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The effects of intensive dietary weight loss and exercise on gait in overweight and obese adults with knee osteoarthritis. The Intensive Diet and Exercise for Arthritis (IDEA) trial.
Messier SP, Beavers DP, Mihalko SL, Miller GD, Lyles MF, Hunter DJ, Carr JJ, Eckstein F, Guermazi A, Loeser RF, DeVita P
(2020) J Biomech 98: 109477
MeSH Terms: Aged, Exercise Therapy, Female, Gait, Humans, Knee Joint, Male, Middle Aged, Obesity, Osteoarthritis, Knee, Quality of Life, Treatment Outcome, Weight Loss
Show Abstract · Added January 10, 2020
The Intensive Diet and Exercise for Arthritis (IDEA) trial was an 18-month randomized controlled trial that enrolled 454 overweight and obese older adults with symptomatic and radiographic knee osteoarthritis (OA). Participants were randomized to either exercise (E), intensive diet-induced weight loss (D), or intensive diet-induced weight loss plus exercise (D + E) interventions. We previously reported that the clinical benefits of D + E were significantly greater than with either intervention alone (e.g., greater pain reduction, and better function, mobility, and health-related quality of life). We now test the hypothesis that D + E has greater overall benefit on gait mechanics compared to either intervention alone. Knee joint loading was analyzed using inverse dynamics and musculoskeletal modeling. Analysis of covariance determined the interventions' effects on gait. The D + E group walked significantly faster at 18-month follow-up (1.35 m s) than E (1.29 m s, p = 0.0004) and D (1.31 m s, p = 0.0007). Tibiofemoral compressive impulse was significantly lower (p = 0.0007) in D (1069 N s) and D + E (1054 N s) compared to E (1130 N s). D had significantly lower peak hip external rotation moment (p = 0.01), hip abduction moment (p = 0.0003), and peak hip power production (p = 0.016) compared with E. Peak ankle plantar flexion moment was significantly less (p < 0.0001) in the two diet groups compared with E. There also was a significant dose-response to weight loss; participants that lost >10% of baseline body weight had significantly (p = 0.0001) lower resultant knee forces and lower muscle (quadriceps, hamstring, and gastrocnemius) forces than participants that had less weight loss. Compared to E, D produces significant load reductions at the hip, knee, and ankle; combining D with E attenuates these reductions, but most remain significantly better than with E alone.
Copyright © 2019 Elsevier Ltd. All rights reserved.
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13 MeSH Terms
Aerobic exercise training improves hepatic and muscle insulin sensitivity, but reduces splanchnic glucose uptake in obese humans with type 2 diabetes.
Gregory JM, Muldowney JA, Engelhardt BG, Tyree R, Marks-Shulman P, Silver HJ, Donahue EP, Edgerton DS, Winnick JJ
(2019) Nutr Diabetes 9: 25
MeSH Terms: Adult, Diabetes Mellitus, Type 2, Exercise, Female, Glucose, Glucose Clamp Technique, Glucose Tolerance Test, Humans, Insulin Resistance, Liver, Male, Middle Aged, Muscle, Skeletal, Obesity
Show Abstract · Added September 3, 2019
BACKGROUND - Aerobic exercise training is known to have beneficial effects on whole-body glucose metabolism in people with type 2 diabetes (T2D). The responses of the liver to such training are less well understood. The purpose of this study was to determine the effect of aerobic exercise training on splanchnic glucose uptake (SGU) and insulin-mediated suppression of endogenous glucose production (EGP) in obese subjects with T2D.
METHODS - Participants included 11 obese humans with T2D, who underwent 15 ± 2 weeks of aerobic exercise training (AEX; n = 6) or remained sedentary for 15 ± 1 weeks (SED; n = 5). After an initial screening visit, each subject underwent an oral glucose load clamp and an isoglycemic/two-step (20 and 40 mU/m/min) hyperinsulinemic clamp (ISO-clamp) to assess SGU and insulin-mediated suppression of EGP, respectively. After the intervention period, both tests were repeated.
