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https://www.readbyqxmd.com/read/28387576/dietary-micro-periodization-in-elite-female-and-male-runners-and-race-walkers-during-a-block-of-high-intensity-pre-competition-training
#1
Ida Aliisa Heikura, Louise Mary Burke, Antti A Mero, Arja Leena Tuulia Uusitalo, Trent Stellingwerff
We investigated one week of dietary micro-periodization in elite female (n=23) and male (n=15) runners and race-walkers by examining the frequency of training sessions and recovery periods conducted with recommended carbohydrate (CHO) and protein availability. Food and training diaries were recorded in relation to HARD (intense or >90min sessions; KEY) versus RECOVERY days (other-than KEY sessions; EASY). The targets for amount and timing of CHO and protein around KEY sessions were based on current nutrition recommendations...
April 7, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/28338358/a-mismatch-between-athlete-practice-and-current-sports-nutrition-guidelines-among-elite-female-and-male-middle-and-long-distance-athletes
#2
Ida Aliisa Heikura, Trent Stellingwerff, Antti A Mero, Arja Leena Tuulia Uusitalo, Louise Mary Burke
Contemporary nutrition guidelines promote a variety of periodized and time-sensitive recommendations, but current information regarding the knowledge and practice of these strategies among world-class athletes is limited. The aim of this study was to investigate this theme by implementing a questionnaire on dietary periodization practices in national/international level female (n=27) and male (n=21) middle- and long-distance runners/race-walkers. The questionnaire aimed to gain information on between and within-day dietary choices, as well as timing of pre- and post-training meals and practices of training with low or high carbohydrate (CHO) availability...
March 24, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/28208581/macronutrient-intakes-in-553-dutch-elite-and-sub-elite-endurance-team-and-strength-athletes-does-intake-differ-between-sport-disciplines
#3
Floris Wardenaar, Naomi Brinkmans, Ingrid Ceelen, Bo Van Rooij, Marco Mensink, Renger Witkamp, Jeanne De Vries
Web-based 24-h dietary recalls and questionnaires were obtained from 553 Dutch well-trained athletes. The total energy and macronutrient intake was compared between discipline-categories (endurance, team, and strength) within gender, and dietary inadequacy, i.e., too low or high intakes, according to selected recommendations and guidelines, was evaluated by applying a probability approach. On average, 2.83 days per person were reported with a mean energy intake of 2566-2985 kcal and 1997-2457 kcal per day, for men and women, respectively...
February 10, 2017: Nutrients
https://www.readbyqxmd.com/read/27399822/nutrition-and-supplements-for-elite-open-weight-rowing
#4
REVIEW
Susan Boegman, Christine E Dziedzic
Competitive rowing events are raced over 2,000 m requiring athletes to have highly developed aerobic and anaerobic systems. Elite rowers therefore undertake training sessions focused on lactate tolerance, strength and power as well as aerobic and anaerobic capacity development, that can amount to a 24-h training week. The training stimuli and consequent metabolic demands of each session in a rowing training program differ depending on type, length, and intensity. Nutrition guidelines for endurance- and power-based sports should be drawn upon; however, individualized and flexible nutrition plans are critical to successfully meet the daily, weekly, and cyclic nutrient requirements of a rower...
July 2016: Current Sports Medicine Reports
https://www.readbyqxmd.com/read/27264018/use-of-nutritional-supplements-by-danish-elite-athletes-and-fitness-customers
#5
S A Solheim, N B Nordsborg, C Ritz, J Berget, A H Kristensen, J Mørkeberg
The nutritional supplement (NS) industry is one of the fastest growing in the world, and NS use in Denmark is among the highest in Europe. However, the exact use in elite athletes and fitness customers targeted for doping control is unknown. Information from 634 doping control forms obtained in 2014 was evaluated (elite athletes: n = 361; fitness customers: n = 273). The majority of female (92.6%) and male (85.0%) elite athletes and female (100.0%) and male (94.0%) fitness customers declared using one or more NS...
June 5, 2016: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/27176786/many-non-elite-multisport-endurance-athletes-do-not-meet-sports-nutrition-recommendations-for-carbohydrates
#6
Geneviève Masson, Benoît Lamarche
Little is known regarding the dietary intake of non-elite athletes involved in multisport endurance events. The primary objective of this observational study was to characterize the dietary intake of non-elite athletes participating in winter triathlon (snowshoeing, skating, and cross-country skiing), winter pentathlon (winter triathlon sports + cycling and running), Ironman (IM: swimming, cycling, running), and half-distance Ironman (IM 70.3) in relation with current sports nutrition recommendations. A total of 116 non-elite athletes (32 women and 84 men) who had participated in one of those events in 2014 were included in the analyses...
July 2016: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/26731793/case-study-competition-nutrition-intakes-during-the-open-water-swimming-grand-prix-races-in-elite-female-swimmer
#7
Michal Kumstát, Silvie Rybárová, Andy Thomas, Jan Novotný
The nutritional intake of elite open water swimmers during competition is not well established, and therefore this case study aims to provide new insights by describing the feeding strategies adopted by an elite female swimmer (28 yrs; height; 1.71 m; body mass: 60 kg; body fat: 16.0%) in the FINA open water Grand Prix 2014.Seven events of varying distances (15-88 km) and durations (3-12 hrs) were included. In all events, except one, feeds were provided from support boats. Swimmer and support staff were instructed to track in detail all foods and beverages consumed during the events...
