Elevated Soda Consumption in Overweight and At-Risk Elementary Children
by Dr. Yvette Bolen, Dept. Chair
AAHE/RCB Professional Poster Session, Wednesday, April 1, 2009, 1:45 PM - 3:15 PM, Tampa Convention Center: Exhibit Hall NA Poster Session
Bruce Thomas, Yvette M. Bolen and Benjamin Heatherly, Athens State University, Athens, AL, and James Reid, Tampa... more
Bruce Thomas, Yvette M. Bolen and Benjamin Heatherly, Athens State University, Athens, AL, and James Reid, Tampa University, Tampa, FL
Increasingly researchers have investigated the factors associated with the rise in childhood obesity. It is widely accepted that inappropriate nutritional habits coupled with inadequate physical activity practices are associated with the dramatic obesity increase in children over the past three decades, and that chronic health problems persist in obese children. The purpose of this study was to investigate the connection between soda consumption and childhood obesity. Subjects were 221 third grade physical education students. Based on body mass index (BMI) scores, 87 were identified as overweight, 58 were identified as at-risk, and 76 were identified as healthy. A one-way Analaysis of Variance (ANOVA) was utilized to determine differences that exist between these three groups and soda consumption per day. Findings indicated a significant difference in soda consumption, F(2, 218) = 23.127, p<.00l. Results revealed that the mean daily soda consumption score of overweight participants was 2.16, while the mean daily soda consumption score of at-risk and healthy participants was l.22 and .5132, respectively. A crosstabs statistical technique was utilized to further investigate soda consumption (diet, sweetened, or no soda consumed). Of the students identified as overweight, 70 consumed sweetened soda, nine consumed diet soda and eight consumed no sodas. Twenty-four at-risk students consumed sweetened soda, 13 consumed diet soda and 21 consumed no sodas. Of the healthy subjects, nine consumed sweetened soda, 29 consumed diet soda, and 38 consumed no sodas. Therefore 88% of healthy subjects consumed either diet or no sodas, while 80% of the overweight subjects consumed sweetened soda. This study identifies soda consumption in elementary-aged students, particularly sweetened soda, as a key contributor to childhood weight gain. Studies have shown that a child's diet which reduces the intake of beverages absent of nutrients and high in calorie may help lessen or inhibit childhood obesity. This study provides evidence purporting the necessity of children reducing sweetened soda consumption at home, at school, and at any other external functions. It is strongly recommended that any organizations providing services to children, including school systems, should implement changes that effectively reduce children's consumption of sweetened sodas. Care-givers and all adults who supervise the nutritional habits of children must take a proactive approach when making critical beverage selections. It is imperative for adults to recognize that these choices have the potential to determine the health status of the children for whom they are responsible.
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Seen by:Differential impact of nutrition on developmental and metabolic gene expression during fruiting body development in Neurospora crassa
Fungal fruiting body size and form are influenced by the ecology of the species, including diverse environmental... more Fungal fruiting body size and form are influenced by the ecology of the species, including diverse environmental stimuli. Accordingly, nutritional resources available to the fungus during development can be vital to successful production of fruiting bodies. To investigate the effect of nutrition, perithecial development of Neurospora crassa was induced on two different media, a chemically sparsely nutritive Synthetic Crossing Medium (SCM) and a natural Carrot Agar (CA). Protoperithecia were collected before crossing, and perithecia were collected at 2, 24, 48, 72, 96, 120, and at full maturity 144h after crossing. No differences in fruiting body morphology were observed between the two media at any time point. A circuit of microarray hybridizations comparing cDNA from all neighboring stages was performed. For a majority of differentially expressed genes, expression was higher in SCM than in CA, and expression of core metabolic genes was particularly affected. Effects of nutrition were highest in magnitude before crossing, lowering in magnitude during early perithecial development. Interestingly, metabolic effects of the media were also large in magnitude during late perithecial development, at which stage the lower expression in CA presumably reflected the continued intake of diverse complex initial compounds, diminishing the need for expression of anabolic pathways. However, for genes with key regulatory roles in sexual development, including pheromone precursor ccg-4 and poi2, expression patterns were similar between treatments. When possible, a common nutritional environment is ideal for comparing transcriptional profiles between different fungi. Nevertheless, the observed consistency of the developmental program across media, despite considerable metabolic differentiation is reassuring. This result facilitates comparative studies that will require different nutritional resources for sexual development in different fungi.
