A M Johnstone

Summary

Affiliation: Rowett Research Institute
Country: UK

Publications

  1. ncbi request reprint Factors influencing variation in basal metabolic rate include fat-free mass, fat mass, age, and circulating thyroxine but not sex, circulating leptin, or triiodothyronine
    Alexandra M Johnstone
    Aberdeen Centre for Energy Regulation and Obesity, Division of Energy Balance and Obesity, Rowett Research Institute, Aberdeen, Scotland, United Kingdom
    Am J Clin Nutr 82:941-8. 2005
  2. ncbi request reprint Effects of a high-protein ketogenic diet on hunger, appetite, and weight loss in obese men feeding ad libitum
    Alexandra M Johnstone
    Division of Obesity and Metabolic Health and Biomathematics and Statistics Scotland, Rowett Research Institute, Aberdeen, United Kingdom
    Am J Clin Nutr 87:44-55. 2008
  3. ncbi request reprint Fasting - the ultimate diet?
    A M Johnstone
    Rowett Research Institute, Aberdeen, UK
    Obes Rev 8:211-22. 2007
  4. ncbi request reprint Additional anthropometric measures may improve the predictability of basal metabolic rate in adult subjects
    A M Johnstone
    Aberdeen Centre for Energy Regulation and Obesity ACERO, Division of Obesity and Metabolic Health, Rowett Research Institute, Aberdeen, UK
    Eur J Clin Nutr 60:1437-44. 2006
  5. ncbi request reprint The effect of graded levels of exercise on energy intake and balance in free-living women
    R J Stubbs
    The Rowett Research Institute, Bucksburn, Aberdeen, UK
    Int J Obes Relat Metab Disord 26:866-9. 2002
  6. ncbi request reprint Effect of altering the variety of sensorially distinct foods, of the same macronutrient content, on food intake and body weight in men
    R J Stubbs
    The Rowett Research Institute, Bucksburn, Aberdeen, UK
    Eur J Clin Nutr 55:19-28. 2001
  7. ncbi request reprint Rate and extent of compensatory changes in energy intake and expenditure in response to altered exercise and diet composition in humans
    R J Stubbs
    Rowett Research Institute, Greenburn Road, Bucksburn, Aberdeen, AB21 9SB
    Am J Physiol Regul Integr Comp Physiol 286:R350-8. 2004
  8. ncbi request reprint The use of visual analogue scales to assess motivation to eat in human subjects: a review of their reliability and validity with an evaluation of new hand-held computerized systems for temporal tracking of appetite ratings
    R J Stubbs
    Rowett Research Institute, Bucksburn, Aberdeen, UK
    Br J Nutr 84:405-15. 2000
  9. ncbi request reprint Description and evaluation of a Newton-based electronic appetite rating system for temporal tracking of appetite in human subjects
    R J Stubbs
    Aberdeen Centre for Energy Regulation and Obesity, Rowett Research Institute, Greenburn Road, Bucksburn, Aberdeen, Scotland AB21 9SB, UK
    Physiol Behav 72:615-9. 2001
  10. ncbi request reprint Plasma leptin levels are related to body composition, sex, insulin levels and the A55V polymorphism of the UCP2 gene
    K A Rance
    Aberdeen Centre for Energy Regulation and Obesity ACERO, Rowett Research Institute, Bucksburn, Aberdeen, Scotland, UK
    Int J Obes (Lond) 31:1311-8. 2007

