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Physical activity

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Physical Activity Levels In First-Year University Students, Jerealya Cogdell May 2024

Physical Activity Levels In First-Year University Students, Jerealya Cogdell

Honors College Theses

The purpose of this study is to see if physical activity (PA) is affected for students since transitioning from high school to their first semester in college. The study was conducted by asking questions pertaining to PA via an online survey through the platform Qualtrics. It will be administered to students at Georgia Southern University. However, only the data from freshmen students that meet specific criteria will be accounted for in this study. The data will be analyzed using Chi-squared to determine how PA is affected due to this transition. The data will compare the results from high school senior …


Exploring The Associations Between Sexism, Physical Behaviors, And Psychosocial Correlates Of Physical Activity In Young Women, Melanna Cox Nov 2023

Exploring The Associations Between Sexism, Physical Behaviors, And Psychosocial Correlates Of Physical Activity In Young Women, Melanna Cox

Doctoral Dissertations

Physical behaviors (PB), defined as physical activity (PA) and sedentary behavior (SB), tend to be less favorable in women than in men. Low self-efficacy (SE) and social support (SS), and gender norms hinder women’s PB. Benevolent sexism, a theory on gender norms, could explain the gender disparity. PURPOSE: To 1) assess the associations among benevolent sexism endorsement (BSEN), experiences with benevolent sexism (EBS), PB, SE, and SS, 2) evaluate if BSEN or SE mediate the relationship between EBS and PB, and 3) develop a questionnaire that measures a woman’s sexist experiences in PA. METHODS: Study 1: Women (N=186) completed a …


Comparison Of Physical Activity Levels Among School-Age Adolescents In The Rural And Urban Areas Of District Swat Kpk, Pakistan- An Analytical Cross-Sectional Study, Imran Uddin Nov 2023

Comparison Of Physical Activity Levels Among School-Age Adolescents In The Rural And Urban Areas Of District Swat Kpk, Pakistan- An Analytical Cross-Sectional Study, Imran Uddin

Theses & Dissertations

Background: Obesity and overweight represent significant global public health concerns. Young adolescents are in particular increasingly experiencing obesity and overweight due to their sedentary lifestyles, excessive electronic media use, and lack of physical activity (PA). This trend is linked to the development of non-communicable diseases in later life. Moreover, data regarding the lack of PA is available in Pakistan, but a gap exists in the comparative analysis of physical activity levels between rural and urban adolescents. Rural and urban areas exhibit distinctions in both geographical settings and technological advancements, potentially influencing the PA levels of their respective inhabitants.
Purpose: The …


A Reflection Of Experiences Of Adults With Type 1 Diabetes In Integrated Physical Education Classes, Kalleigh West Oct 2023

A Reflection Of Experiences Of Adults With Type 1 Diabetes In Integrated Physical Education Classes, Kalleigh West

Human Movement Sciences Theses & Dissertations

The purpose of this study was to gain an understanding of the experiences of type 1 diabetics in integrated physical education classes. In this study, we interviewed young type 1 diabetic adults and asked them to reflect on their school-based physical education experiences. An interpretative phenomenological analysis (IPA) approach was adopted to guide data collection, analysis, and interpretation for this retrospective study. Eight participants (ages 19 to 32) were enrolled in this study, and semi-structured interviews focused on their physical education experiences acted as the primary data. Transcribed interview data were analyzed using an IPA approach. Three interrelated themes emerged …


The Effect Of Long Covid Syndrome On Physical Activity, Patrisha Hanna Villarmea Sep 2023

The Effect Of Long Covid Syndrome On Physical Activity, Patrisha Hanna Villarmea

Master of Science in Kinesiology

Long covid syndrome is a condition where individuals experience persistent symptoms and functional limitations that can last about three months to two years after the initial Covid-19 infection. While long-term health consequences of Covid-19 have garnered significant attention,the impact of long covid syndrome symptoms is poorly understood. The purpose of the study is to explore the effect of long covid syndrome symptoms to an individual’s physical activity. Furthermore, this research aims to provide an overview of the existing literature on the effect of long covid syndrome symptoms on physical activity. The research would invite participants to answer two surveys that …


Social And Cultural Processes That Impact Physical Activity Among South Asian Americans Managing Hypertension: A Mixed Methods Study, Sugandha Gupta Sep 2023