RESULTS - In AEX, the ability of insulin to suppress EGP was improved during both the low (69 ± 9 and 80 ± 6% suppression; pre-post, respectively; p < 0.05) and high (67 ± 6 and 82 ± 4% suppression, respectively; p < 0.05) insulin infusion periods. Despite markedly improved muscle insulin sensitivity, SGU was reduced in AEX after training (22.9 ± 3.3 and 9.1 ± 6.0 g pre-post in AEX, respectively; p < 0.05).
CONCLUSIONS - In obese T2D subjects, exercise training improves whole-body glucose metabolism, in part, by improving insulin-mediated suppression of EGP and enhancing muscle glucose uptake, which occur despite reduced SGU during an oral glucose challenge.
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14 MeSH Terms
NCCN Guidelines Insights: Survivorship, Version 2.2019.
Sanft T, Denlinger CS, Armenian S, Baker KS, Broderick G, Demark-Wahnefried W, Friedman DL, Goldman M, Hudson M, Khakpour N, Koura D, Lally RM, Langbaum TS, McDonough AL, Melisko M, Mooney K, Moore HCF, Moslehi JJ, O'Connor T, Overholser L, Paskett ED, Peterson L, Pirl W, Rodriguez MA, Ruddy KJ, Smith S, Syrjala KL, Tevaarwerk A, Urba SG, Zee P, McMillian NR, Freedman-Cass DA
(2019) J Natl Compr Canc Netw 17: 784-794
MeSH Terms: Body Weight Maintenance, Exercise, Guidelines as Topic, Humans, Neoplasms, Survivorship
Show Abstract · Added November 12, 2019
The NCCN Guidelines for Survivorship provide screening, evaluation, and treatment recommendations for consequences of cancer and cancer treatment to aid healthcare professionals who work with survivors of adult-onset cancer. Guidance is also provided to help promote physical activity, weight management, and proper immunizations in survivors and to facilitate care coordination to ensure that all needs are addressed. These NCCN Insights summarize some of the topics discussed by the NCCN Survivorship Panel during the 2019 update of the guidelines, including the survivorship population addressed, ways to improve care coordination, and pain management.
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6 MeSH Terms
The Effects of Pain Severity, Pain Catastrophizing, Depression, and Exercise on Perceived Disability in Acute Low Back Pain Patients.
Salt E, Wiggins AT, Hooker Q, Crofford L, Rayens MK, Segerstrom S
(2018) Res Theory Nurs Pract 32: 436-448
MeSH Terms: Adult, Catastrophization, Cross-Sectional Studies, Depressive Disorder, Disabled Persons, Exercise, Female, Humans, Low Back Pain, Male, Middle Aged, Models, Psychological, Pain Measurement, Severity of Illness Index, Surveys and Questionnaires, Young Adult
Show Abstract · Added March 25, 2020
The effectiveness of cognitive treatments for low back pain, a prevalent and costly condition, are commonly based on the principles of the Cognitive Behavioral Model of Fear of Movement/(Re)injury. In this model, persons with a painful injury/experience who also engage in pain catastrophizing are most likely to avoid activity leading to disability. The validation of this model in patients with acute low back is limited. The purpose of this project was to examine the relationship of perceived disability with variables identified in the Cognitive Behavioral Model of Fear of Movement/(Re)injury such as, pain severity, pain catastrophizing, depression, and exercise in persons with acute low back pain. A multiple linear regression model was used to assess the association of perceived disability with pain severity, pain catastrophizing, depression, and exercise at baseline among subjects with acute low back pain ( = 44) participating in a randomized clinical trial to prevent transition to chronic low back pain. Controlling for age, the overall model was significant for perceived disability ([5, 35] = 14.2; < .001). Higher scores of pain catastrophizing ( = .003) and pain severity ( < .001) were associated with higher perceived disability levels. Exercise and depression were not significantly associated with perceived disability. The use of the Cognitive Behavioral Model of Fear of Movement/(Re)injury in acute LBP patients is appropriate; because this model is commonly used as rationale for the effectiveness of cognitive treatments, these findings have clinical relevance in the treatment of this condition.
© 2018 Springer Publishing Company, LLC.
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MeSH Terms
The association between endogenous opioid function and morphine responsiveness: a moderating role for endocannabinoids.
