: 0.33 [6.09], P = .004 in 398 PS-matched pairs). At 12 months, functional medicine patients showed improvement similar to that observed at 6 months; however, comparisons with patients seen at the family health center were not significant. Patients in the functional medicine center with data at both 6 and 12 months demonstrated improvements in PROMIS GPH (mean [SD], 2.61 [6.53]) that were significantly larger compared with patients seen at a family health center (mean [SD], 0.25 [6.54]) (P = .02 in 91 PS-matched pairs). Conclusions and Relevance: In this study, the functional medicine model of care demonstrated beneficial and sustainable associations with patient-reported HRQoL. Prospective studies are warranted to confirm these findings.
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The Effectiveness of Intermittent Fasting to Reduce Body Mass Index and Glucose Metabolism: A Systematic Review and Meta-Analysis.
Cho, Y, Hong, N, Kim, KW, Cho, SJ, Lee, M, Lee, YH, Lee, YH, Kang, ES, Cha, BS, Lee, BW
Journal of clinical medicine. 2019;8(10)
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Calorie restriction (CR) is known to reduce body weight and to improve various cardiovascular risk factors. Due to the many difficulties in sustaining daily CR, intermittent fasting (IF) has been proposed as an alternative strategy for achieving and maintaining weight reduction. The aim of this study was to investigate the effectiveness of IF on weight loss and glucose metabolism by analysing the effect size of previous studies among the general population without diabetes mellitus. A total of 12 studies were included in this study. The total number of participants was 545 (261 in the intervention group and 284 in the control group). Study analysis indicates an improvement in glycaemic control and insulin resistance through IF diet as compared with a non-fasting control group. Lean mass was relatively conserved in the IF diet group however, no significant weight reduction was identified. Authors conclude that IF diet may improve fat distribution in the general population without chronic metabolic disease.
Abstract
The effects of an intermittent fasting diet (IFD) in the general population are still controversial. In this study, we aimed to systematically evaluate the effectiveness of an IFD to reduce body mass index and glucose metabolism in the general population without diabetes mellitus. Cochrane, PubMed, and Embase databases were searched to identify randomized controlled trials and controlled clinical trials that compared an IFD with a regular diet or a continuous calorie restriction diet. The effectiveness of an IFD was estimated by the weighted mean difference (WMD) for several variables associated with glucometabolic parameters including body mass index (BMI) and fasting glucose. The pooled mean differences of outcomes were calculated using a random effects model. From 2814 studies identified through a literature search, we finally selected 12 articles (545 participants). Compared with a control diet, an IFD was associated with a significant decline in BMI (WMD, -0.75 kg/m2; 95% CI, -1.44 to -0.06), fasting glucose level (WMD, -4.16 mg/dL; 95% CI, -6.92 to -1.40), and homeostatic model assessment of insulin resistance (WMD, -0.54; 95% CI, -1.05 to -0.03). Fat mass (WMD, -0.98 kg; 95% CI, -2.32 to 0.36) tended to decrease in the IFD group with a significant increase in adiponectin (WMD, 1008.9 ng/mL; 95% CI, 140.5 to 1877.3) and a decrease in leptin (WMD, -0.51 ng/mL; 95% CI, -0.77 to -0.24) levels. An IFD may provide a significant metabolic benefit by improving glycemic control, insulin resistance, and adipokine concentration with a reduction of BMI in adults.
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Soy Products Ameliorate Obesity-Related Anthropometric Indicators in Overweight or Obese Asian and Non-Menopausal Women: A Meta-Analysis of Randomized Controlled Trials.
Mu, Y, Kou, T, Wei, B, Lu, X, Liu, J, Tian, H, Zhang, W, Liu, B, Li, H, Cui, W, et al
Nutrients. 2019;11(11)
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With obesity on the rise this analysis of 22 trials and a total of 870 overweight or obese adults looks at whether soy products are effective food for weight loss. Sixteen trials examined soy products and Body Mass Index (BMI) and concluded that soy products significantly reduced body mass compared to the control groups. The remaining studies examined the effects of soy on fat mass, fat percentage, and waist and hip circumference and showed declines in fat mass but not significant reductions in waist and hip measurements. The amalgamated results showed a total reduction of 0.34 kg body weight. Various types of soy products were included such as soy protein, isoflavones, soy milk, soy shakes and some other soy products. Further sub-group analysis showed differences in people from developed countries (typically a BMI higher than 25.0) versus developing countries (average BMI lower than 25.0). They also highlighted differences between cultures with meat-based and plant-based diets and the wide acceptance of soy in Asia. Significant effects were observed in non-menopausal women with reduced body weight, BMI and waist circumference, while no results were observed in postmenopausal women. The study concludes that soy protein, isoflavones and fibre all contribute to fullness and signalling pathways which may be helpful in reducing body weight.
