Background: Previous research suggests associations between energy balance, eating frequency, macronutrient content, and macronutrient distribution with body composition. In particular, energy balance and protein intake have been conventionally evaluated in 24-hr time blocks, consistent with dietary recommendations and general public understanding. However, there is a potential benefit to investigating energy balance and protein intake in smaller increments of time to account for dynamic changes that occur within-day.Objective: The purpose of this study was to evaluate protein intake/distribution relative to energy balance fluctuations during the day and body composition in collegiate female basketball players.Methods: Subjects provided information on dietary intake and expenditure. Body composition was assessed by multi-current bioelectrical impedance. Energy balance (EB) and related protein distribution variables were determined with a Computerized Time-Line Energy Analysis procedure. Data were analyzed for associations between energy balance, protein intake and distribution, and body composition. Data are displayed as either traditional 24-hr EB and total protein intake or dynamic protein variables in relation to real-time EB (ingestion within ± 400 kcal EB or > 0 kcal EB).Results: There was no relationship between net 24-hr energy balance and percentage body fat. A statistically significant positive relationship was observed between total protein intake and body fat mass (R = .597; p = .031). No relationship was observed between protein distribution variables (g in ± 400 kcal EB, g in > 0 kcal EB) and percentage body fat. Protein eating occurrences (>10g, ± 400 kcal EB) was inversely correlated with BMI (R = -.650; p = .016). Subjects with the greatest energy deficits presented with lower lean body mass (R= -.736; p = .004).Conclusion: These data suggest that within-day protein distribution relative to energy balance are associated with BMI, but not with percentage body fat. Those with the highest protein intake had the highest body fat mass, with no correlation between protein intake and total energy intake detected. In this group, no association between 24hr intake net values or within-day intake values were found to be related to body fat percentage. However, the greatest energy balance deficit during the day was strongly inversely associated with lean body mass, indicative of potentially deleterious effects of energy restriction.

This thesis is focused on EU-Russia relations, the import of fossil fuels, especially oil and natural gas, which form the main items of trade between the EU and Russia. The work is divided into three chapters devoted to the energy deficit in the EU, the analysis of Russian gas and oil sector. The last chapter focuses on the analysis of the linkages and cooperation in the energy field. The aim is to determine the interdependence of the two units, the main differences and similarities that define the direction of cooperation and draw a trend and direction of EU-Russia relations in the energy sector to the future.

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<p>What a ride it has been. The ups and downs of the McMaster graduate program has been a sweet one. It has been a pleasure working with the Exercise Metabolism Research Group for the past 2 years, and I will miss being around the work that goes on in the trenches around the lab. I have leaned on many people for all types of guidance through this journey, and would like to thank everyone for their unprecedented support. I have grown as a person and student and will use everything I have learned at this fine establishment I’m sure at one point or another along the great path of life. I must thank my amazing parents, family, friends and of coarse Ashley for putting up with my work ethic throughout my studies; the long days that I would go missing. Without their support none of this would have been possible. I have to specially mention Melanie Wolfe for recommending myself, and ultimately Stu Phillips for presenting this opportunity that is coming to a close. I have had great senior support from Cam Mitchell, Tyler Churchward-Venne, Todd Prior and Michaela Devries in putting this document together, and would not be submitting this without their selfless assistance. It’s been a journey getting to this point, but I wouldn’t change it for the world, to the next chapter in life, cheers and God Bless.</p> / <p>Higher dietary protein intake, greater than the Recommended Dietary Allowance (RDA; 0.8 g protein/kg/d), coupled with resistive exercise has been shown to aid in preservation of muscle mass during hypocaloric diet-induced weight loss. We examined the impact of dietary protein supplementation at two levels (1.2 and 2.4 g/kg/d) on body composition during a 4wk hypocaloric dietary intervention that included 6d/wk of high intensity resistance exercise and interval training. In a single blind study, forty young men consumed 33±1.1 kcal/LBM (~40% reduction versus estimated energy requirements), and were randomly assigned to a group that consumed either 1.2g/kg/d protein or 2.4g/kg/d. Body composition was determined using DXA, Bod Pod, and Bio-impedance pre- and post-intervention to derive a 4-compartment model for body composition. Both groups retained lean mass (LM), but retention was greater in the higher protein group (p</p> / Master of Science (MSc)

Elevated postprandial triacylglycerol concentrations ([TAG]) are associated with the development and progression of atherosclerosis, and are established as an independent risk factor for future cardiovascular disease. Considering the majority of the daytime is spent in a postprandial state typically, and the paediatric origins of atherosclerosis are well established, lifestyle interventions including manipulations of exercise energy expenditure and dietary energy intake should be initiated early in life. Therefore, this thesis aimed to investigate the postprandial metabolic responses to different exercise and energy intake manipulations in boys and girls, with concentrations of circulating TAG representing the primary outcome of interest. To achieve this, a total of 60 healthy 11 to 13 year old boys and girls were recruited into five experimental studies. The first experimental study (Chapter 4) demonstrated that a single session of high-intensity interval running (HIIR) involving 10 x 1 min intervals at 100% maximal aerobic speed (MAS) resulted in a moderate reduction in postprandial plasma [TAG] in 11 to 12 year old boys. In the second experimental study (Chapter 5), immediate replacement of the moderate-intensity exercise-induced energy deficit negated the reduction in postprandial plasma [TAG] in 11 to 13 year old boys. Furthermore, an exercise-induced energy deficit was required to promote an increase in whole-body fat oxidation. The importance of the associated energy deficit was explored further in Chapter 6, which demonstrated that a moderate-intensity exercise-induced energy deficit elicited a greater reduction in postprandial plasma [TAG] than an isoenergetic diet-induced energy deficit in 11 to 13 year old girls (21% vs. 10% respectively). Chapter 7 compared the effect of 10 x 1 min interval runs at 100% MAS (HIIR) and 5 x 1 min interval runs at 100% MAS combined with a mild reduction in habitual energy intake by 0.82 MJ (195 kcal; HIIR-ER) on postprandial metabolism in 11 to 13 year old girls. Acute manipulations of low volume HIIR and ER reduced postprandial plasma [TAG] and increased resting whole-body fat oxidation, with the magnitude of effect marginally, although not meaningfully, greater following HIIR than HIIR-ER. The final experimental chapter (Chapter 8) compared directly healthy 11 to 13 year old boys and girls postprandial TAG responses to acute HIIR. Although postprandial plasma [TAG] was substantially lower in boys compared with girls, the magnitude of reduction following HIIR was similar between the sexes (11% vs. 10% respectively). Collectively, these studies demonstrate the efficacy of acute moderate- and high-intensity exercise, and to a lesser extent energy-intake restriction, to reduce postprandial plasma [TAG] and increase resting whole-body fat oxidation in boys and girls. Furthermore, the beneficial effect of exercise on postprandial metabolism appears dependent on the maintenance of the associated energy deficit. These lifestyle interventions have the potential to provide a practical, effective and engaging stimulus to promote a healthier cardiovascular risk profile in early adolescence.