Carbohydrate supplementation and prolonged intermittent, high-intensity exercise in adolescents: research findings, ethical issues, and suggestions for the future
Shaun M. Phillips
Sports Medicine (In Press)
In the last decade, research has begun to investigate the efficacy of carbohydrate supplementation for improving... more
In the last decade, research has begun to investigate the efficacy of carbohydrate supplementation for improving aspects of physical capacity and skill performance during sport-specific exercise in adolescent team games players. This research remains in its infancy, and further study would be beneficial considering the large youth population actively involved in team games.
Literature on the influence of carbohydrate supplementation on skill performance is scarce, limited to shooting accuracy in adolescent basketball players, and conflicting in its findings. Between-studies differences in the exercise protocol, volume of fluid and carbohydrate consumed, use of prior fatiguing exercise, and timing of skill tests may contribute to the different findings. Conversely, initial data supports carbohydrate supplementation in solution and gel form for improving intermittent endurance running capacity following soccer-specific shuttle-running. These studies produced reliable data, but were subject to limitations including lack of quantification of the metabolic response of participants, limited generalization of data due to narrow participant age and maturation ranges, use of males and females within the same sample, and non-standardized pre-exercise nutritional status between participants.
There is a lack of consensus regarding the influence of frequently consuming carbohydrate-containing products on tooth enamel erosion and development of overweight / obesity in adolescent athletes and non-athletes. These discrepancies mean that the initiation, or exacerbation, of health issues due to frequent consumption of carbohydrate-containing products by adolescents cannot be conclusively refuted. Coupled with the knowledge that consuming a natural, high-carbohydrate diet ~3-8 h before exercise can significantly alter substrate use and improve exercise performance in adults, a moral and ethical concern is raised regarding the direction of future research in order to further knowledge while safeguarding the health and wellbeing of young participants.
It could be deemed unethical to continue study into carbohydrate supplementation while ignoring the potential health concerns and the possibility of generating similar performance enhancements using natural dietary interventions. Therefore, future work should investigate the influence of pre-exercise dietary intake on the prolonged intermittent, high-intensity exercise performance of adolescents. This would enable quantification of whether pre-exercise nutrition can modulate exercise performance, and if so, the optimum dietary composition to achieve this. Research could then combine this knowledge with ingestion of carbohydrate-containing products during exercise to facilitate ethical and healthy nutritional guidelines for enhancing the exercise performance of adolescents.
This article addresses the available evidence regarding carbohydrate supplementation and prolonged intermittent, high-intensity exercise in adolescent team games players. It discusses the potential health concerns associated with frequent use of carbohydrate-containing products by adolescents and how this affects the research ethics of the field, and considers directions for future work.
Optimahl 60plus. Besser essen und leben im Alter. (Optimahl 60plus. Better eating and living in old age)
Co-authored with Dreas, Jessica and Gallois, Katharina Maria. Published in Ernährung & Medizin (Nutrition & Medicine); 2009.
Ingvarsson-Sundström et al: Stable isotope analysis of the Middle Helladic population from two cemeteries at Asine: Barbouna and the East Cemetery
(2009) Ingvarsson-Sundström, A., Richards, M.P. and S. Voutsaki, Stable isotope analysis of the Middle Helladic population from two cemeteries at Asine: Barbouna and the East Cemetery. Journal of Mediterranean Archaeology and Archaeometry 9:2, 1-14.
