Full Text Journal Articles by
Author Timothy S Church

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Effect of Aerobic Exercise-induced Weight Loss on the Components of Daily Energy Expenditure.

Nicholas T Broskey, Corby K Martin, Jeffrey H Burton, Timothy S Church, Eric Ravussin, Leanne M Redman,

<h4>Introduction</h4>Exercise usually results in less weight loss than expected. This suggests increased energy intake and/or deceased expenditure counteract the energy deficit induced by exercise. The aim of this study was to evaluate changes in components of daily energy expenditure (doubly labeled water and room calorimetry) after 24 wk of exercise ... Read more >>

Med Sci Sports Exerc (Medicine and science in sports and exercise)
[2021, 53(10):2164-2172]

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Impact of a Novel Training Approach on Hemodynamic and Vascular Profiles in Older Adults.

Mary N Woessner, Michael A Welsch, Mitch D VanBruggen, Neil M Johannsen, Daniel P Credeur, Carl F Pieper, Richard Sloane, Conrad P Earnest, Joaquin Ortiz De Zevallos Munoz, Timothy S Church, Eric Ravussin, William E Kraus, Jason D Allen,

Exercise training beneficially moderates the effects of vascular aging. This study compared the efficacy of Peripheral Remodeling through Intermittent Muscular Exercise (PRIME), a novel training regimen, versus aerobic training on hemodynamic profiles in participants ≥70 years at risk for losing functional independence. Seventy-five participants (52 females, age: 76 ± 5 years) were ... Read more >>

J Aging Phys Act (Journal of aging and physical activity)
[2021, :1-8]

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Exploring Differences in Cardiorespiratory Fitness Response Rates Across Varying Doses of Exercise Training: A Retrospective Analysis of Eight Randomized Controlled Trials.

Jacob T Bonafiglia, Nicholas Preobrazenski, Hashim Islam, Jeremy J Walsh, Robert Ross, Neil M Johannsen, Corby K Martin, Timothy S Church, Cris A Slentz, Leanna M Ross, William E Kraus, Glen P Kenny, Gary S Goldfield, Denis Prud'homme, Ronald J Sigal, Conrad P Earnest, Brendon J Gurd,

<h4>Objective</h4>This study tested the hypothesis that greater mean changes in cardiorespiratory fitness (CRF), in either the absence or presence of reduced interindividual variability, explain larger CRF response rates following higher doses of exercise training.<h4>Methods</h4>We retrospectively analyzed CRF data from eight randomized controlled trials (RCT; n = 1590 participants) that compared at least ... Read more >>

Sports Med (Sports medicine (Auckland, N.Z.))
[2021, 51(8):1785-1797]

Cited: 1 time

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NCAA Division I American football players with sickle cell trait have altered hematological responses and hydration status.

Haoyan Wang, Matt Martone, Michael E Owens, Nathan P Lemoine, Jack Marucci, Derek Calvert, Shelly Mullenix, Timothy S Church, Jennifer Rood, Brian Harrell, Brian A Irving, Guillaume Spielmann, Neil M Johannsen,

Sickle cell trait (SCT) is a risk factor of collapse and sudden death in athletes. We conducted a longitudinal study to determine the hematological responses and hydration status in NCAA Division I American football players with SCT. The study took place over 2 years with 6 SCT and 6 position-matched controls ... Read more >>

Sci Rep (Scientific reports)
[2021, 11(1):1844]

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A Retrospective Analysis of Employee Education Level on Weight Loss Following Participation in an Online, Corporately Sponsored, Weight Loss Program.

Conrad P Earnest, Timothy S Church,

<h4>Objective</h4>To examine weight loss characteristics relative to education for employees participating in an online weight loss program.<h4>Methods</h4>We examined percent weight loss (primary outcome), the achievement of clinical cut-points (secondary outcome) by class attendance, and education strata (High School and Trade through Post-Graduate).<h4>Results</h4>Overall, the pooled cohort lost a significant percentage of ... Read more >>

J Occup Environ Med (Journal of occupational and environmental medicine)
[2020, 62(10):e573-e580]

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Adaptations to exercise in compensators and noncompensators in the E-MECHANIC Trial.

S Nicole Fearnbach, Neil M Johannsen, Candice A Myers, John W Apolzan, William D Johnson, Conrad P Earnest, Jennifer C Rood, Catrine Tudor-Locke, Melissa N Harris, Timothy S Church, Corby K Martin,

Rating of perceived exertion (RPE) and respiratory exchange ratio (RER) have previously been associated with acute exercise compensation. This study examined adaptations in the RPE and RER with long-term exercise training in individuals who did (noncompensators) and did not (compensators) lose the expected amount of weight. Participants (<i>n</i> = 110, ... Read more >>

J Appl Physiol (1985) (Journal of applied physiology (Bethesda, Md. : 1985))
[2020, 129(2):317-324]

Cited: 1 time

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Retrospective Examination of Class Attendance on Corporately Sponsored Weight Loss Programming: The Naturally Slim Experience.