Bruehl S, Burns JW, Morgan A, Koltyn K, Gupta R, Buvanendran A, Edwards D, Chont M, Kingsley PJ, Marnett L, Stone A, Patel S
(2019) Pain 160: 676-687
MeSH Terms: Adult, Analgesics, Opioid, Chronic Pain, Double-Blind Method, Endocannabinoids, Exercise, Female, Humans, Low Back Pain, Male, Middle Aged, Morphine, Naloxone, Opioid Peptides, Pain Measurement, Regression Analysis, Surveys and Questionnaires, Treatment Outcome
Show Abstract · Added April 12, 2019
We sought to replicate previous findings that low endogenous opioid (EO) function predicts greater morphine analgesia and extended these findings by examining whether circulating endocannabinoids and related lipids moderate EO-related predictive effects. Individuals with chronic low-back pain (n = 46) provided blood samples for endocannabinoid analyses, then underwent separate identical laboratory sessions under 3 drug conditions: saline placebo, intravenous (i.v.) naloxone (opioid antagonist; 12-mg total), and i.v. morphine (0.09-mg/kg total). During each session, participants rated low-back pain intensity, evoked heat pain intensity, and nonpain subjective effects 4 times in sequence after incremental drug dosing. Mean morphine effects (morphine-placebo difference) and opioid blockade effects (naloxone-placebo difference; to index EO function) for each primary outcome (low-back pain intensity, evoked heat pain intensity, and nonpain subjective effects) were derived by averaging across the 4 incremental doses. The association between EO function and morphine-induced back pain relief was significantly moderated by endocannabinoids [2-arachidonoylglycerol (2-AG) and N-arachidonoylethanolamine (AEA)]. Lower EO function predicted greater morphine analgesia only for those with relatively lower endocannabinoids. Endocannabinoids also significantly moderated EO effects on morphine-related changes in visual analog scale-evoked pain intensity (2-AG), drug liking (AEA and 2-AG), and desire to take again (AEA and 2-AG). In the absence of significant interactions, lower EO function predicted significantly greater morphine analgesia (as in past work) and euphoria. Results indicate that EO effects on analgesic and subjective responses to opioid medications are greatest when endocannabinoid levels are low. These findings may help guide development of mechanism-based predictors for personalized pain medicine algorithms.
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18 MeSH Terms
The Relationship Between Life Purpose With Depression and Disability in Acute Low Back Pain Patients.
Salt E, Wiggins AC, Rayens MK, Johnson R, Hardy JK, Segerstrom S, Crofford LJ
(2018) Orthop Nurs 37: 287-291
MeSH Terms: Adult, Aged, Depression, Disabled Persons, Exercise Therapy, Female, Humans, Linear Models, Low Back Pain, Male, Middle Aged, Pain Measurement, Treatment Outcome
Show Abstract · Added March 25, 2020
BACKGROUND - Life purpose in acute low back pain patients is not well described in published literature.
METHODS/PURPOSE - We used linear regression models to describe the relationship of life purpose with perceived functional disability and depression in persons with acute low back pain (N = 42) participating in a randomized clinical trial to prevent transition to chronic low back pain.
RESULTS - In our predominantly female sample (81.8%) with a mean age of 53 years (SD = 11.6 years), 52% worked full-time. Adjusting for age, gender, and working status, life purpose was a significant correlate of depression (p = .007). For every 10-unit increase in life purpose score, the estimated depression score decreased by almost 2.5 points. A significant relationship between life purpose and perceived functional disability was not identified.
CONCLUSION - Life purpose likely is a modifiable risk factor for depression in acute low back pain patients.
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MeSH Terms
Physical activity is related to function and fatigue but not pain in women with fibromyalgia: baseline analyses from the Fibromyalgia Activity Study with TENS (FAST).