Social And Cultural Processes That Impact Physical Activity Among South Asian Americans Managing Hypertension: A Mixed Methods Study, Sugandha Gupta

Dissertations, Theses, and Capstone Projects

Cardiovascular disease (CVD), the number one cause of death in the U.S., disproportionately affects South Asian Americans (SAAs). Physical activity is a modifiable health behavior that can reduce cardiovascular risk. Health behaviors, such as physical activity, occur within specific social and cultural contexts and are influenced by multiple factors at multiple levels of the social ecological model. This dissertation aimed to provide a rich, culturally-informed understanding of the factors at multiple levels – individual, interpersonal, and cultural –associated with physical activity among SAAs at risk for CVD. A sequential exploratory mixed methods approach was employed to examine social and cultural …


Tailoring Digital Physical Activity Support Messages For Women In Midlife With Elevated Risk For Cardiovascular Disease: A Multicomponent Study, Kiri Baga Aug 2023

Tailoring Digital Physical Activity Support Messages For Women In Midlife With Elevated Risk For Cardiovascular Disease: A Multicomponent Study, Kiri Baga

Theses and Dissertations

Women in midlife (ages 40-60) are at heightened risk for cardiovascular disease (CVD). Although physical activity (PA) engagement can reduce CVD risk, few women engage in sufficient PA to receive this benefit. They cite lack of social support as a key barrier, but existing interventions that employ social support show limited effectiveness. Digital PA support messages (i.e., brief, text-based messages delivered via smartphone or other device) may be a powerful method to meet social support needs in daily life. However, women’s preferences for and responses to distinct types of messages are not well understood. The aim of this study was …


Sexual Orientation Differences In The Association Between Physical Activity And Allostatic Load: Results From The National Health And Nutrition Examination Study, Natalia I. Putnam Aug 2023

Sexual Orientation Differences In The Association Between Physical Activity And Allostatic Load: Results From The National Health And Nutrition Examination Study, Natalia I. Putnam

Masters Theses

Higher levels of allostatic load (AL), a composite measure of the impact of chronic stress on the body, are found among socially marginalized groups compared to privileged groups. AL is associated with premature aging and death, as well as a variety of chronic health conditions that impact quality of life. Effects of AL may be offset by physical activity (PA). Queer populations (including those who identify as lesbian, gay, or bisexual) may be at risk for elevated AL due to repeated exposure to discrimination in the form of sexual minority stress. There is mixed literature on sexual orientation differences in …


Effectiveness Of Intervention Studies Based On Diet And/Or Physical Activity In Treatment, Prevention, And Management Of Diabetes Among South Asians: A Systematic Review, Ishaan Arora Aug 2023

Effectiveness Of Intervention Studies Based On Diet And/Or Physical Activity In Treatment, Prevention, And Management Of Diabetes Among South Asians: A Systematic Review, Ishaan Arora

Theses and Dissertations

The purpose of this study was to describe diet and/or physical activity-based interventions and their control in cardiometabolic risk factors of diabetes for the South Asian (SA) population. A systematic review was conducted in accordance with the PRISMA guidelines. Seventeen randomized control trials meeting the inclusion criteria were included for analysis. Interventions with type-2 diabetic SA showed significant improvements in HbA1c% (4/5 studies), fasting blood glucose (3/4 studies), and postprandial glucose (2/2 studies). Interventions with at-risk/prediabetic and non-diabetic SA showed a modest change in overall outcomes, with significant change reported for post-prandial insulin (3/4 studies), BMI and weight (2/4 studies), …


Initiating A Childhood Obesity Screening Process In An Urban Pediatric Office, Kesha Thomas Jul 2023

Initiating A Childhood Obesity Screening Process In An Urban Pediatric Office, Kesha Thomas

Doctor of Nursing Practice Projects

Background: The benefit of identifying a pediatric patient with obesity is to prevent many chronic health conditions that can occur from diabetes. Pediatric patients can be at risk for prediabetes, low self-esteem, and musculoskeletal issues. The patients that are at higher risk for childhood obesity are African American and Hispanics.