Detail Information

Publications26

  1. ncbi request reprint Factors influencing variation in basal metabolic rate include fat-free mass, fat mass, age, and circulating thyroxine but not sex, circulating leptin, or triiodothyronine
    Alexandra M Johnstone
    Aberdeen Centre for Energy Regulation and Obesity, Division of Energy Balance and Obesity, Rowett Research Institute, Aberdeen, Scotland, United Kingdom
    Am J Clin Nutr 82:941-8. 2005
    ..All studies agree that variation in fat-free mass (FFM) plays a major role, but effects of fat mass (FM), age, sex, and the hormones leptin, triiodothyrionine (T3), and thyroxine (T4) remain uncertain...
  2. ncbi request reprint Effects of a high-protein ketogenic diet on hunger, appetite, and weight loss in obese men feeding ad libitum
    Alexandra M Johnstone
    Division of Obesity and Metabolic Health and Biomathematics and Statistics Scotland, Rowett Research Institute, Aberdeen, United Kingdom
    Am J Clin Nutr 87:44-55. 2008
    ..Altering the macronutrient composition of the diet influences hunger and satiety. Studies have compared high- and low-protein diets, but there are few data on carbohydrate content and ketosis on motivation to eat and ad libitum intake...
  3. ncbi request reprint Fasting - the ultimate diet?
    A M Johnstone
    Rowett Research Institute, Aberdeen, UK
    Obes Rev 8:211-22. 2007
    ..This review asks the following three questions, pertinent to any weight-loss therapy, (i) how effective is the regime in achieving weight loss, (ii) what impact does it have on psychology? and finally, (iii) does it work long-term?..
  4. ncbi request reprint Additional anthropometric measures may improve the predictability of basal metabolic rate in adult subjects
    A M Johnstone
    Aberdeen Centre for Energy Regulation and Obesity ACERO, Division of Obesity and Metabolic Health, Rowett Research Institute, Aberdeen, UK
    Eur J Clin Nutr 60:1437-44. 2006
    ..However, because body composition is a key influencing factor, there will be error in calculating an individual's basal requirements based on this prediction...
  5. ncbi request reprint The effect of graded levels of exercise on energy intake and balance in free-living women
    R J Stubbs
    The Rowett Research Institute, Bucksburn, Aberdeen, UK
    Int J Obes Relat Metab Disord 26:866-9. 2002
    ..We assessed the effect of graded increases in exercised-induced energy expenditure (EE) on appetite, daily energy intake (EI), total daily EE and body weight in six lean women using a within-subject, repeated measures design...
  6. ncbi request reprint Effect of altering the variety of sensorially distinct foods, of the same macronutrient content, on food intake and body weight in men
    R J Stubbs
    The Rowett Research Institute, Bucksburn, Aberdeen, UK
    Eur J Clin Nutr 55:19-28. 2001
    ..To examine the effect of increasing the variety of sensorially distinct but nutritionally identical foods on appetite, food intake and body weight, over 7 days, in men...
  7. ncbi request reprint Rate and extent of compensatory changes in energy intake and expenditure in response to altered exercise and diet composition in humans
    R J Stubbs
    Rowett Research Institute, Greenburn Road, Bucksburn, Aberdeen, AB21 9SB
    Am J Physiol Regul Integr Comp Physiol 286:R350-8. 2004
    ..These changes were significant, small but persistent, amounting to approximately 0.2 and approximately 0.35 MJ/day for EI and EE, respectively...
  8. ncbi request reprint The use of visual analogue scales to assess motivation to eat in human subjects: a review of their reliability and validity with an evaluation of new hand-held computerized systems for temporal tracking of appetite ratings
    R J Stubbs
    Rowett Research Institute, Bucksburn, Aberdeen, UK
    Br J Nutr 84:405-15. 2000
    ..However, subjects appear to exhibit a significantly more constrained use of the scale when using the EARS relative to the P&P. For this reason it is recommended that the two techniques are not used interchangeably...
  9. ncbi request reprint Description and evaluation of a Newton-based electronic appetite rating system for temporal tracking of appetite in human subjects