In this paper we report the results of the stable carbon and nitrogen isotope analyses of humans from two Middle... more
In this paper we report the results of the stable carbon and nitrogen isotope analyses of humans from two Middle Bronze Age cemeteries at Asine, Greece: Barbouna (n=6) and the East Cemetery (n=13). In general, the dietary pattern of adults and juveniles shows a heavy reliance on mainly terrestrial foods; C3 plants and a varying amount of animal protein (meat, milk or dairy products). The high nitrogen values of some individuals
from the East cemetery indicate a substantial consumption of animal protein, although the carbon values show that no detectable amounts of marine foods, or C4 plants such as millet had been consumed. High nitrogen values as well as the high slaughter age of domestic animals, as found in previous studies point towards a significant utilization of milk and dairy products at Asine. A low increase of nitrogen values in subadults younger than one years of age from Barbouna compared to females at the
East cemetery indicates that these children may have been fed breast milk as well as supplementary foods. Therefore, despite the poor preservation and uneven sample size, the Asine isotopic data give us information on diet during the MH period, as well as variation between the members of the community.
KEYWORDS: Stable isotope analysis, Asine, Bronze Age, Middle Helladic, diet, weaning
Catching up from early nutritional deficits? Evidence from rural Ethiopia
Co-authored with Ingo Outes. Accepted at Journal of Economics and Human Biology.
We examine the nutritional status of a cohort of poor Ethiopian children and their patterns of catch-up growth in... more We examine the nutritional status of a cohort of poor Ethiopian children and their patterns of catch-up growth in height-for-age between three key development stages: age one, five and eight. We use ordinary least squares (within community) and instrumental variables analysis. During the earliest period, we find that nutritional catch-up patterns vary substantially across socioeconomic groups: average catch-up growth in height-for-age is almost perfect among children in relatively better-off households, while among the poorer children, relative height is more persistent. Between five and eight years of age, however, we find near-perfect persistence and no evidence of heterogeneity in catch-up growth. Our findings suggest that household wealth, and in particular access to services, can lead to substantial catch-up growth early on in life. However, for our sample, the window of opportunity to catch up appears to close as early as the age of five.
Ingesting a 6% carbohydrate-electrolyte solution improves endurance capacity, but not sprint performance, during intermittent, high-intensity shuttle running in adolescent team games players aged 12 – 14 years
Shaun M. Phillips, Anthony P. Turner, Shirley Gray, Mark F. Sanderson & John Sproule
European Journal of Applied Physiology (2010) 108: 811-821.
The main aim of this study was to investigate the influence of consuming a 6% carbohydrate-electrolyte (CHO-E)... more The main aim of this study was to investigate the influence of consuming a 6% carbohydrate-electrolyte (CHO-E) solution on the intermittent, high-intensity endurance performance and capacity of adolescent team games players. Fifteen participants (mean age 12.7 ± 0.8 years) performed two trials separated by 3-7 days. In each trial, they completed 60 min of exercise composed of four 15 min periods of part A of the Loughborough Intermittent Shuttle Test, followed by an intermittent run to exhaustion (part B). In a double-blind, randomised, counterbalanced fashion participants consumed either the 6% CHO-E solution or a non-carbohydrate (CHO) placebo (5 ml.kg-1 BM) during the 5 min pre-trial and after each 15 min period of part A (2 ml.kg-1 BM). Time to fatigue was increased by 24.4% during part B when CHO was ingested (5.1 ± 1.8 vs. 4.1 ± 1.6 min, P < 0.05), with distance covered in part B also significantly greater in the CHO trial (851 ± 365 vs. 694 ± 278 m, P < 0.05). No significant between-trials differences were observed for mean 15 m sprint time (P = 0.35), peak sprint time (P = 0.77), or heart rate (P = 0.08) during part A. These results demonstrate, for the first time, that ingestion of a CHO-E solution significantly improves the intermittent, high-intensity endurance running capacity of adolescent team games players during an exercise protocol designed to simulate the physiological demands of team games.
Carbohydrate Ingestion During Team Games Exercise: Current Knowledge and Areas for Future Investigation
Shaun M. Phillips, John Sproule & Anthony P. Turner
Sports Medicine (2011) 41 (7): 559-585.