Merriwether EN, Frey-Law LA, Rakel BA, Zimmerman MB, Dailey DL, Vance CGT, Golchha M, Geasland KM, Chimenti R, Crofford LJ, Sluka KA
(2018) Arthritis Res Ther 20: 199
MeSH Terms: Adult, Aged, Double-Blind Method, Exercise, Fatigue, Female, Fibromyalgia, Humans, Middle Aged, Pain, Pain Measurement, Quality of Life, Surveys and Questionnaires, Transcutaneous Electric Nerve Stimulation, Treatment Outcome, Young Adult
Show Abstract · Added March 25, 2020
BACKGROUND - Although exercise is an effective treatment for fibromyalgia, the relationships between lifestyle physical activity and multiple symptomology domains of fibromyalgia are not clear. Thus, the purpose of this study was to comprehensively examine the relationships between lifestyle physical activity with multiple outcome domains in women with fibromyalgia, including pain, fatigue, function, pain-related psychological constructs, and quality of life.
METHODS - Women (N = 171), aged 20 to 70 years, diagnosed with fibromyalgia, recruited from an ongoing two-site clinical trial were included in this prespecified subgroup analysis of baseline data. Physical activity was assessed using self-report and accelerometry. Symptomology was assessed using questionnaires of perceived physical function, quality of life, fatigue, pain intensity and interference, disease impact, pain catastrophizing, and fear of movement. In addition, quantitative sensory testing of pain sensitivity and performance-based physical function were assessed. Correlation coefficients, regression analyses and between-group differences in symptomology by activity level were assessed, controlling for age and body mass index (BMI).
RESULTS - Lifestyle physical activity was most closely associated with select measures of physical function and fatigue, regardless of age and BMI. Those who performed the lowest levels of lifestyle physical activity had poorer functional outcomes and greater fatigue than those with higher physical activity participation. No relationships between lifestyle physical activity and pain, pain sensitivity, or pain-related psychological constructs were observed.
CONCLUSIONS - Lifestyle physical activity is not equally related to all aspects of fibromyalgia symptomology. Lifestyle physical activity levels have the strongest correlations with function, physical quality of life, and movement fatigue in women with fibromyalgia. No relationships between lifestyle physical activity and pain, pain sensitivity, or psychological constructs were observed. These data suggest that physical activity levels are more likely to affect function and fatigue, but have negligible relationships with pain and pain-related psychological constructs, in women with fibromyalgia.
TRIAL REGISTRATION -, NCT01888640 . Registered on 28 June 2013.
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Exercise is Associated With Increased Small HDL Particle Concentration and Decreased Vascular Stiffness in Rheumatoid Arthritis.
Byram KW, Oeser AM, Linton MF, Fazio S, Stein CM, Ormseth MJ
(2018) J Clin Rheumatol 24: 417-421
MeSH Terms: Aged, Arthritis, Rheumatoid, Blood Pressure, C-Reactive Protein, Cardiovascular Diseases, Cholesterol, HDL, Cross-Sectional Studies, Exercise, Female, Follow-Up Studies, Humans, Incidence, Magnetic Resonance Spectroscopy, Male, Middle Aged, Reference Values, Risk Assessment, Self Report, Severity of Illness Index, Vascular Stiffness
Show Abstract · Added April 10, 2019
OBJECTIVE - Patients with rheumatoid arthritis (RA) have increased cardiovascular (CV) risk. In the general population, exercise improves several CV risk factors. In a cross-sectional study, we examined the hypothesis that more exercise is associated with protective traditional and non-traditional CV risk factor profile in patients with RA.
METHODS - Patient-reported exercise outside of daily activities was quantified by time and metabolic equivalents per week (METmin/week) and CV risk factors including blood pressure, standard lipid profiles, lipoprotein particle concentrations (NMR spectroscopy), and vascular indices were measured in 165 patients with RA. The relationship between exercise and CV risk factors was assessed according to whether patients exercised or not, and after adjustment for age, race and sex.
RESULTS - Over half (54%) of RA patients did not exercise. Among those who did exercise, median value for exercise duration was 113 min/week [IQR: 60, 210], and exercise metabolic equivalent expenditure was 484 METmin/week [IQR: 258, 990]. Disease activity (measured by DAS28 score), C-reactive protein, waist-hip ratio, and prevalence of hypertension were lower in patients who exercised compared to those who did not (all p-values < 0.05) but standard lipid profile and body mass index were not significantly different. Patients who exercised had significantly higher concentrations of HDL particles (p = 0.004) and lower vascular stiffness as measured by pulse wave velocity (p = 0.005).