    R J Stubbs
    Aberdeen Centre for Energy Regulation and Obesity, Rowett Research Institute, Greenburn Road, Bucksburn, Aberdeen, Scotland AB21 9SB, UK
    Physiol Behav 72:615-9. 2001
    ..These data suggest that the EARS is a useful and reliable technique for real-time data collection in appetite research but that it should not be used interchangeably with paper and pen techniques...
  10. ncbi request reprint Plasma leptin levels are related to body composition, sex, insulin levels and the A55V polymorphism of the UCP2 gene
    K A Rance
    Aberdeen Centre for Energy Regulation and Obesity ACERO, Rowett Research Institute, Bucksburn, Aberdeen, Scotland, UK
    Int J Obes (Lond) 31:1311-8. 2007
    ..We therefore wanted to determine the roles of variation in body composition, age, sex and polymorphisms of the UCP2 gene and promoter region on levels of circulating leptin...
  11. doi request reprint Polymorphisms of the FTO gene are associated with variation in energy intake, but not energy expenditure
    John R Speakman
    Division of Obesity and Metabolic Health, Rowett Research Institute, Aberdeen, Scotland, UK
    Obesity (Silver Spring) 16:1961-5. 2008
    ..5 MJ for the "at risk" AT and AA genotypes, respectively. Adjusting intake for BMR did not remove the significance (P = 0.043). FTO genotype probably affects obesity via effects on food intake rather than energy expenditure...
  12. ncbi request reprint How covert are covertly manipulated diets?
    R J Stubbs
    Rowett Research Institute, Greenburn Road, Bucksburn, Aberdeen, UK
    Int J Obes Relat Metab Disord 25:567-73. 2001
    ..Average percentage protein:fat:carbohydrate (by energy) and energy density (ED) of the two diets were 13:25:62, 371 kJ/100 g and 13:50:37, 672 kJ/100 g, respectively...
  13. ncbi request reprint The effect of graded levels of exercise on energy intake and balance in free-living men, consuming their normal diet
    R J Stubbs
    The Rowett Research Institute, Bucksburn, Aberdeen, Scotland, UK
    Eur J Clin Nutr 56:129-40. 2002
    ..To assess the effect of graded increases in exercised-induced energy expenditure (EE) on appetite, energy intake (EI), total daily EE and body weight in men living in their normal environment and consuming their usual diets...
  14. ncbi request reprint Effect of an acute fast on energy compensation and feeding behaviour in lean men and women
    A M Johnstone
    Rowett Research Institute, Aberdeen, UK
    Int J Obes Relat Metab Disord 26:1623-8. 2002
    ..This study examined how a 36 h fast effected the subsequent day's energy and nutrient intake in a group of 24 healthy, lean men and women...
  15. ncbi request reprint A decrease in physical activity affects appetite, energy, and nutrient balance in lean men feeding ad libitum
    R James Stubbs
    Biomathematics and Statistics Scotland, Aberdeen, United Kingdom
    Am J Clin Nutr 79:62-9. 2004
    ..It is not clear how decreased activity quantitatively affects energy balance (EB) in subjects feeding ad libitum...
  16. ncbi request reprint Plasma concentrations of alpha-MSH, AgRP and leptin in lean and obese men and their relationship to differing states of energy balance perturbation
    Nigel Hoggard
    Rowett Research Institute, Aberdeen, UK
    Clin Endocrinol (Oxf) 61:31-9. 2004
    ..We aimed to determine whether circulating alpha-MSH and AgRP are responsive to long-term perturbations in energy balance, in a manner consistent with their central putative functions...
  17. doi request reprint The effect of an incremental increase in exercise on appetite, eating behaviour and energy balance in lean men and women feeding ad libitum
    Stephen Whybrow
    The Rowett Research Institute, Greenburn Road, Aberdeen AB21 9SB, UK
    Br J Nutr 100:1109-15. 2008
    ..However, the degree of compensation varied considerably among individuals. The present study captured the initial compensation in EI for exercise-induced energy deficits. Total compensation would take a matter of weeks...