Conrad P Earnest, Timothy S Church,

<h4>Objective</h4>To examine the effect of class participation in participants enrolled in a corporate sponsored commercial weight loss program.<h4>Methods</h4>We examined 111,262 participants for percent weight loss (primary outcome) using general linear models and weight loss relative to class participation (secondary outcome).<h4>Results</h4>We observed a significant trend (P < 0.001) for achieving significant weight loss ... Read more >>

J Occup Environ Med (Journal of occupational and environmental medicine)
[2020, 62(3):e102-e110]

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Impact and Lessons From the Lifestyle Interventions and Independence for Elders (LIFE) Clinical Trials of Physical Activity to Prevent Mobility Disability.

Marco Pahor, Jack M Guralnik, Stephen D Anton, Walter T Ambrosius, Steven N Blair, Timothy S Church, Mark A Espeland, Roger A Fielding, Thomas M Gill, Nancy W Glynn, Erik J Groessl, Abby C King, Stephen B Kritchevsky, Todd M Manini, Mary M McDermott, Michael E Miller, Anne B Newman, Jeff D Williamson,

<h4>Background</h4>Walking independently is basic to human functioning. The Lifestyle Interventions and Independence for Elders (LIFE) studies were developed to assess whether initiating physical activity could prevent major mobility disability (MMD) in sedentary older adults.<h4>Methods</h4>We review the development and selected findings of the LIFE studies from 2000 through 2019, including the ... Read more >>

J Am Geriatr Soc (Journal of the American Geriatrics Society)
[2020, 68(4):872-881]

Cited: 6 times

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A Randomized Community-based Exercise Training Trial in African American Men: Aerobic Plus Resistance Training and Insulin Sensitivity in African American Men.

Robert L Newton, William D Johnson, Sandra Larrivee, Chelsea Hendrick, Melissa Harris, Neil M Johannsen, Damon L Swift, Daniel S Hsia, Timothy S Church,

<h4>Purpose</h4>To examine the impact of a community-based exercise training intervention on cardiometabolic outcomes in African American men who have a family history of type 2 diabetes.<h4>Methods</h4>The Aerobic Plus Resistance Training and Insulin Sensitivity in African American Men (ARTIIS) study randomized participants into either an exercise training intervention or an information ... Read more >>

Med Sci Sports Exerc (Medicine and science in sports and exercise)
[2020, 52(2):408-416]

Cited: 1 time

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The Underappreciated Synergy of Strength Training.

Timothy S Church,

Obesity (Silver Spring) (Obesity (Silver Spring, Md.))
[2020, 28(2):224]

Cited: 0 times

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Evaluation of Step-Counting Interventions Differing on Intensity Messages.

Catrine Tudor-Locke, John M Schuna, Damon L Swift, Amber T Dragg, Allison B Davis, Corby K Martin, William D Johnson, Timothy S Church,

BACKGROUND:Step-counting interventions with discrepant intensity emphases may elicit different effects. METHODS:A total of 120 sedentary/low-active, postmenopausal women were randomly assigned to one of the following 3 groups: (1) 10,000 steps per day (with no emphasis on walking intensity/speed/cadence; basic intervention, 49 completers), (2) 10,000 steps per day and at least 30 minutes in moderate intensity ... Read more >>

J Phys Act Health (Journal of physical activity & health)
[2020, 17(1):21-28]

Cited: 3 times

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Impact of Baseline Fatigue on a Physical Activity Intervention to Prevent Mobility Disability.

Nancy W Glynn, Theresa Gmelin, Adam J Santanasto, Laura C Lovato, Brittney S Lange-Maia, Barbara J Nicklas, Roger A Fielding, Todd M Manini, Valerie H Myers, Nathalie de Rekeneire, Bonnie J Spring, Marco Pahor, Abby C King, W Jack Rejeski, Anne B Newman, ,

<h4>Objectives</h4>Our aim was to examine the impacts of baseline fatigue on the effectiveness of a physical activity (PA) intervention to prevent major mobility disability (MMD) and persistent major mobility disability (PMMD) in participants from the Lifestyle Interventions and Independence for Elders (LIFE) study.<h4>Design</h4>Prospective cohort of individuals aged 65 years or older ... Read more >>

J Am Geriatr Soc (Journal of the American Geriatrics Society)
[2020, 68(3):619-624]

Cited: 0 times

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The Efficacy of Re-Engaging in an Employer Sponsored Weight Loss Program.

