scholarly journals Executive Functioning as a Predictor of Weight Loss and Physical Activity Outcomes

2019 ◽  
Vol 53 (10) ◽  
pp. 909-917 ◽  
Author(s):  
Meghan L Butryn ◽  
Mary K Martinelli ◽  
Jocelyn E Remmert ◽  
Savannah R Roberts ◽  
Fengqing Zhang ◽  
...  
Keyword(s):  
Physical Activity ◽  
Weight Loss ◽  
Executive Functioning ◽  
Behavioral Treatment ◽  
Lifestyle Modification ◽  
Objective Measure ◽  
Registration Number ◽  
Task Component ◽  
Predict Weight Loss ◽  
Objectively Measured

Abstract Background Executive functioning, which is fundamental for carrying out goal-directed behaviors, may be an underappreciated predictor of outcomes in lifestyle modification programs for adults with obesity. Purpose This study tested the hypotheses that higher levels of baseline executive functioning would predict greater weight loss and physical activity after 6 months of behavioral treatment. Methods Participants (N = 320) were recruited from the community and provided with 16 treatment sessions. Executive functioning was measured with the tower task component of the Delis-Kaplan Executive Function System (D-KEFS). At months 0 and 6, weight was measured in the clinic and physical activity was measured with tri-axial accelerometers. Results Baseline D-KEFS achievement score, rule violations, and completion time significantly predicted weight loss at 6 months. For example, among participants without any rule violations (n = 162), weight loss averaged 11.0%, while those with rule violations (n = 158) averaged 8.7% weight loss. Rule violations also significantly predicted physical activity at 6 months. Among participants without any rule violations, physical activity at 6 months averaged 169.8 min/week, versus 127.2 min/week among those with rule violations. Conclusions Particular aspects of executive functioning may predict the relative ease or difficulty of changing eating and exercise-related behaviors, albeit with small effect sizes. This study is the first to our knowledge to detect a predictive relationship between components of executive functioning and objectively measured physical activity in adult lifestyle modification, and one of the first to predict weight loss in adults using an objective measure of executive functioning. ClinicalTrials.gov registration number NCT02363010

scholarly journals The Association Between Objectively Measured Physical Activity and Academic Achievement in Dutch Adolescents: Findings From the GOALS Study

2014 ◽  
Vol 36 (5) ◽  
pp. 460-473 ◽  
Author(s):  
Martin L. Van Dijk ◽  
Renate H.M. De Groot ◽  
Hans H.C.M. Savelberg ◽  
Frederik Van Acker ◽  
Paul A. Kirschner
Keyword(s):  
Physical Activity ◽  
Academic Achievement ◽  
Executive Functioning ◽  
Vigorous Physical Activity ◽  
Mathematics Performance ◽  
Negatively Associated ◽  
Physical Activity Volume ◽  
And Mathematics ◽  
Objectively Measured ◽  
Objectively Measured Physical Activity

The main goal of this study was to investigate the association between objectively measured physical activity and academic achievement in adolescents. Students in Grades 7 and 9 (N = 255) were included. Overall, we found no significant dose–response association between physical activity and academic achievement. However, in Grade 7 total physical activity volume (Total PA) was negatively associated with academic achievement, while moderate-to-vigorous physical activity (MVPA) was negatively associated with both academic achievement and mathematics performance. In contrast, in Grade 9 both Total PA and MVPA were positively associated with mathematics performance. In addition, the overall association between MVPA and academic achievement followed an inverted U-shaped curve. Finally, Total PA was positively associated with executive functioning, while executive functioning in turn mediated the associations between Total PA and both academic achievement and mathematics performance. These results indicate that the association between physical activity and academic achievement in adolescents is complex and might be affected by academic year, physical activity volume and intensity, and school grade.

scholarly journals Group-Based Trajectory Analysis of Physical Activity Change in a US Weight Loss Intervention

2018 ◽  
Vol 15 (11) ◽  
pp. 840-846 ◽  
Author(s):  
Christopher C. Imes ◽  
Yaguang Zheng ◽  
Dara D. Mendez ◽  
Bonny J. Rockette-Wagner ◽  
Meghan K. Mattos ◽  
...  
Keyword(s):  
Physical Activity ◽  
Body Mass Index ◽  
Weight Loss ◽  
Body Mass ◽  
Behavioral Treatment ◽  
Group Membership ◽  
Multinomial Logistic Regression ◽  
Step Count ◽  
Weight Loss Intervention ◽  
Trajectory Group

