James C. Morehen
A5021023307- Sports Performance and Training
- Muscle metabolism and nutrition
- Body Composition Measurement Techniques
- Obesity, Physical Activity, Diet
- Sports injuries and prevention
- Exercise and Physiological Responses
- Nutritional Studies and Diet
- Behavioral Health and Interventions
- Diet and metabolism studies
- Evolutionary Psychology and Human Behavior
- Motivation and Self-Concept in Sports
- Thermoregulation and physiological responses
- Cardiovascular and exercise physiology
- Child Nutrition and Water Access
- Climate Change and Health Impacts
- Nutrition and Health in Aging
- Sport Psychology and Performance
- Birth, Development, and Health
- Animal Behavior and Reproduction
- Gut microbiota and health
- Spaceflight effects on biology
- Adipose Tissue and Metabolism
- Physical Activity and Health
- Agriculture Sustainability and Environmental Impact
- Cardiovascular Effects of Exercise
Liverpool John Moores University
2015-2025
The Football Association
2021
Total daily energy expenditure ("total expenditure") reflects needs and is a critical variable in human health physiology, but its trajectory over the life course poorly studied. We analyzed large, diverse database of total measured by doubly labeled water method for males females aged 8 days to 95 years. increased with fat-free mass power-law manner, four distinct stages. Fat-free mass-adjusted accelerates rapidly neonates ~50% above adult values at ~1 year; declines slowly levels ~20...
Understanding the impacts of activity on energy balance is crucial. Increasing levels may bring diminishing returns in expenditure because compensatory responses non-activity expenditures.1Pontzer H. Durazo-Arvizu R. Dugas L.R. Plange-Rhule J. Bovet P. Forrester T.E. Lambert E.V. Cooper R.S. Schoeller D.A. Luke A. Constrained total and metabolic adaptation to physical adult humans.Curr. Biol. 2016; 26: 410-417Abstract Full Text PDF PubMed Scopus (145) Google Scholar, 2Halsey L.G. The mystery...
The doubly labeled water (DLW) method measures total energy expenditure (TEE) in free-living subjects. Several equations are used to convert isotopic data into TEE. Using the International Atomic Energy Agency (IAEA) DLW database (5,756 measurements of adults and children), we show considerable variability is introduced by different equations. estimated rCO2 sensitive dilution space ratio (DSR) two isotopes. Based on performance validation studies, propose a new equation based estimate mean...
Water is essential for survival, but one in three individuals worldwide (2.2 billion people) lacks access to safe drinking water. intake requirements largely reflect water turnover (WT), the used by body each day. We investigated determinants of human WT 5604 people from ages 8 days 96 years 23 countries using isotope-tracking (
Abstract Nutritional epidemiology aims to link dietary exposures chronic disease, but the instruments for evaluating intake are inaccurate. One way identify unreliable data and sources of errors is compare estimated intakes with total energy expenditure (TEE). In this study, we used International Atomic Energy Agency Doubly Labeled Water Database derive a predictive equation TEE using 6,497 measures in individuals aged 4 96 years. The resultant regression predicts expected from easily...
This qualitative study explores player and stakeholder perceptions of the role nutrition in supporting development performance elite female soccer.Semi-structured interviews (36 ± 18 mins length) were conducted with 47 participants, including players (n = 12), parents 9), coaches sport scientists 7), nutritionists 5) medical staff 5). Via thematic analysis, data provided an insight into culture within women's soccer.Data demonstrate that considerable confusion misconceptions exist amongst...
Rugby League is a high-intensity collision sport competed over 80 min. Training loads are monitored to maximize recovery and assist in the design of nutritional strategies although no data available on total energy expenditure (TEE) players. We therefore assessed resting metabolic rate (RMR) TEE six Super players 2 consecutive weeks in-season including one game per week. Fasted RMR was followed by baseline urine sample before oral administration bolus dose hydrogen (deuterium 2H) oxygen...
Physical activity may be a way to increase and maintain fat-free mass (FFM) in later life, similar the prevention of fractures by increasing peak bone mass.
In mammals, trait variation is often reported to be greater among males than females. However, date, mainly only morphological traits have been studied. Energy expenditure represents the metabolic costs of multiple physical, physiological, and behavioral traits. could exhibit particularly high male through a cumulative effect if those mostly variation, or lack many them do not. Sex differences in energy little explored. We analyzed large database on adult humans (1494 3108 females)...
Abstract Low total energy expenditure (TEE, MJ/d) has been a hypothesized risk factor for weight gain, but repeatability of TEE, critical variable in longitudinal studies balance, is understudied. We examine repeated doubly labeled water (DLW) measurements TEE 348 adults and 47 children from the IAEA DLW Database (mean ± SD time interval: 1.9 2.9 y) to assess if adjusted age, sex, fat-free mass, fat mass associated with changes or body composition. Here, we report that high adults, not...
Abstract Rugby League (RL) match‐play causes muscle damage, inflammation and symptoms of fatigue. To facilitate recovery, nutritional interventions are often employed, including Montmorency cherry juice (MC). We assessed the effects MC on recovery following RL in eleven male professional players who played two matches (7‐days apart) with or placebo (PLB) supplemented for 5‐days pre‐match, matchday 2‐days post‐match. Blood was collected 48h half‐time, within 30‐mins full‐time post‐match to...
The purpose of this study is to quantify total daily energy expenditure (TEE) international adult female soccer players.Twenty-four professional players were studied during a 12-d period where they participated in an training camp (also inclusive two competitive games) representing the English national team. TEE was assessed via doubly labeled water method full 12 d as well initial 4-d before game one. Energy intake also (via weighed food analysis) permit estimation availability (EA).Mean...
This qualitative study explores player and stakeholder perceptions of menstrual health support in elite female soccer.Semi-structured interviews were conducted with 47 participants including players (n = 12), parents 9), coaches sport scientists 7), nutritionists 5) medical staff 5).Via thematic analysis, data demonstrate that soccer experience a range physical psychological symptoms primarily at the onset during menses (as also perceived by stakeholders), most perceiving these to impact...
Rugby league is a collision sport which traditionally adopts large emphasis on lean muscle mass. Currently there limited research the anthropometry of European Super League players. The aim this study was to assess body composition using Dual Energy X-ray Absorptiometry (DXA) scans identify typical profile elite rugby One hundred and twelve players from five different clubs competing in were recruited for study. DXA performed total mass, fat mass percentage reported each positional group....
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Weight cycling is thought to increase the risk of obesity and cardiometabolic disease in nonathletic athletic populations. However, magnitude frequency weight not well characterized elite athletes. To this end, we quantified practices a male World Champion professional boxer competing at super middleweight (76.2 kg). Over 5-year period comprising 11 contests, assessed changes body mass (n = 8 contests) composition 6 during training camp preceding each contest. Time taken make was ± 4 weeks...
There is considerably greater variation in metabolic rates between men than women, terms of basal, activity and total (daily) energy expenditure (EE). One possible explanation that EE associated with male sexual characteristics (which are known to vary more other traits) such as musculature athletic capacity. Such traits might be predicted most prominent during periods adolescence young adulthood, when behaviour develops peaks. We tested this hypothesis on a large dataset by comparing the...
Abstract Rugby League is a team sport requiring players to experience large impact collisions, thus high amounts of muscle mass. Many (academy and senior) strive increase mass during the pre‐season, however, quantification changes this period have not been thoroughly investigated. We therefore assessed in body‐composition using Dual X‐Ray Absorptiometry (DXA) eleven academy over three successive pre‐seasons ninety‐three senior from four different European Super clubs prior to, at end of,...