There is a growing body of research on the influence of ingesting carbohydrate-electrolyte (CHO-E) solutions... more There is a growing body of research on the influence of ingesting carbohydrate-electrolyte (CHO-E) solutions immediately prior to and during prolonged intermittent, high-intensity exercise (team games exercise) designed to replicate field-based team games. This review presents the current body of knowledge in this area, and identifies avenues of further research. Almost all early work supported the ingestion of CHO-E solutions during prolonged intermittent exercise, but was subject to methodological limitations. A key concern was the use of exercise protocols characterised by prolonged periods at the same exercise intensity, the lack of maximal or high-intensity work components, and long periods of seated recovery, that failed to replicate the activity pattern or physiological demand of team games exercise. The advent of protocols specifically designed to replicate the demands of field-based team games enabled a more externally valid assessment of the influence of carbohydrate (CHO) ingestion during this form of exercise. Once again, the research overwhelmingly supports CHO ingestion immediately prior to and during team games exercise for improving time to exhaustion during intermittent running. While the external validity of exhaustive exercise at fixed prescribed intensities as an assessment of exercise capacity during team games may appear questionable, these assessments should perhaps not be viewed as exhaustive exercise tests per se but as indicators of the ability to maintain high-intensity exercise, which is a recognised marker of performance and fatigue during field-based team games. Possible mechanisms of enhancement include sparing of muscle glycogen, glycogen resynthesis during low-intensity exercise periods, and attenuated effort perception during exercise. Most research fails to show improvements in sprint performance during team games exercise with CHO ingestion, perhaps due to the lack of influence of CHO on sprint performance when endogenous muscle glycogen concentration remains above a critical threshold of ~200 mmol/kg dry weight. Despite the increasing number of publications in this area, few studies have attempted to drive the research base forwards by investigating potential modulators of CHO efficacy during team games exercise, preventing the formulation of optimal CHO intake guidelines. Potential modulators may be different to those during prolonged steady-state exercise due to the constantly changing exercise intensity and frequency, duration and intensity of rest intervals, the potential for team games exercise to slow the rate of gastric emptying, and restricted access to CHO-E solutions during many team games. This review has highlighted fluid volume, CHO concentration, CHO composition and solution osmolality; glycaemic index of pre-exercise meals; fluid and CHO ingestion patterns; fluid temperature; CHO mouthwashes; CHO supplementation in different ambient temperatures; and investigation of all of these areas in different subject populations as important avenues for future research to enable a more comprehensive understanding of CHO ingestion during team games exercise.
Beverage carbohydrate concentration influences the intermittent endurance capacity of adolescent team games players during prolonged intermittent running
Shaun M. Phillips, Anthony P. Turner, Mark F. Sanderson & John Sproule
European Journal of Applied Physiology (2012) 112 (3): 1107-1116
This study investigated the influence of consuming a 2, 6, and 10% carbohydrate-electrolyte (CHO-E) solution on the... more This study investigated the influence of consuming a 2, 6, and 10% carbohydrate-electrolyte (CHO-E) solution on the intermittent endurance capacity and sprint performance of adolescent team games players. Seven participants (five males and two females; mean age 13.3 ± 0.5 years, height 1.71 ± 0.05 m, body mass (BM) 62.0 ± 6.3 kg) performed three trials separated by 3 to 7 days. In each trial, they completed four 15 min periods of part A of the Loughborough Intermittent Shuttle Test (LIST) followed by an intermittent run to exhaustion (part B). Participants consumed 5 ml.kg-1 BM of the solution during the 5 min pre-exercise period, and a further 2 ml.kg-1 BM every 15 min during part A of the LIST. Intermittent endurance capacity increased by 34% with ingestion of the 6% CHO-E solution compared with the 10% solution (5.5 ± 0.8 vs. 4.1 ± 1.5 min, P < 0.05), equating to a distance of 931 ± 172 vs. 706 ± 272 m (P < 0.05). There was no significant difference between the 2% (4.8 ± 1.2 min) and 6% (P = 0.10) or the 2% and 10% solutions (P = 0.09). Carbohydrate concentration did not significantly influence mean 15 m sprint time (P = 0.38). These results suggest that the carbohydrate concentration of an ingested solution influences the intermittent endurance capacity of adolescent team games players with a 6% solution significantly more effective than a 10% solution.