Purpose: The Doctor of Nursing Practice project aims to identify a pediatric patient that is obese to make sure that the patient is assessed appropriately and to discuss an appropriate intervention for the patient. To make sure all pediatrics have an accurate height, weight, and A1C during their well-child visit. …


Exercise As A Prescription For Patients With Depressive Disorders: A Quality Improvement Project, Sydney Roscoe, Rachelle Pace May 2023

Exercise As A Prescription For Patients With Depressive Disorders: A Quality Improvement Project, Sydney Roscoe, Rachelle Pace

Doctor of Nursing Practice Final Manuscripts

Purpose: The aim of this Doctor of Nursing Practice project was to increase exercise counseling rates in the treatment of depression by (1) implementing a focused educational training program and (2) understanding factors that impacted utilization of the practice change.

Background: Approximately 280 million individuals suffer globally from depressive disorders. Depression remains the fourth leading cause of disabilities, significantly contributing toward the global burden of disease by increasing morbidity and mortality risk. Psychopharmacology and psychotherapy are current gold standards of treatment; however, providers often overlook the significant role exercise serves in reducing depressive symptoms and severity, as it remains underutilized. …


A Prescription For Exercise In Adolescents: A Pilot Project, Alexa Sikalis May 2023

A Prescription For Exercise In Adolescents: A Pilot Project, Alexa Sikalis

Doctor of Nursing Practice Final Manuscripts

Purpose: The purpose of this evidence based practice project was to increase physical activity (PA) times in pediatric patients who were not meeting the recommended guidelines of 60 minutes per day of activity. The goal was to educate adolescents on the benefits of exercise in order to increase their overall PA, even if it did not meet the recommended 60 minutes per day. The implemented education was also intended to motivate patients to establish healthy habits and minimize risks of poor health outcomes.

Background: Adolescence is characterized by development of neuronal plasticity and establishment of behavioral patterns. PA …


A Lifestyle Modification Intervention In Hispanic Adolescents With Nonalcoholic Fatty Liver Disease, Brianne Miller May 2023

A Lifestyle Modification Intervention In Hispanic Adolescents With Nonalcoholic Fatty Liver Disease, Brianne Miller

Evidence-Based Practice Project Reports

U.S. population studies have confirmed that the Hispanic population has the highest prevalence and the worst prognosis for non-alcoholic fatty liver disease (NAFLD) (Katz et al., 2021). The purpose of this evidence-based practice project was to implement a multicomponent, lifestyle modification intervention in Hispanic pediatric primary care patients to combat the disease process and sequela of NAFLD. The PICOT question for this project was: In Hispanic adolescents aged 10-21 with obesity and NAFLD (P), what is the effect of a multicomponent, lifestyle modification intervention (I), on alanine aminotransferase (ALT) (O), over a 12-week time period (T)? A comprehensive literature search …


The Impact Of Sleep Quality Combined With Physical Activity On Autonomic Function (24-Hour Hrv) In College Students, Meghan Peterson, Trent Hargens, Elizabeth Edwards, Christopher Womack May 2023

The Impact Of Sleep Quality Combined With Physical Activity On Autonomic Function (24-Hour Hrv) In College Students, Meghan Peterson, Trent Hargens, Elizabeth Edwards, Christopher Womack

Masters Theses, 2020-current

Long-term poor sleep quality is associated with health outcomes that can lead to autonomic nervous system dysfunction. Both cardiorespiratory fitness and physical activity (PA) are associated with improvements in autonomic function and heart rate variability (HRV). Markers of fitness and sleep were explored to determine the degree of contribution to autonomic dysfunction. A total of 15 subjects, (age = 20.6±0.5; BMI = 23.9±1.0) completed 7 days of physical activity and sleep assessment via accelerometry. Participants then completed a graded exercise test to determine cardiorespiratory fitness (VO2max), followed by a 24-H HRV measurement. HRV through LF:HF ratio was negatively …


Socioeconomic Patterning Of Physical Activity Among Middle-Aged To Older Adults, Jane Yuan Feb 2023

Socioeconomic Patterning Of Physical Activity Among Middle-Aged To Older Adults, Jane Yuan

Electronic Thesis and Dissertation Repository

Regular physical activity is a well-known protective factor against chronic disease and strongly correlated with healthy aging. However, as physical activity levels tend to decline with age, there is a need to identify barriers which prevent older adults from being physically active. This thesis investigated the relationship between socioeconomic status and meeting physical activity guidelines of 150 minutes or more of moderate- to vigorous- intensity physical activity among middle-aged to older adults in Canada. Using cross-sectional data from the baseline assessment of the Canadian Longitudinal Study on Aging, block-wise multivariable logistic regression was performed to assess the association between socioeconomic …