Conrad P Earnest, Cody Dufour, Timothy S Church,

OBJECTIVE:To examine the clinical benefit of re-engaging in a corporate weight loss program. METHODS:Participants (N = 9885, 72% women) from two large employers. The primary outcome was percent weight change (mean, 95% confidence interval [CI]) across two identical courses using a general linear model analysis. Secondary and tertiary outcomes included the use ... Read more >>

J Occup Environ Med (Journal of occupational and environmental medicine)
[2019, 61(12):e516-e522]

Cited: 0 times

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Sleep characteristics and health-related quality of life in 9- to 11-year-old children from 12 countries.

Qian Xiao, Jean-Philippe Chaput, Timothy Olds, Mikael Fogelholm, Gang Hu, Estelle V Lambert, Carol Maher, Jose Maia, Vincent Onywera, Olga L Sarmiento, Martyn Standage, Mark S Tremblay, Catrine Tudor-Locke, Peter T Katzmarzyk, ,

INTRODUCTION:Previous studies have linked short sleep duration, poor sleep quality, and late sleep timing with lower health-related quality of life (HRQoL) in children. However, almost all studies relied solely on self-reported sleep information, and most studies were conducted in high-income countries. To address these gaps, we studied both device-measured and ... Read more >>

Sleep Health (Sleep health)
[2020, 6(1):4-14]

Cited: 5 times

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Effect of different doses of supervised exercise on food intake, metabolism, and non-exercise physical activity: The E-MECHANIC randomized controlled trial.

Corby K Martin, William D Johnson, Candice A Myers, John W Apolzan, Conrad P Earnest, Diana M Thomas, Jennifer C Rood, Neil M Johannsen, Catrine Tudor-Locke, Melissa Harris, Daniel S Hsia, Timothy S Church,

<h4>Background</h4>Exercise is recommended for weight management, yet exercise produces less weight loss than expected, which is called weight compensation. The mechanisms for weight compensation are unclear.<h4>Objective</h4>The aim of this study was to identify the mechanisms responsible for compensation.<h4>Methods</h4>In a randomized controlled trial conducted at an academic research center, adults (n = 198) ... Read more >>

Am J Clin Nutr (The American journal of clinical nutrition)
[2019, 110(3):583-592]

Cited: 17 times

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Racial Variations in Appetite-Related Hormones, Appetite, and Laboratory-Based Energy Intake from the E-MECHANIC Randomized Clinical Trial.

James L Dorling, Timothy S Church, Candice A Myers, Christoph Höchsmann, Ursula A White, Daniel S Hsia, Corby K Martin, John W Apolzan,

African Americans (AAs) have a higher obesity risk than Whites; however, it is unclear if appetite-related hormones and food intake are implicated. We examined differences in appetite-related hormones, appetite, and food intake between AAs (<i>n</i> = 53) and Whites (<i>n</i> = 111) with overweight or obesity. Participants were randomized into ... Read more >>

Nutrients (Nutrients)
[2019, 11(9):]

Cited: 1 time

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Comparison of the Cardiovascular Benefits of Resistance, Aerobic, and Combined Exercise (CardioRACE): Rationale, design, and methods.

Angelique G Brellenthin, Lorraine M Lanningham-Foster, Marian L Kohut, Yehua Li, Timothy S Church, Steven N Blair, Duck-Chul Lee,

<h4>Background</h4>The benefits of aerobic exercise (AE) for cardiovascular disease (CVD) have been well documented. Resistance exercise (RE) has been traditionally examined for its effects on bone density, physical function, or metabolic health, yet few data exist regarding the benefits of RE, independent of and combined with AE, for CVD prevention. ... Read more >>

Am Heart J (American heart journal)
[2019, 217:101-111]

Cited: 0 times

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Effect of different doses of supervised aerobic exercise on heart rate recovery in inactive adults who are overweight or obese: results from E-MECHANIC.

Christoph Höchsmann, James L Dorling, James L Dorling, John W Apolzan, Neil M Johannsen, Daniel S Hsia, Timothy S Church, Corby K Martin,

<h4>Purpose</h4>Heart rate recovery (HRR) after exercise is an independent risk factor for cardiovascular disease and mortality. Regular aerobic exercise can improve HRR, yet little is known regarding the dose necessary to promote increases. The aim was to assess the impact of different doses of vigorous-intensity aerobic exercise on HRR in ... Read more >>

Eur J Appl Physiol (European journal of applied physiology)
[2019, 119(9):2095-2103]

Cited: 0 times

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Leisure-Time Running Reduces the Risk of Incident Type 2 Diabetes.