Abstract
BACKGROUND The effect of soy products on the weight of overweight or obese people is controversial, so we aimed to conduct a systematic review and a meta-analysis of published randomized controlled trials to analyze whether supplementation with soy products can help them to lose weight. METHODS The relevant data before January 2019 in PubMed, Embase and Cochrane Library were searched. A random-effect model was adopted to calculate the weighted average difference of net changes of body weight, body mass index (BMI), body fat percentage, fat mass, waist circumference, etc. Results: A total of 22 trials (870 overweight or obese participants) were reflected in the present meta-analysis. Analysis showed that soy products significantly reduced body weight, BMI, body fat percent and waist circumference in overweight or obese Asian populations (-0.37 kg, P = 0.010; -0.27 kg/m2, P = 0.042; -0.36%, P = 0.032; -0.35 cm, P = 0.049) and more significant effects were observed in non-menopausal women reduced body weight (-0.59 kg, P = 0.041), BMI (-0.59, P = 0.041) and waist circumference (-0.59 cm, P = 0.041) in overweight or obese populations. CONCLUSION This meta-analysis showed that soy products have weight loss effects, mainly due to soy protein, isoflavone and soy fiber.
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Timing of Breakfast, Lunch, and Dinner. Effects on Obesity and Metabolic Risk.
Lopez-Minguez, J, Gómez-Abellán, P, Garaulet, M
Nutrients. 2019;11(11)
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Timing of food intake is an emerging factor that may predict the success of weight loss therapies. The aim of this review is to explore the timing of the three main meals of the day, breakfast, lunch and dinner, and the impact that eating during the biological night can have on metabolism, glucose tolerance, and obesity-related factors. The review shows that the timing of food intake is an external synchronizer and plays a crucial role in obesity and weight loss treatment. Breakfast skipping is causally linked to obesity and late lunch (after 3 p.m.) hinders weight loss, mainly in those carriers of a genetic variant in Perilipin. Furthermore, a late lunch has a deleterious effect on microbiota diversity and composition whereas late dinner (within two hours before bedtime) decreases glucose tolerance. Authors conclude that modifying food-timing may be a potential tool to decrease obesity and metabolic risk.
Abstract
(1) Background: Eating is fundamental to survival. Animals choose when to eat depending on food availability. The timing of eating can synchronize different organs and tissues that are related to food digestion, absorption, or metabolism, such as the stomach, gut, liver, pancreas, or adipose tissue. Studies performed in experimental animal models suggest that food intake is a major external synchronizer of peripheral clocks. Therefore, the timing of eating may be decisive in fat accumulation and mobilization and affect the effectiveness of weight loss treatments. (2) Results: We will review multiple studies about the timing of the three main meals of the day, breakfast, lunch and dinner, and its potential impact on metabolism, glucose tolerance, and obesity-related factors. We will also delve into several mechanisms that may be implicated in the obesogenic effect of eating late. Conclusion: Unusual eating time can produce a disruption in the circadian system that might lead to unhealthy consequences.
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Medium-term effects of a two-desk sit/stand workstation on cognitive performance and workload for healthy people performing sedentary work: a secondary analysis of a randomised controlled trial.
Schwartz, B, Kapellusch, JM, Baca, A, Wessner, B
Ergonomics. 2019;62(6):794-810
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Prolonged sitting is a risk factor for several diseases and may negatively affect cognitive performance and comfort. The primary aim of this two-arm, randomised controlled cross-over trial was to evaluate the medium-term effect of a two-desk sit/stand workstation on typical office work related cognitive performance parameters (i.e. working speed, reaction time, concentration performance, accuracy) and workload (i.e. cost of accomplishing tasks). 18 office workers were randomly allocated to either an intervention arm or a control arm . Participants in the intervention arm were placed on either a traditional desk or a sit/stand desk for 23 weeks, and swapped to the other type of desk for another 23 weeks after a 6 week washout period. Participants in the control arm sat on a traditional desk for the whole duration of the study. There were no significant differences in working speed, concentration performance and reaction time between groups. Although sitting time was reduced there was no overall increase in physical activity with the sit/stand desk which is believed to relieve mental fatigue and hence improve cognitive performance. Text editing accuracy, as well as salivary cortisol levels, significantly increased for sit/stand users, suggesting that the intervention induced lower mental fatigue states. The authors conclude that larger and longer studies are needed to evaluate the benefits of sit/stand workstations on cognitive performance.
