Catherine Norton

Catherine Norton
University of Limerick | UL · Faculty of Education and Health Sciences

BSc Human Nutrition & Dietetics, PhD Performance Nutrition

About

18
Publications
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Publications

Publications (18)
Article
Full-text available
Crohn’s disease (CD) is a debilitating inflammatory bowel condition of unknown aetiology that is growing in prevalence globally. Large-scale studies have determined associations between female obesity or low body mass index (BMI) with risk of CD at all ages or 8– < 40 years, respectively. For males, low BMI entering adult life is associated with in...
Article
Supplementing postexercise carbohydrate (CHO) intake with protein has been suggested to enhance recovery from endurance exercise. The aim of this study was to investigate whether adding protein to the recovery drink can improve 24-hr recovery when CHO intake is suboptimal. In a double-blind crossover design, 12 trained men performed three 2-day tri...
Article
Full-text available
The revised European consensus defined sarcopenia as a progressive and generalized skeletal muscle disorder that is associated with an increased likelihood of adverse outcomes including falls, fractures, physical disability and mortality. The aim of this study was to determine the prevalence of sarcopenia and analyse the influence of diet, physical...
Article
Full-text available
The novel coronavirus disease (COVID-19) pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has engulfed the world, affecting more than 180 countries. As a result, there has been considerable economic distress globally and a significant loss of life. Sadly, the vulnerable and immunocompromised in our societies seem to b...
Article
Full-text available
Background: The aim of this study was to investigate the effect of whey protein supplementation on myofibrillar protein synthesis (myoPS) and muscle recovery over a 7-d period of intensified resistance training (RT). Methods: In a double-blind randomised parallel group design, 16 resistance-trained men aged 18 to 35 years completed a 7-d RT prot...
Article
Full-text available
Key opinion leaders in sport and exercise nutrition advocate for a personalised and periodised approach to dietary assessment and prescription. However, practice has not advanced to this level, making recommendations from key researchers unexploited in the applied setting. Our objective was to advance traditional nutritional assessment methods (dat...
Article
Full-text available
The aim of this study was to test the effects of two disparate isonitrogenous, isocaloric pre-exercise feeds on deuterium-oxide (D2O) derived measures of myofibrillar protein synthesis (myoPS) in humans. Methods: In a double-blind parallel group design, 22 resistance-trained men aged 18 to 35 years ingested a meal (6 kcal·kg−1, 0.8 g·kg−1 carbohydr...
Article
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The diurnal rhythm of bone remodeling suggests nocturnal dietary intervention to be most effective. This study investigated the effect of bedtime ingestion of a calcium-fortified, milk-derived protein matrix (MBPM) or maltodextrin (CON) on acute (0–4 h) blood and 24-h urinary change in biomarkers of bone remodeling in postmenopausal women with oste...
Article
Objective The aim of this research was the development and validation of a translational model for the evaluation of exercise and nutrient stimulated muscle protein synthesis (MPS). To achieve this overall aim, three primary objectives had to be realised: (i) Development of an in vitro skeletal muscle cell bioassay to measure muscle growth and MPS;...
Article
Full-text available
The age-related decline in functional capability is preceded by a reduction in muscle quality. The purpose of this study was to assess the combined effects of progressive resistance training (PRT) and protein supplementation beyond habitual intakes on upper leg lean tissue mass (LTM), muscle quality and functional capability in healthy 50 – 70y wom...
Article
Full-text available
Background: Key areas of research on the preservation of lean tissue mass (LTM) during aging are determinations of the protein requirement and optimal protein intake at meals. Objective: The aim of this study was to determine the effect of protein supplementation at breakfast and lunch for 24 wk beyond habitual intakes on whole-body LTM in healt...
Article
Sarcopenia has been attributed to a diminished postprandial muscle protein synthetic response. Differences in digestion and absorption kinetics of dietary protein and/or its amino acid composition have been suggested to modulate postprandial muscle protein accretion. The amino acid composition of dairy protein, especially whey, has the potential to...
Article
Full-text available
A method to estimate dietary total antioxidant capacity among elderly Irish women - Volume 72 Issue OCE4 - C. Norton, P. Jakeman

Projects

Project (1)
Project
For summary see http://atlasofscience.org/from-cell-to-society/#more-3796 Our primary research focus is an understanding of the mechanism(s) by which nutrition and physical activity interact to regulate lean tissue mass, principally skeletal muscle. From a nutritional perspective, we employ cell-based studies of muscle tissue in vitro to inform how protein and other nutrients, present following digestion and absorption in the circulation in vivo, influence muscle protein synthesis (MPS) and regulate muscle tissue mass. It is now understood that a protein containing meal shifts the balance towards a higher rate of protein synthesis in muscle tissue (MPS) rather than breakdown (MPB). Given that we eat 3 main meals per day that’s ~1000 opportunities per annum to prevent or delay the onset of sarcopenia!