Carbohydrate gel ingestion significantly improves the intermittent endurance capacity, but not sprint performance, of adolescent team games players during a simulated team games protocol
Shaun M. Phillips, Anthony P. Turner, Mark F. Sanderson & John Sproule
European Journal of Applied Physiology (2012) 112 (3): 1133-1141
The aim of this study was to investigate the influence of ingesting a carbohydrate (CHO) gel on the intermittent... more The aim of this study was to investigate the influence of ingesting a carbohydrate (CHO) gel on the intermittent endurance capacity and sprint performance of adolescent team games players. Eleven participants (mean age 13.5 ± 0.7 years, height 1.72 ± 0.08 m, body mass (BM) 62.1 ± 9.4 kg) performed two trials separated by 3-7 days. In each trial, they completed four 15 min periods of part A of the Loughborough Intermittent Shuttle Test, followed by an intermittent run to exhaustion (part B). In the 5 min pre-exercise, participants consumed 0.818 ml.kg-1 BM of a CHO or a non-CHO placebo gel, and a further 0.327 ml.kg-1 BM every 15 min during part A of the LIST (38.0 ± 5.5 g CHO.h-1 in the CHO trial). Intermittent endurance capacity was increased by 21.1% during part B when the CHO gel was ingested (4.6 ± 2.0 vs. 3.8 ± 2.4 min, P < 0.05, r = 0.67), with distance covered in part B significantly greater in the CHO trial (787 ± 319 vs. 669 ± 424 m, P < 0.05, r = 0.57). Gel ingestion did not significantly influence mean 15 m sprint time (P = 0.34), peak sprint time (P = 0.81), or heart rate (P = 0.66). Ingestion of a CHO gel significantly increases the intermittent endurance capacity of adolescent team games players during a simulated team games protocol.
Associations of polyunsaturated fatty acids with residual depression or anxiety in older people with major depression.
Jadoon A, Chiu CC, McDermott L, Cunningham P, Frangou S, Chang CJ, Sun IW, Liu SI, Lu ML, Su KP, Huang SY, Stewart R.
J Affect Disord. 2011 http://dx.doi.org/10.1016/j.jad.2011.09.007
BACKGROUND: Depression in late life often follows a chronic course with residual depressive and anxiety symptoms.... more
BACKGROUND: Depression in late life often follows a chronic course with residual depressive and anxiety symptoms. Levels of omega-3 polyunsaturated fatty acids (PUFAs) have been found to be depleted in people with major depression in the acute stage. Additionally, lower omega-3 PUFA levels have been suggested to be associated with anxiety. The aim of this study was to investigate whether PUFAs levels (omega-3 or omega-6) are correlated with residual depressive or anxiety symptoms in older people with previous depression.
METHODS: Participants aged 60years or over with previous major depression in remission were enrolled from outpatient psychiatric services of four hospitals. Participants with residual depressive symptoms were defined as the Hamilton Depression Rating Scale (HDRS) scores >5, and those with anxiety were defined as sum of scores for the two anxiety subscale of HDRS≧2. The levels of fatty acids in erythrocyte membranes and in plasma were measured separately by gas chromatography.
RESULTS: One hundred and thirty two older people with previous major depression (mean age of 68years, range 60-86years) were analyzed. Erythrocyte membrane linoleic acid levels had a curvilinear association with depressive symptoms and anxiety symptoms. Plasma linoleic acid levels were found to have a negative linear relationship with depressive symptoms. No significant associations were found between any omega-3 fatty acid level and depressive or anxiety symptoms.
CONCLUSION: Linoleic acid levels may be a possible biomarker for residual depression and anxiety in older people with previous depression. Possible clinical applications need further investigation.
Anthropometry, Physical Anthropology, and the Reconstruction of Ancient Health, Nutrition, and Living Standards
Historia, Vol. LIV, 2005, pp. 68-83