Mental Health And Physical Activity Motivation During Covid-19, Cian Foley Feb 2023

Mental Health And Physical Activity Motivation During Covid-19, Cian Foley

Honors Program Theses and Research Projects

The COVID-19 pandemic resulted in worldwide lockdown measures which saw individuals confined to their homes and isolated from one another. This isolation led to reduced opportunities to engage in physical activity. The aim of this study was to investigate the impact that the COVID-19 pandemic had on individuals’ motivation to be physically active. Subsequently the impact of COVID-19 on various motivation types was investigated. Individuals
who reported higher levels of autonomous physical activity motivation did not report greater satisfaction with mental health than participants with less autonomous motivation. However, 90.9% of individuals who reported less autonomous motivation reported that they …


Sit Less, Move More: A National Study Of Physical-Activity Behavior And Cancer, Stella O. Nwogugu Feb 2023

Sit Less, Move More: A National Study Of Physical-Activity Behavior And Cancer, Stella O. Nwogugu

Dissertations, Theses, and Capstone Projects

Background: Physical activity is associated with lower risks of cancer, the second leading cause of death among Americans. Yet, sedentary behavior is the prevailing lifestyle for about 80% of American adults. Additionally, cancer survivors remain significantly inactive, even though physical activity has been shown to decrease risk of cancer and cancer recurrence, improve tolerance of cancer therapy, and reduce mortality. This research explores the relative impact of personal agency, social support, and key demographic variables on physical-activity behavior for a national sample of adults as well as how these relationships differ for cancer survivors and their counterparts.

Methods: Using the …


Combating The Sedentary Lifestyle In A Rural North Carolina Community, Kelsey Toliver Watts Jan 2023

Combating The Sedentary Lifestyle In A Rural North Carolina Community, Kelsey Toliver Watts

Doctor of Nursing Practice Projects

A rural North Carolina community is experiencing an increase in inactivity, obesity, and comorbidities. The project leader collaborated with the local health department and recreation department to implement community walking events. The events aimed to promote physical activity while providing education to the residents as to why physical activity is important. The project leader used optional pre-walking event and post-walking event surveys to assess activity change and increased knowledge. Out of the 90 attendees, 68% completed the pre-event survey and 14% responded to the post-event survey. This created limited data available for follow-up. All participants who completed the follow-up plan …


Effects Of Physical Activity, Play And Mindfulness-Based Interventions On Emotional Regulation And Emotional Awareness Skills In Adults With Developmental Disabilities At A Day-Time Assistance Program, Aaron Arndt Jan 2023

Effects Of Physical Activity, Play And Mindfulness-Based Interventions On Emotional Regulation And Emotional Awareness Skills In Adults With Developmental Disabilities At A Day-Time Assistance Program, Aaron Arndt

OT Student Capstones

Background: According to literature, deficiencies in emotional regulation and emotional awareness skills are more prevalent among adults diagnosed with developmental disabilities. Limited research shows promising support that the use of noninvasive treatments such as exercise, and play can promote emotional well-being among this population. This project aims to better understand the benefits of physical activity, play, and mindfulness-based interventions on emotional regulation skills in adults with developmental disabilities who attend a day-time assistance program.

Method: This 14-week capstone project was conducted at Lauren’s Institute for Education’s Adult Day Treatment (DTA) program. The occupational therapy doctorate (OTD) student developed and implemented …


Increasing The Duration Of Treadmill Walking To Reach Moderate Intensity Levels For 2 Students With Autism Spectrum Disorder (Asd), Nicholas Velazquez Jan 2023

Increasing The Duration Of Treadmill Walking To Reach Moderate Intensity Levels For 2 Students With Autism Spectrum Disorder (Asd), Nicholas Velazquez

Cal Poly Humboldt theses and projects

This study aims to increase the duration of treadmill walking to reach moderate intensity levels for 2 students with autism spectrum disorder (ASD). The researcher incorporated a token-economy board that was used to indicate total time walking and walking goals. A single case changing-criterion design was used in this study and consisted of a baseline, multiple sub-criteria intervention phase, and a follow-up phase. Results showed that there was a positive relationship between the intervention and the total walking time for each participant. Each participant met the criterion for each phase, eventually leading to meeting their overall goal for the study. …