  18. ncbi request reprint Impact of high-protein diets with either moderate or low carbohydrate on weight loss, body composition, blood pressure and glucose tolerance in rats
    Gerald E Lobley
    Obesity and Metabolic Health Division, Rowett Research Institute, Bucksburn, Aberdeen AB21 9SB, UK
    Br J Nutr 97:1099-108. 2007
    ..011) that was not different from those of stock animals. These improvements occurred despite differences in fat gain, and indicate that both weight loss and macronutrient intake can impact favourably on obesity-associated morbidities...
  19. doi request reprint Human colonic microbiota associated with diet, obesity and weight loss
    S H Duncan
    Rowett Institute of Nutrition and Health, University of Aberdeen, Bucksburn, Aberdeen, UK
    Int J Obes (Lond) 32:1720-4. 2008
    ..It has been proposed that the development of obesity in humans is influenced by the relative proportions of the two major phyla of bacteria (Bacteroidetes and Firmicutes) present in the large intestine...
  20. doi request reprint Assessment of body image in obesity using a digital morphing technique
    A M Johnstone
    Rowett Research Institute, Aberdeen, UK
    J Hum Nutr Diet 21:256-67. 2008
    ..Historically, body image research has relied on generic, whole body outlines, which may not be suited to obese individuals. The development of computer generated, individualized digital images to represent body image may be more effective...
  21. ncbi request reprint The effect of rate and extent of weight loss on urea salvage in obese male subjects
    Peter Faber
    Rowett Research Institute, Greenburn Road, Bucksburn, Aberdeen AB21 9SB, Scotland, UK
    Br J Nutr 90:221-31. 2003
    ..It was concluded that no adaptive changes in urea kinetics occurred in response to either the different rate or extent of weight loss...
  22. doi request reprint Evaluating energy intake measurement in free-living subjects: when to record and for how long?
    Claire L Fyfe
    Division of Obesity and Metabolic Health, Rowett Institute of Nutrition and Health, University of Aberdeen, Aberdeen AB21 9SB, UK
    Public Health Nutr 13:172-80. 2010
    ..To nutritionally analyse mean energy intake (EI) from different 3 d intervals within a 7 d recording period and to evaluate the seasonal effect on energy and nutrient intake...
  23. ncbi request reprint The effect of rate of weight loss on erythrocyte glutathione concentration and synthesis in healthy obese men
    Peter Faber
    Rowett Research Institute, Greenburn Road, Bucksburn, Aberdeen AB21 9SB, Scotland, UK
    Clin Sci (Lond) 102:569-77. 2002
    ..An acute reduction in GSH synthesis in response to a rapid weight loss may constitute a risk factor during periods of increased GSH demands...
  24. ncbi request reprint Influence of short-term dietary weight loss on cortisol secretion and metabolism in obese men
    Alexandra M Johnstone
    Rowett Research Institute, Greenburn Road, Bucksburn, Aberdeen AB21 9SB, UK
    Eur J Endocrinol 150:185-94. 2004
    ..Cause and effect between obesity and abnormal cortisol metabolism is untested...
  25. pmc Reduced dietary intake of carbohydrates by obese subjects results in decreased concentrations of butyrate and butyrate-producing bacteria in feces
    Sylvia H Duncan
    Microbial Ecology Group, Rowett Research Institute, Greenburn Road, Bucksburn, Aberdeen AB21 9SB, UK
    Appl Environ Microbiol 73:1073-8. 2007
    ..1%, and 1.9%, respectively; P = 0.026) decreased as carbohydrate intake decreased. The abundance of butyrate-producing bacteria related to Roseburia spp. and E. rectale correlated well with the decline in fecal butyrate...
  26. ncbi request reprint Dietary macronutrient content alters cortisol metabolism independently of body weight changes in obese men
    Roland H Stimson
    Endocrinology Unit, Centre for Cardiovascular Science, Queen s Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, United Kingdom
    J Clin Endocrinol Metab 92:4480-4. 2007
    ..However, whether longer-term differences in dietary macronutrients affect cortisol metabolism in humans and contribute to the tissue-specific dysregulation of cortisol metabolism in obesity is unknown...