Background: The obesity epidemic is a global concern. Standard behavioral treatment including increased physical activity, reduced energy intake, and behavioral change counseling is an effective lifestyle intervention for weight loss. Purpose: To identify distinct step count patterns among weight loss intervention participants, examine weight loss differences by trajectory group, and examine baseline factors associated with trajectory group membership. Methods: Both groups received group-based standard behavioral treatment while the experimental group received up to 30 additional, one-on-one self-efficacy enhancement sessions. Data were analyzed using group-based trajectory modeling, analysis of variance, chi-square tests, and multinomial logistic regression. Results: Participants (N = 120) were mostly female (81.8%) and white (73.6%) with a mean (SD) body mass index of 33.2 (3.8) kg/m2. Four step count trajectory groups were identified: active (>10,000 steps/day; 11.7%), somewhat active (7500–10,000 steps/day; 28.3%), low active (5000–7500 steps/day; 27.5%), and sedentary (<5000 steps/day; 32.5%). Percent weight loss at 12 months increased incrementally by trajectory group (5.1% [5.7%], 7.8% [6.9%], 8.0% [7.4%], and 13.63% [7.0%], respectively; P = .001). At baseline, lower body mass index and higher perceived health predicted membership in the better performing trajectory groups. Conclusions: Within a larger group of adults in a weight loss intervention, 4 distinct trajectory groups were identified and group membership was associated with differential weight loss.

scholarly journals A pilot study of acceptance-based behavioural weight loss for adolescents with obesity

2019 ◽  
Vol 47 (6) ◽  
pp. 686-696 ◽  
Author(s):  
Jena Shaw Tronieri ◽  
Thomas A. Wadden ◽  
Sharon M. Leonard ◽  
Robert I. Berkowitz
Keyword(s):  
Physical Activity ◽  
Weight Loss ◽  
Pilot Study ◽  
Lifestyle Modification ◽  
Psychological Treatment ◽  
Psychosocial Outcomes ◽  
Cognitive Restraint ◽  
Acceptance And Commitment ◽  
Medium Increase

AbstractBackground:Acceptance and commitment therapy (ACT) is a psychological treatment that has been found to increase weight loss in adults when combined with lifestyle modification, compared with the latter treatment alone. However, an ACT-based treatment for weight loss has never been tested in adolescents.Methods:The present pilot study assessed the feasibility and acceptability of a 16-week, group ACT-based lifestyle modification treatment for adolescents and their parents/guardians. The co-primary outcomes were: (1) mean acceptability scores from up to 8 biweekly ratings; and (2) the percentage reduction in body mass index (BMI) from baseline to week 16. The effect size for changes in cardiometabolic and psychosocial outcomes from baseline to week 16 also was examined.Results:Seven families enrolled and six completed treatment (14.3% attrition). The mean acceptability score was 8.8 for adolescents and 9.0 for parents (on a 1–10 scale), indicating high acceptability. The six adolescents who completed treatment experienced a 1.3% reduction in BMI (SD = 2.3, d = 0.54). They reported a medium increase in cognitive restraint, a small reduction in hunger, and a small increase in physical activity. They experienced small improvements in most quality of life domains and a large reduction in depression.Conclusions:These preliminary findings indicate that ACT plus lifestyle modification was a highly acceptable treatment that improved weight, cognitive restraint, hunger, physical activity, and psychosocial outcomes in adolescents with obesity.

scholarly journals Physical discomfort intolerance as a predictor of weight loss and physical activity in a lifestyle modification program

2020 ◽  
Vol 43 (6) ◽  
pp. 1041-1046
Author(s):  
Mary K. Martinelli ◽  
Kathryn M. Godfrey ◽  
Monica Martinez ◽  
Evan M. Forman ◽  
Meghan L. Butryn
Keyword(s):  
Physical Activity ◽  
Weight Loss ◽  
Lifestyle Modification ◽  
Physical Discomfort ◽  
Discomfort Intolerance ◽  
Lifestyle Modification Program

scholarly journals Changes in Theory-Based Psychological Factors Predict Weight Loss in Women with Class III Obesity Initiating Supported Exercise

2010 ◽  
Vol 2010 ◽  
pp. 1-4 ◽  
Author(s):  
James J. Annesi ◽  
Srinivasa Gorjala
Keyword(s):  
Weight Loss ◽  
Psychological Factors ◽  
Behavioral Treatment ◽  
Severe Obesity ◽  
Exercise Program ◽  
Behavioral Model ◽  
Exercise Session ◽  
Class Iii ◽  
Predict Weight Loss ◽  
Severely Obese

Background. Psychological factors' effect on weight loss is poorly understood, in general, and specifically in the severely obese.Objective. To examine whether a behavioral model based on tenets of social cognitive and self-efficacy theory will increase understanding of the relationship between exercise and weight loss.Methods. Fifty-one women with severe obesity participated in a 24-week exercise and nutrition information treatment and were measured on changes in psychological factors and exercise attendance.Results. A significant portion of the variance in BMI change (adjusted for number of predictors) was accounted for by the behavioral model . Entry of exercise session attendance only marginally improved the prediction to 0.27. Only 19% of the weight lost was directly attributable to caloric expenditure from exercise.Conclusions. Findings suggest that participation in an exercise program affects weight loss through psychological pathways and, thus, may be important in the behavioral treatment of severe obesity.

