assesses the quality of food consumed using tools such as quality indexes. In previous decades, several tools for assessing diet quality have been developed based on dietary guidelines to direct food choices or to develop nutritional education activities. Among them, for instance, the Healthy Eating Index
Daniel P. Joaquim, Claudia R. Juzwiak and Ciro Winckler
Colleen McConnell, Alyssa McPherson and Kathleen Woolf
). Proper nutrition may also play an important role in prevention and recovery of marching band injuries. To date, only one study has examined diet quality of marching artists. Sharma et al. ( 2008 ) assessed cardiovascular disease risk factors, including a diet quality questionnaire, among a university
Gabrielle M. Turner-McGrievy, Wendy J. Moore and Daheia Barr-Anderson
This study examined differences in diet, particularly vegetarian and vegan, among ultramarathon and other long distance runners. Participants who had completed a half- (HALF), full- (FULL), or ultramarathon (ULTRA) in the past 12 months were recruited to complete an online survey assessing current diet, reason for diet, and other dietary behaviors. A total of 422 participants completed the survey (n = 125 ULTRA, n = 152 FULL, n = 145 HALF). More ULTRA participants were men (63%) (vs. FULL (37%) and HALF (23%)) and ULTRA participants reported significantly more years of running (16.2 ± 13.6) than FULL (12.1 ± 11.1, p < .05) or HALF (10.6 ± 11.6, p < .05). Body mass index (self-reported height/weight) was significantly higher in HALF (24.3 ± 4.4 kg/m2) vs. FULL (23.1 ± 3.2 kg/m2, p < .05). ULTRA runners were almost twice as likely to report following a vegan/vegetarian diet than HALF and FULL marathoners combined (B = 1.94, 95% CI = 1.08, 3.48) and reported following their current diet longer (13.7 ± 15.3 years) than HALF participants (8.6 ± 12.1 years, p = .01). ULTRA participants more commonly cited environmental concerns whereas HALF and FULL participants cited weight loss or maintenance as a reason for following their current diet. There was no difference in diet quality between ULTRA and other runners but vegan and vegetarian runners had higher diet quality scores than nonvegetarian runners (p < .001). The findings point to an interconnectedness between long distance running, diet, and diet choice and can help guide nutrition, exercise, and psychology professionals who are working with distance runners.
Anita Durksen, Shauna Downs, Rebecca Mollard, Laura Forbes, Geoff D.C. Ball and Jon McGavock
Physical activity interventions targeting weight status have yielded mixed results. This variability may be attributed to compensatory changes in dietary patterns after increasing physical activity (PA) levels. Therefore, we sought to determine whether dietary patterns varied with time spent in vigorous-intensity PA in youth.
Cross-sectional analysis of 330 youth enrolled in a school-based prospective cohort in central Alberta. Physical activity was assessed with waist mounted accelerometers (Actical) worn for 7 days. Main outcomes included consumption of unhealthy foods and the unhealthy food index obtained from a validated web-based 24-hour dietary recall instrument. Secondary outcomes included macronutrient intake, food group (Canada’s Food Guide to Healthy Eating) intake, and diet quality.
Compared with youth participating in < 7 min/ day of vigorous physical activity, those achieving ≥ 7 min/day displayed no change in healthy or unhealthy food consumption. However, linear regression suggests a modest association between diet quality and vigorous-intensity PA.
These data demonstrate that in this cohort of Canadian youth, time spent being physically active is associated with healthier dietary patterns and not with increased consumption of unhealthy foods.
Louise Capling, Janelle A. Gifford, Kathryn L. Beck, Victoria M. Flood, Gary J. Slater, Gareth S. Denyer and Helen T. O’Connor
increase the risk of illness or injury ( Thomas et al., 2016 ), valid, cost-effective, and logistically feasible ways of evaluating the dietary intake of athletes are warranted. Increasingly, nutritional epidemiology has shifted focus from single nutrients toward evaluating the whole diet or diet quality
Krystle E. Zuniga, Darcy L. Downey, Ryan McCluskey and Carley Rivers
The majority of National Collegiate Athletic Association (NCAA) programs do not have a sports nutritionist, leaving athletes to gather information from resources that vary in reputability. The objective of this study was to identify a need for the development of accessible and reputable resources of nutrition information by assessing the current use of nutrition information resources, dietary habits, and sports nutrition knowledge among Division I collegiate athletes. Seventy-two athletes across eight sports completed questionnaires concerning nutrition resources used, dietary habits, and sports nutrition knowledge. In addition, interest levels in a mobile device application for delivery of nutrition information and tools were assessed. Primary sources for nutrition information included parents and family, athletic trainers (AT), and the internet/media, and athletes felt most comfortable discussing nutrition with parents and family, ATs, and strength and conditioning specialists. Performance on a sports nutrition knowledge questionnaire indicated a general lack of nutrition knowledge, and the high frequency of “unsure” responses suggested a lack of confidence in nutrition knowledge. Athletes conveyed a high likelihood that they would use a mobile device application as a nutrition resource, but were more interested in access to nutrition topics than tools such as a food log. We found that college athletes possess minimal sports nutrition knowledge, obtain nutrition information from nonprofessional resources, and were interested in utilizing a mobile device application as a resource. Further research is needed to explore the feasibility and effectiveness of alternative resources, such as a mobile device application, to deliver nutrition information and improve nutrition knowledge.