Abstract
Implementing sit/stand workstations in sedentary work environments is a common way to reduce sedentary time, but their medium-term effect on cognitive performance is unclear. To address this circumstance, eighteen office workers participated in a two-arm, randomised controlled cross-over trial (ClinicalTrials.gov Identifier: NCT02825303), either working at a traditional (sit) or an interventional (sit/stand) workplace for 23 weeks. Cognitive performance (working speed, reaction time, concentration performance, accuracy), workload and relevant covariates (salivary cortisol level, heart rate, physical activity, sitting time) were measured pre- and post-intervention under laboratory conditions. MANOVA and RMANOVA results did not show differences in performance parameters and workload, respectively, between sit/stand and traditional workplace users. Differences in text editing accuracy and cortisol levels for sit/stand workstation users indicate potential connectivity to cognitive parameters which should be further examined with large-scale studies. Practitioner summary: Medium-term effects of working at sit/stand workstations on cognitive performance and workload are unexplored. This randomised controlled trial suggests that cognitive performance and workload are unaffected for sit/stand workstation users after 23 weeks of use. However, accuracy appeared to improve and physiological stress appeared to be altered. Abbreviations: BMI: body mass index; IPAQ International physical activity questionnaire; MET: metabolic equivalent of task; MANOVA multivariate ANOVA; NASA TLX NASA task load index; RMANOVA repeated measures ANOVA.
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Effects of a lower extremity exercise program on gait biomechanics and clinical outcomes in children and adolescents with obesity: A randomized controlled trial.
Horsak, B, Schwab, C, Baca, A, Greber-Platzer, S, Kreissl, A, Nehrer, S, Keilani, M, Crevenna, R, Kranzl, A, Wondrasch, B
Gait & posture. 2019;70:122-129
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Findings through studies place overweight and obesity as one of the most critical and accelerating global health issues. Besides the commonly linked health risks of obesity and overweight, literature also highlights that they may result in an increased risk of developing unfavourable gait patterns and lower-extremity skeletal malalignments. The main aim of this study was to evaluate an exercise programme (EP) that combines strength and neuromuscular exercises from a knee health and muscle strength perspective. The study is a single blinded, randomised controlled study which enrolled 51 children and adolescents aged between 10 and 18 years of age. The participants were randomly assigned to one of the two groups: EP group or control group. Results indicate that the EP was able to modify biomechanical gait patterns at the pelvic and hip level. Furthermore, results did not show any changes in relation to pain or other clinical symptoms. Authors conclude that EP might be an effective short-term possibility to counteract the progressive development of biomechanical malalignments of the lower extremity.
Abstract
BACKGROUND Research highlights the detrimental effects of obesity on gait biomechanics and the accompanied risk of lower-extremity skeletal malalignments, increased joint stress, pain and discomfort. Individuals with obesity typically show increased knee valgus angles combined with an increased step width. Accompanying muscular dysfunctions impede their ability to compensate for these alterations, especially in the frontal plane. To date, no studies are available, which evaluated the potential effects of an exercise program (EP) in reducing these unfavorable biomechanical changes. RESEARCH QUESTIONS Is a 12-week EP, which includes hip abductor and knee extensor strength exercises and fosters dynamic knee alignment, effective in positively altering gait biomechanics in children and adolescents with obesity? METHODS This study was a randomized controlled trial having children and adolescents with obesity assigned to an EP (n = 19) or control (n = 16) group. Pain, self-rated knee function, muscle strength and 3D gait analysis during walking and stair climbing were evaluated. RESULTS Results indicate that the EP was able to increase muscular strength especially in the hip abductors. In addition, children from the EP group walked with less maximum hip adduction and reduced pelvic drop during weight acceptance at follow-up. No changes were present in self-rated knee function, pain or discomfort. SIGNIFICANCE Even though effects were small, results indicate that an EP is an effective short-term possibility to counteract the progressive development of biomechanical malalignments of the lower extremity. Clinical parameters indicated that the program was feasible. Nonetheless, low adherence highlights the need to develop more attractive programs. CLINICAL TRIALS REG. NO: clinicaltrials.gov (NCT02545764).