scholarly journals Changes Induced by Physical Activity and Weight Loss in the Morphology of Intermyofibrillar Mitochondria in Obese Men and Women

2006 ◽  
Vol 91 (8) ◽  
pp. 3224-3227 ◽  
Author(s):  
Frederico G. S. Toledo ◽  
Simon Watkins ◽  
David E. Kelley
Keyword(s):  
Physical Activity ◽  
Insulin Resistance ◽  
Skeletal Muscle ◽  
Weight Loss ◽  
Insulin Sensitivity ◽  
Lifestyle Modification ◽  
Vastus Lateralis ◽  
Vastus Lateralis Muscle ◽  
Mitochondrial Content ◽  
The Mean

Abstract Context: In obesity, skeletal muscle insulin resistance may be associated with smaller mitochondria. Objective: Our objective was to examine the effect of a lifestyle-modification intervention on the content and morphology of skeletal muscle mitochondria and its relationship to insulin sensitivity in obese, insulin-resistant subjects. Design: In this prospective interventional study, intermyofibrillar mitochondrial content and size were quantified by transmission electron microscopy with quantitative morphometric analysis of biopsy samples from vastus lateralis muscle. Systemic insulin sensitivity was measured with euglycemic hyperinsulinemic clamps. Setting: The study took place at a university-based clinical research center. Participants: Eleven sedentary, overweight/obese volunteers without diabetes participated in the study. Intervention: Intervention included 16 wk of aerobic training with dietary restriction of 500-1000 kcal/d. Main Outcome Measures: We assessed changes in mitochondrial content and size and changes in insulin sensitivity. Results: The percentage of myofiber volume occupied by mitochondria significantly increased from 3.70 ± 0.31 to 4.87 ± 0.33% after intervention (P = 0.01). The mean individual increase was 42.5 ± 18.1%. There was also a change in the mean cross-sectional mitochondrial area, increasing from a baseline of 0.078 ± 0.007 to 0.091 ± 0.007 μm2 (P &lt; 0.01), a mean increase of 19.2 ± 6.1% per subject. These changes in mitochondrial size and content highly correlated with improvements in insulin resistance (r = 0.68 and 0.72, respectively; P = 0.01). Conclusions: A combined intervention of weight loss and physical activity in previously sedentary obese adults is associated with enlargement of mitochondria and an increase in the mitochondrial content in skeletal muscle. These findings indicate that in obesity with insulin resistance, ultrastructural mitochondrial plasticity is substantially retained and, importantly, that changes in the morphology of mitochondria are associated with improvements in insulin resistance.

scholarly journals Objectively-measured physical activity patterns and longitudinal weight category status in a rural setting

2019 ◽  
Author(s):  
Ian Cook
Keyword(s):  
Physical Activity ◽  
Weight Loss ◽  
Weight Gain ◽  
Energy Expenditure ◽  
Body Mass ◽  
Weight Change ◽  
Rural Setting ◽  
Stable Group ◽  
Objectively Measured ◽  
Objectively Measured Physical Activity

Abstract Objectives To investigate the relationship between longitudinal weight-change and objectively-measured physical activity in a rural African setting in 143 adults, using data from two cross-sectional surveys, separated by approximately ten years. Participants who had data for age, sex, body mass and stature measured in two health surveys were categorised into three weight-change groups (Weight-loss: ≥25 kg.m-2→<25 kg.m-2; Weight-gain: <25 kg.m-2→≥25 kg.m-2; Weight-stability: remained <25 kg.m-2 or ≥25 kg.m-2). Daily ambulation and energy expenditure, measured in the 2005-7 health survey, was examined across the weight change groups. Using the daily energy expenditure data, the proportion of those in the weight-change groups, meeting or not meeting two physical activity guidelines (150- and 420 min.wk-1), was examined. Results Weight-change was found in 18.2% of the sample. There was no significant overall body mass change (+1.2 kg, p=0.1616). However, there was significant change in body mass in the weight-gain (+15.2 kg) and weight-loss (-10.8 kg) groups (p≤0.0011). Nearly 90% of those who gained weight met the 150 min.wk-1 guideline. A significantly greater proportion of the weight-stable group (<25 kg.m-2) met the 420 min.wk-1 guideline (p<0.05). Ambulatory level was high irrespective of weight group, although the weight-stable group (<25 kg.m-2) approached 15 000 steps.day-1.

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