Yuehan Wang, Duck-Chul Lee, Angelique G Brellenthin, Thijs M H Eijsvogels, Xuemei Sui, Timothy S Church, Carl J Lavie, Steven N Blair,

<h4>Objectives</h4>We examined the overall association as well as the dose-response relationship between leisure-time running and incident type 2 diabetes.<h4>Methods</h4>Participants were 19,347 adults aged 18-100 years who were free of cardiovascular disease, cancer, and diabetes at baseline, and who received at least 2 extensive preventive medical examinations between 1974 and 2006. ... Read more >>

Am J Med (The American journal of medicine)
[2019, 132(10):1225-1232]

Cited: 1 time

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Exercise is the Key to Keeping Weight Off, but What is the Key to Consistently Exercising?

Timothy S Church, Corby K Martin,

Obesity (Silver Spring) (Obesity (Silver Spring, Md.))
[2019, 27(3):361]

Cited: 0 times

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Association of Muscular Strength and Incidence of Type 2 Diabetes.

Yuehan Wang, Duck-Chul Lee, Angelique G Brellenthin, Xuemei Sui, Timothy S Church, Carl J Lavie, Steven N Blair,

<h4>Objective</h4>To examine the association between muscular strength and incident type 2 diabetes, independent of cardiorespiratory fitness (CRF).<h4>Patients and methods</h4>A total of 4681 adults aged 20 to 100 years who had no type 2 diabetes at baseline were included in the current prospective cohort study. Participants underwent muscular strength tests and ... Read more >>

Mayo Clin Proc (Mayo Clinic proceedings)
[2019, 94(4):643-651]

Cited: 8 times

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Social Participation Modifies the Effect of a Structured Physical Activity Program on Major Mobility Disability Among Older Adults: Results From the LIFE Study.

Duane B Corbett, W Jack Rejeski, Catrine Tudor-Locke, Nancy W Glynn, Stephen B Kritchevsky, Mary M McDermott, Timothy S Church, Roger A Fielding, Thomas M Gill, Abby C King, Michael E Miller, Haiying Chen, Marco Pahor, Todd M Manini, ,

<h4>Objectives</h4>To investigate whether baseline social participation modifies the effect of a long-term structured physical activity (PA) program on major mobility disability (MMD).<h4>Methods</h4>1,635 sedentary adults (70-89 years) with physical limitations were randomized to either a structured PA or health education (HE) intervention. Social participation was defined categorically at baseline. High social ... Read more >>

J Gerontol B Psychol Sci Soc Sci (The journals of gerontology. Series B, Psychological sciences and social sciences)
[2018, 73(8):1501-1513]

Cited: 4 times

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Letter to the editors.

Peter T Katzmarzyk, Timothy S Church,

J Public Health Policy (Journal of public health policy)
[2018, 39(2):254-257]

Cited: 1 time

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PRIME: A Novel Low-Mass, High-Repetition Approach to Improve Function in Older Adults.

Jason D Allen, Mitch D Vanbruggen, Neil M Johannsen, Jennifer L Robbins, Daniel P Credeur, Carl F Pieper, Richard Sloane, Conrad P Earnest, Timothy S Church, Eric Ravussin, William E Kraus, Michael A Welsch,

INTRODUCTION:The ability to maintain functional independence in a rapidly aging population results in an increased life expectancy without corresponding increases in health care costs. The accelerated decline in V˙O2peak after the age of 65 yr is primarily due to peripheral tissue changes rather than centrally mediated factors. The purpose of ... Read more >>

Med Sci Sports Exerc (Medicine and science in sports and exercise)
[2018, 50(5):1005-1014]

Cited: 2 times

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Does exercise aid smoking cessation through reductions in anxiety sensitivity and dysphoria?

Michael J Zvolensky, David Rosenfield, Lorra Garey, Brooke Y Kauffman, Kirsten J Langdon, Mark B Powers, Michael W Otto, Michelle L Davis, Bess H Marcus, Timothy S Church, Georita M Frierson, Lindsey B Hopkins, Daniel J Paulus, Scarlett O Baird, Jasper A J Smits,

<h4>Objective</h4>Research shows that high anxiety sensitivity (AS) and dysphoria are related to poor smoking cessation outcomes. Engaging in exercise may contribute to improvement in smoking cessation outcomes through reductions in AS and dysphoria. In the current study, we examined whether exercise can aid smoking cessation through reductions in AS and ... Read more >>

Health Psychol (Health psychology : official journal of the Division of Health Psychology, American Psychological Association)
[2018, 37(7):647-657]

Cited: 3 times

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