William R. Leonard
This paper examines the evolutionary origins of human dietary and activity patterns, and their implications for understanding modern health problems. Humans have evolved distinctive nutritional characteristics associated the high metabolic costs of our large brains. The evolution of larger hominid brain size necessitated the adoption of foraging strategies that both provided high quality foods, and required larger ranges and activity budgets. Over time, human subsistence strategies have become ever more efficient in obtaining energy with minimal time and effort. Today, populations of the industrialized world live in environments characterized by low levels of energy expenditure and abundant food supplies contributing to growing rates of obesity. Analyses of trends in dietary intake and body weight in the US over the last 50 years indicate that the dramatic rise in obesity cannot be explained solely by increased energy consumption. Rather, declines in activity are also important. Further, we find that recent recommendations on physical activity have the potential to bring daily energy expenditure levels of industrialized societies surprisingly close to those observed among subsistence-level populations. These findings highlight the importance of physical activity in promoting nutritional health and show the utility of evolutionary approaches for developing public health recommendations.
Inge Spronk, Susan E. Heaney, Tania Prvan and Helen T. O’Connor
This study investigated the association between general nutrition knowledge and dietary quality in a convenience sample of athletes (> state level) recruited from four Australian State Sport Institutes. General nutrition knowledge was measured by the validated General Nutrition Knowledge Questionnaire and diet quality by an adapted version of the Australian Recommended Food Score (A-ARFS) calculated from food frequency questionnaire data. Analysis of variance and linear modeling were used to assess relationships between variables. Data: mean (Standard Deviation). A total of 101 athletes (Males: 37; Females: 64), 18.6 (4.6) years were recruited mainly from team sports (72.0%). Females scored higher than males for both nutrition knowledge (Females: 59.9%; Males: 55.6%; p = .017) and total A-ARFS (Females: 54.2% Males: 49.4%; p = .016). There was no significant influence of age, level of education, athletic caliber or team/individual sport participation on nutrition knowledge or total A-ARFS. However, athletes engaged in previous dietetic consultation had significantly higher nutrition knowledge (61.6% vs. 56.6%; p = .034) but not total A-ARFS (53.6% vs. 52.0%; p = .466). Nutrition knowledge was weakly but positively associated with total A-ARFS (r = .261, p= .008) and A-ARFS vegetable subgroup (r = .252, p = .024) independently explaining 6.8% and 5.1% of the variance respectively. Gender independently explained 5.6% of the variance in nutrition knowledge (p = .017) and 6.7% in total A-ARFS (p = .016). Higher nutrition knowledge and female gender were weakly but positively associated with better diet quality. Given the importance of nutrition to health and optimal sports performance, intervention to improve nutrition knowledge and healthy eating is recommended, especially for young male athletes.
Jennifer M. Sacheck, Helen M. Rasmussen, Meghan M. Hall, Tamar Kafka, Jeffrey B. Blumberg and Christina D. Economos
To investigate the association between pregame snacks varying in macronutrient content and exercise intensity, physiological stress, and fatigue in young soccer players. One hour before a 50-min soccer game, children (n = 79; 9.1 ± 0.8 y) were randomly assigned to consume a raisin-, peanut-butter-, or cereal-based snack. Body mass index, blood glucose, and salivary measures of stress (cortisol and immunoglobulin A-IgA) were measured pre- and post-game. Exercise intensity was measured by accelerometry. Self-administered questionnaires were used to assess diet quality and fatigue. Analysis of covariance was used to examine the relationship between pregame snacks and biochemical outcomes. Postgame glucose and cortisol increased [12.9 ± 21.3 mg/dL (p < .001) and 0.04 ± 0.10 μg/dL (p < .05), respectively] and IgA decreased −2.3 ± 9.6 μg/mL; p < .001) from pregame values. The pregame snack was not associated with exercise intensity or post-game outcome; however, children consuming the cereal-based (high-sugar and high-glycemic index (GI)) snack exercised more intensely than the 2 lower-GI snack groups (p < .05). Children who consumed the high-sugar, high-GI snack also reported more symptoms of fatigue (p < .05). A high-sugar, high-GI pregame snack was associated with exercise intensity and fatigue but not changes in blood sugar or stress biomarkers following a soccer game in children.
Nessan Costello, Jim McKenna, Louise Sutton, Kevin Deighton and Ben Jones
Designing and implementing successful dietary intervention is integral to the role of sport nutrition professionals as they attempt to positively change the dietary behavior of athletes. High-performance sport is a time-pressured environment where immediate results can often supersede pursuit of the most effective evidence-based practice. However, efficacious dietary intervention necessitates comprehensive, systematic, and theoretical behavioral design and implementation, if the habitual dietary behaviors of athletes are to be positively changed. Therefore, this case study demonstrates how the Behaviour Change Wheel was used to design and implement an effective nutritional intervention within a professional rugby league. The eight-step intervention targeted athlete consumption of a high-quality dietary intake of 25.1 MJ each day to achieve an overall body mass increase of 5 kg across a 12-week intervention period. The capability, opportunity, motivation, and behavior model and affordability, practicability, effectiveness/cost-effectiveness, acceptability, safety, and equity criteria were used to identify population-specific intervention functions, policy categories, behavior change techniques, and modes of intervention delivery. The resulting intervention was successful, increasing the average daily energy intake of the athlete to 24.5 MJ, which corresponded in a 6.2 kg body mass gain. Despite consuming 0.6 MJ less per day than targeted, secondary outcome measures of diet quality, strength, body composition, and immune function all substantially improved, supporting sufficient energy intake and the overall efficacy of a behavioral approach. Ultimately, the Behaviour Change Wheel provides sport nutrition professionals with an effective and practical stepwise method to design and implement effective nutritional interventions for use within high-performance sport.