CONCLUSIONS - More self-reported exercise in patients with RA was associated with a protective CV risk factor profile including lower waist-hip ratio, higher HDL particle concentration, lower vascular stiffness, and a lower prevalence of hypertension.
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20 MeSH Terms
Long-term Diet Quality and Risk of Type 2 Diabetes Among Urban Chinese Adults.
Yu D, Zheng W, Cai H, Xiang YB, Li H, Gao YT, Shu XO
(2018) Diabetes Care 41: 723-730
MeSH Terms: Adult, Aged, Asian Continental Ancestry Group, China, Diabetes Mellitus, Type 2, Diet, Exercise, Feeding Behavior, Female, Food Quality, Humans, Leisure Activities, Male, Middle Aged, Obesity, Risk Factors, Surveys and Questionnaires, Urban Population
Show Abstract · Added March 26, 2018
OBJECTIVE - Little evidence exists regarding long-term diet quality and the risk of type 2 diabetes among Asian populations, who have undergone a nutrition transition and a diabetes epidemic.
RESEARCH DESIGN AND METHODS - A total of 117,919 Chinese men and women, 40-74 years old, free of diabetes, cardiovascular disease, and cancer at baseline, were followed from 1996 to 2015. Diet quality was assessed by a healthy diet score (HDS) based on eight commonly consumed food groups previously suggested to be related to diabetes. Long-term diet quality and its changes were assessed by repeated surveys using food-frequency questionnaires.
RESULTS - We identified 6,111 incident diabetes cases during a mean follow-up of 11.5 years. Higher HDS was associated with lower diabetes risk (hazard ratio [HR] 0.85 [95% CI 0.78-0.92] in the highest vs. lowest quintile, <0.0001) after adjustment for potential confounders including BMI. Maintaining a high HDS during follow-up was associated with 26% lower risk compared with a consistently low HDS (HR 0.74 [95% CI 0.63-0.85]). The inverse association between HDS and diabetes was observed regardless of participants' age, sex, smoking and exercise habits, obesity status, and metabolic disease status but was more prominent among those who participated in leisure-time exercise ( = 0.004). When considered jointly, a sustained high HDS plus exercise was associated with a 45% reduced risk of diabetes (HR 0.55 [95% CI 0.45-0.67]).
CONCLUSIONS - A high-quality diet, especially maintained over the long term and in conjunction with leisure-time exercise, is associated with lower risk of type 2 diabetes among urban Chinese adults.
© 2017 by the American Diabetes Association.
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AMPK in skeletal muscle function and metabolism.
Kjøbsted R, Hingst JR, Fentz J, Foretz M, Sanz MN, Pehmøller C, Shum M, Marette A, Mounier R, Treebak JT, Wojtaszewski JFP, Viollet B, Lantier L
(2018) FASEB J 32: 1741-1777
MeSH Terms: Adaptation, Physiological, Animals, Energy Metabolism, Exercise, Humans, Muscle, Skeletal, Protein Kinases
Show Abstract · Added May 16, 2019
Skeletal muscle possesses a remarkable ability to adapt to various physiologic conditions. AMPK is a sensor of intracellular energy status that maintains energy stores by fine-tuning anabolic and catabolic pathways. AMPK's role as an energy sensor is particularly critical in tissues displaying highly changeable energy turnover. Due to the drastic changes in energy demand that occur between the resting and exercising state, skeletal muscle is one such tissue. Here, we review the complex regulation of AMPK in skeletal muscle and its consequences on metabolism ( e.g., substrate uptake, oxidation, and storage as well as mitochondrial function of skeletal muscle fibers). We focus on the role of AMPK in skeletal muscle during exercise and in exercise recovery. We also address adaptations to exercise training, including skeletal muscle plasticity, highlighting novel concepts and future perspectives that need to be investigated. Furthermore, we discuss the possible role of AMPK as a therapeutic target as well as different AMPK activators and their potential for future drug development.-Kjøbsted, R., Hingst, J. R., Fentz, J., Foretz, M., Sanz, M.-N., Pehmøller, C., Shum, M., Marette, A., Mounier, R., Treebak, J. T., Wojtaszewski, J. F. P., Viollet, B., Lantier, L. AMPK in skeletal muscle function and metabolism.
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