Evaluation Of Sleep Benefits Following A 16-Week Judo Program For Children With Autism Spectrum Disorder, Neha R. Chittaluru Jan 2023

Evaluation Of Sleep Benefits Following A 16-Week Judo Program For Children With Autism Spectrum Disorder, Neha R. Chittaluru

Honors Undergraduate Theses

Autism Spectrum Disorder is a neurodevelopmental disorder characterized by language and communication deficits, and difficulties with social interaction (Twisk, 2001). Research has shown that 80% of youth with ASD experience sleep challenges which can lead to sleep-related health issues, exacerbate problematic behaviors, and increase vulnerability to anxiety and depression (Wachob & Lorenzi, 2015; Williams et al., 2004; Richdale & Schreck, 2009). Sleep plays a central role in adaptive functioning, and insufficient sleep can hinder learning, memory, and neuroplasticity for children with ASD (Cohen et al., 2014). As these unhealthy behavior patterns can lead to more adverse long-term health consequences, it …


Observing The Relationship Between Physical Activity, Overall Health, Anxiety, And Sleep, Brianna Chicas Jan 2023

Observing The Relationship Between Physical Activity, Overall Health, Anxiety, And Sleep, Brianna Chicas

Honors Undergraduate Theses

College students' mental health has been researched for some time. In particular, the correlation between physical activity and mental health symptoms has been researched. The study examines the relationship between physical activity and anxiety, sleep, and overall health. College undergraduate students at the University of Central Florida took an online survey that measured all of these variables. A Pearson's correlation coefficient was used to assess correlations. Positive correlations were found between anxiety and sleep, anxiety and social desirability, sleep and social desirability, and strength training and vigorous physical activity. Negative correlations were found between overall health and physical activity, overall …


Physical Activity And Exercise With Blood Flow Restriction As Medicine During The Covid-19 Pandemic And Beyond, Isaac J. Wedig Jan 2023

Physical Activity And Exercise With Blood Flow Restriction As Medicine During The Covid-19 Pandemic And Beyond, Isaac J. Wedig

Dissertations, Master's Theses and Master's Reports

During the COVID-19 pandemic, physical activity levels have decreased and sitting time has increased. This is a major concern as physical inactivity increases the risk for severe COVID-19 outcomes. Evidence also indicates that COVID-19 survivors can experience reduced physical function (i.e., ability to complete daily living activities) long after acute illness. Currently, there are no evidence-based guidelines for recovering physical function following COVID-19 infection. Exercise with blood flow restriction (BFR) presents a promising rehabilitation strategy as the benefits of traditional exercise can be achieved using lower intensities. However, several barriers such as cost, access to equipment, and lack of standardized …


The Lived Experience Of Lung Cancer Patients With Psychological Health And Physical Activity, Donna Leeann Homkes Jan 2023

The Lived Experience Of Lung Cancer Patients With Psychological Health And Physical Activity, Donna Leeann Homkes

Walden Dissertations and Doctoral Studies

AbstractPhysical activity (PA) is recognized as a treatment protocol for lung cancer patients that improves physical impairments and reduces symptoms of psychological stress. This qualitative interpretive phenomenological analysis (IPA) study was conducted to explore the lived experience of lung cancer patients and how PA is influenced by anxiety, depression, and fatigue. This study was guided by Bandura’s self-efficacy theory and Engel’s biopsychosocial model. In-depth semi structured interviews were conducted with seven lung cancer participants over Zoom and in person. The data were analyzed using manual hand coding. The analysis revealed themes in patients’ experiences about how PA participation is influenced …


Relationship Between Screentime And Depressive Symptoms And Associated Mediators For African American Adolescents In The United States, Brittney Jones Jan 2023

Relationship Between Screentime And Depressive Symptoms And Associated Mediators For African American Adolescents In The United States, Brittney Jones

Walden Dissertations and Doctoral Studies

The prevalence of adolescent depression in the United States is increasing as adolescents’ use of electronic screen devices increases. Some studies have found associations between screentime and adolescent depression, and other researchers have posited that screentime is not intrinsically harmful. High screentime in African American adolescents may place them at risk for worse depressive symptom outcomes, but the relationship between screentime and depressive symptoms for this population is unknown. The three research questions of this study addressed whether there is a relationship between screentime and depressive symptoms in African American adolescents, and whether sleep duration and the frequency of physical …


