Sophie Killer

Sophie Killer
British Athletics · Science & Medicine

PhD

About

25
Publications
21,622
Reads
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348
Citations
Introduction
Dr Sophie Killer is the Lead Performance Nutritionist for British Athletics, responsible for the Olympic and Paralympic Track & Field teams. Sophie graduated from Lougborough University with a PhD in Exercise Metabolism, where she now holds a position as Visiting Fellow in Sports Nutrition and PhD supervisor.
Additional affiliations
October 2014 - March 2015
University of Kent
Position
  • Post Doctoral RA & Lecturer
October 2014 - March 2015
University of Kent
Position
  • Post Doctoral RA & Lecturer
August 2012 - August 2014
Loughborough University
Position
  • PhD Student
Education
October 2010 - July 2014
Loughborough University
Field of study
  • Exercise Metabolism & Performance Nutrition
January 2010 - September 2012
International Olympic Committee
Field of study
  • Sports Nutrition
October 2007 - June 2010
University of Birmingham
Field of study
  • Sport and Exercise Sciences

Publications

Publications (25)
Article
Full-text available
Abstract Purpose Antimicrobial proteins (AMPs) in saliva including secretory immunoglobulin A (SIgA), lactoferrin (SLac) and lysozyme (SLys) are important in host defence against oral and respiratory infections. This study investigated the effects of hydration status on saliva AMP responses to endurance exercise. Methods Using a randomized design,...
Thesis
Lifestyle choices threaten to compromise health and performance of trained athletes. This thesis presents a series of studies which broadly investigated the impact of nutritional and physical challenges to human health and performance. The potential causes and effects of fluid imbalances on physical health, immune function and athletic performance...
Article
Full-text available
Purpose: This study investigated the impact of intensified training (IT) and carbohydrate (CHO) supplementation on resting and exercise-induced oxidative stress. Methods: Male cyclists (n=13, mean ± SD: age 25 ± 6 years; VO2max 72 ± 5 ml/kg/min) undertook two 9-day periods of endurance-based IT. In a counterbalanced, crossover and double-blinded st...
Article
Full-text available
It is often suggested that coffee causes dehydration and its consumption should be avoided or significantly reduced to maintain fluid balance. The aim of this study was to directly compare the effects of coffee consumption against water ingestion across a range of validated hydration assessment techniques. In a counterbalanced cross-over design, 50...
Article
Full-text available
Carbohydrate ingested 30-60 min before exercise may result in hypoglycaemia during exercise, a phenomenon often called rebound or reactive hypoglycaemia. There is considerable confusion regarding pre-exercise carbohydrate feeding with advice that ranges from 'consume carbohydrate in the hour before exercise' to 'avoid carbohydrate in the 60 min pri...
Article
Full-text available
Magnesium plays a critical role in athlete health and performance. It is involved in numerous physiological mechanisms that support energy production, immune function, pain modulation, muscle function and bone health. Athletes may be susceptible to magnesium deficiency due to an increased utilization during exercise. Objective: This study reports o...
Article
Full-text available
Athletes participating in the athletics (track and field) events of jumps, throws, and combined events (CEs; seven-event heptathlon and 10-event decathlon) engage in training and competition that emphasize speed and explosive movements, requiring optimal power-weight ratios. While these athletes represent a wide range of somatotypes, they share an...
Article
Full-text available
Evidence suggests that periods of heavy intense training can result in impaired immune cell function, and whether this leaves elite athletes at greater risk of infections and upper respiratory symptoms (URS) is still debated. There is some evidence that episodes of URS do cluster around important periods of competition and intense periods of traini...
Article
Periods of short-term intensified training (IT) are often used by athletes during training cycles over the season and undergoing phases of increased physical stress may impact upon the immune system. This study investigated the effects of a period of IT on free light chains (FLCs) in saliva - an emerging immune biomarker of oral inflammation - and...
Poster
Full-text available
Magnesium (Mg) is an essential mineral involved in >350 enzymatic reactions. Previous research has shown Mg status to be lower in elite athlete populations compared with non-athletes, despite similar intakes of dietary Mg. It has been suggested that exercise increases Mg losses in sweat and urine which may contribute to the low Mg statuses reporte...
Poster
Full-text available
PRACTICAL MESSAGE: Repeated analysis of Mg across a season is important for maintaining health and performance in athletes and should be assessed in RBCs where possible.
Article
Full-text available
Purpose: To determine effects of intensified training (IT) and carbohydrate supplementation on overreaching and immunity. Methods: In a randomized, double-blind, crossover design, 13 male cyclists (age 25 ± 6 years, [Formula: see text] 72 ± 5 ml/kg/min) completed two 8-day periods of IT. On one occasion, participants ingested 2 % carbohydrate (L...
Article
Full-text available
Background: Free light chains (FLCs) have a range of biological functions and may act as a broad marker of immunesuppression and activation and inflammation. Measurement of salivary FLCs may provide practical advantages in a range of clinical populations. The aim of the present study was to develop normal reference ranges of FLCs in saliva and ass...
Article
Full-text available
Few studies have investigated the effects of exercise training on sleep physiology in well-trained athletes. We investigated changes in sleep markers, mood state and exercise performance in well-trained cyclists undergoing short-term intensified training and carbohydrate nutritional intervention. Thirteen highly-trained male cyclists (age: 25 ± 6y,...
Conference Paper
Full-text available
The physical, mental and hormonal responses to short-term intensified training in well-trained cyclists with a high carbohydrate nutritional intervention
Conference Paper
RESULTS: Both WP+AFRTop and WP+RegTop resulted in a ~1.8 fold greater cumulative ΔHb relative to CON (p ≤ 0.05). When both clothing ensembles were compared, EHL and ΔHb were similar at the end of all four exercise and recovery periods (all p > 0.05). In parallel, the cumulative ΔHb for all exercise/recovery cycles was not different between WP+AFRTo...
Conference Paper
Upper respiratory tract infections are particularly prevalent during intensified training (IT) or competition, and in athletes suffering from overreaching (OR). High carbohydrate intake may play a role in prevention of OR and alleviate potential immunosuppression. PURPOSE: To determine the effects of IT and carbohydrate supplementation on plasma ho...
Article
Full-text available
Elevated antigen-stimulated anti-inflammatory cytokine production appears to be a risk factor for upper respiratory tract illness in athletes. The purpose of this study was to determine the effects of prolonged exercise and hydration on antigen-stimulated cytokine production. Twelve healthy males cycled for 120 min at 60% on two occasions, either e...
Conference Paper
Full-text available
Antimicrobial proteins (AMPs) in saliva including secretory immunoglobulin A (SIgA), lactoferrin (SLac) and lysozyme (SLys) are important in host defence against oral and respiratory infections. This study investigated the effects of hydration status on saliva AMP responses to endurance exercise. Using a randomized design, 10 healthy male participa...
Article
Full-text available
Tennis is a pan-global sport that is played year-round in both hemispheres. This places notable demands on the physical and psychological preparation of players and included in these demands are nutritional and fluid requirements both of training and match-play. Thus, the purpose of this article is to review nutritional recommendations for tennis....
Conference Paper
Full-text available
It is often suggested that coffee causes dehydration and should be avoided or reduced to maintain fluid balance. The aim of this study was to directly compare the chronic effects of moderate coffee consumption against water across a range of standardized hydration assessment techniques. In a counterbalanced crossover design, 50 habitual coffee-drin...

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