Relationship Between Screentime And Depressive Symptoms And Associated Mediators For African American Adolescents In The United States, Brittney Jones Jan 2023

Relationship Between Screentime And Depressive Symptoms And Associated Mediators For African American Adolescents In The United States, Brittney Jones

Walden Dissertations and Doctoral Studies

The prevalence of adolescent depression in the United States is increasing as adolescents’ use of electronic screen devices increases. Some studies have found associations between screentime and adolescent depression, and other researchers have posited that screentime is not intrinsically harmful. High screentime in African American adolescents may place them at risk for worse depressive symptom outcomes, but the relationship between screentime and depressive symptoms for this population is unknown. The three research questions of this study addressed whether there is a relationship between screentime and depressive symptoms in African American adolescents, and whether sleep duration and the frequency of physical …


The Lived Experience Of Lung Cancer Patients With Psychological Health And Physical Activity, Donna Leeann Homkes Jan 2023

The Lived Experience Of Lung Cancer Patients With Psychological Health And Physical Activity, Donna Leeann Homkes

Walden Dissertations and Doctoral Studies

AbstractPhysical activity (PA) is recognized as a treatment protocol for lung cancer patients that improves physical impairments and reduces symptoms of psychological stress. This qualitative interpretive phenomenological analysis (IPA) study was conducted to explore the lived experience of lung cancer patients and how PA is influenced by anxiety, depression, and fatigue. This study was guided by Bandura’s self-efficacy theory and Engel’s biopsychosocial model. In-depth semi structured interviews were conducted with seven lung cancer participants over Zoom and in person. The data were analyzed using manual hand coding. The analysis revealed themes in patients’ experiences about how PA participation is influenced …


The Relationship Between Attributes Of Mhealth App Acceptability And The Likelihood Of Mhealth App Adoption In The 18–19-Year-Old College Freshman, Celeste Rochelle Jan 2023

The Relationship Between Attributes Of Mhealth App Acceptability And The Likelihood Of Mhealth App Adoption In The 18–19-Year-Old College Freshman, Celeste Rochelle

Graduate Research Theses & Dissertations

Achieving the recommended amount of physical activity (PA) is linked to improved cognitive function, overall physical health, and protection against non-communicable diseases. However, most people surveyed in the United States do not meet the recommendations for PA; especially adolescents between the ages of 17-19. Evidence suggests that interventions for increasing PA must be considered acceptable before the individual will use them. This study explored the relationships between the attributes of acceptability of mHealth apps and adoption intention of mHealth apps in a sample of adolescents (n = 287). Participants completed a survey with 24 total items: 19 from the Acceptability …


Factors Associated With Physical Activity Intent Among Adults With Multiple Sclerosis, Biebele Okpeahior Jan 2023

Factors Associated With Physical Activity Intent Among Adults With Multiple Sclerosis, Biebele Okpeahior

Electronic Theses and Dissertations

Introduction. Although research has highlighted the benefits of physical activity in people with Multiple Sclerosis (MS), they are still more likely to live an inactive lifestyle. There are limited studies that examine the relationship between physical activity and the Theory of Planned Behavior (TPB) among the MS population. This study aimed to explore the factors that associate with physical activity intent of adults with MS utilizing the constructs of the TPB. Methods. This study utilized a cross-sectional online survey done via a social media platform. There were 326 respondents to the survey and ultimately 249 surveys that met the criteria …


Exploration Of The Effects Of Developmental Coordination Disorder On Skeletal Development From Childhood Through To Early Adulthood, Jocelyn Tan Jan 2023

Exploration Of The Effects Of Developmental Coordination Disorder On Skeletal Development From Childhood Through To Early Adulthood, Jocelyn Tan

Theses

This thesis examined bone development from childhood into early adulthood in individuals with developmental coordination disorder (DCD) using a life course health development framework. One systematic review was conducted, and four original research studies produced with retrospective data from four unique cohorts in childhood, adolescence, and adulthood. Physical activity was assessed via accelerometry in Finnish child and adult populations and via self-reporting in an Australian population at 17 and 20 years. Bone was assessed via peripheral quantitative computed tomography in adolescents and dual energy x-ray absorptiometry in adults at age 20 years in two Australian cohorts. Bone was assessed cross-sectionally …