August 2016: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/26728966/winning-the-war-against-icu-acquired-weakness-new-innovations-in-nutrition-and-exercise-physiology
#8
Paul E Wischmeyer, Inigo San-Millan
Over the last 10 years we have significantly reduced hospital mortality from sepsis and critical illness. However, the evidence reveals that over the same period we have tripled the number of patients being sent to rehabilitation settings. Further, given that as many as half of the deaths in the first year following ICU admission occur post ICU discharge, it is unclear how many of these patients ever returned home. For those who do survive, the latest data indicate that 50-70% of ICU "survivors" will suffer cognitive impairment and 60-80% of "survivors" will suffer functional impairment or ICU-acquired weakness (ICU-AW)...
2015: Critical Care: the Official Journal of the Critical Care Forum
https://www.readbyqxmd.com/read/25356197/are-we-being-drowned-in-hydration-advice-thirsty-for-more
#9
REVIEW
James David Cotter, Simon N Thornton, Jason Kw Lee, Paul B Laursen
Hydration pertains simplistically to body water volume. Functionally, however, hydration is one aspect of fluid regulation that is far more complex, as it involves the homeostatic regulation of total body fluid volume, composition and distribution. Deliberate or pathological alteration of these regulated factors can be disabling or fatal, whereas they are impacted by exercise and by all environmental stressors (e.g. heat, immersion, gravity) both acutely and chronically. For example, dehydration during exercising and environmental heat stress reduces water volume more than electrolyte content, causing hyperosmotic hypohydration...
2014: Extreme Physiology & Medicine
https://www.readbyqxmd.com/read/25177498/anthropometry-and-dietary-intake-before-and-during-a-competition-in-mountain-runners
#10
Anja Carlsohn, Wolfram Müller
Mountain running is a non-Olympic sport consisting of uphill or up- and downhill races at moderate-to-high altitude. Special nutritional requirements are anticipated, but no nutritional data of mountain runners are available. In three studies, physique of elite and recreational athletes (N = 62), maximum oxygen uptake (N = 3), and prerace and race day dietary intake (N = 6) were measured (mean ± SD). Mean oxygen uptake was 68.7 ± 5.2 mL/kg/min. Energy and carbohydrate intake before a race (29 ± 15 km, 1596 ± 556 m HD) was 3199 ± 701 kcal/d (13...
2014: Journal of Nutrition and Metabolism
https://www.readbyqxmd.com/read/25029703/effect-of-whey-protein-hydrolysate-on-performance-and-recovery-of-top-class-orienteering-runners
#11
RANDOMIZED CONTROLLED TRIAL
Mette Hansen, Jens Bangsbo, Jørgen Jensen, Bo Martin Bibby, Klavs Madsen
This trial aimed to examine the effect of whey protein hydrolysate intake before and after exercise sessions on endurance performance and recovery in elite orienteers during a training camp. Eighteen elite orienteers participated in a randomized controlled intervention trial during a 1-week training camp (13 exercise sessions). Half of the runners (PRO-CHO) ingested a protein drink before (0.3 g kg(-1)) and a protein-carbohydrate drink after (0.3 g protein kg(-1) and 1 g carbohydrate kg(-1)) each exercise session...
April 2015: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/24886256/physiological-assessment-of-olympic-windsurfers
#12
REVIEW
Ioannis Vogiatzis, Giuseppe De Vito
Olympic boardsailing is a very demanding endurance sport activity. The main reason for this phenomenon is ascribable to the fact that elite windsurfers use pumping for propulsion during sailing. Pumping is a manoeuvre in which the athlete pulls the sail rhythmically so that it acts as a wing, thus providing the board with additional forward motion especially in light and moderate wind conditions. It has been demonstrated, by using portable metabolimeters, that Olympic boardsailing (Mistral board and the current Olympic board the Neil Pryde RS:X) entails high energy and cardiorespiratory requirements...
2015: European Journal of Sport Science
https://www.readbyqxmd.com/read/24791917/polyphenol-supplementation-benefits-for-exercise-performance-or-oxidative-stress
#13
REVIEW
Kathryn H Myburgh
Supplement use among athletes is widespread, including non-traditional and biological compounds. Despite increasing research, a comprehensive and critical review on polyphenol supplementation and exercise is still lacking. This review is relevant for researchers directly involved in the topic, as well as those with a broad interest in athletic performance enhancement and sports nutrition. The purpose of this review is to present background information on groups of polyphenols and their derivatives because their differing chemical structures influence mechanisms of action; to discuss the potential of plant, fruit and vegetable-based biological supplements, high in polyphenol content, to affect exercise performance and biomarkers of oxidative stress and exercise-induced muscle damage; and to critically discuss the exercise studies and biomarkers used...
May 2014: Sports Medicine
https://www.readbyqxmd.com/read/24667278/nutritional-recommendations-for-synchronized-swimming
#14
REVIEW
Sherry Robertson, Dan Benardot, Margo Mountjoy
The sport of synchronized swimming is unique, because it combines speed, power, and endurance with precise synchronized movements and high-risk acrobatic maneuvers. Athletes must train and compete while spending a great amount of time underwater, upside down, and without the luxury of easily available oxygen. This review assesses the scientific evidence with respect to the physiological demands, energy expenditure, and body composition in these athletes. The role of appropriate energy requirements and guidelines for carbohydrate, protein, fat, and micronutrients for elite synchronized swimmers are reviewed...
August 2014: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/23579229/contemporary-nutrition-approaches-to-optimize-elite-marathon-performance
#15
REVIEW
Trent Stellingwerff
The professionalization of any sport must include an appreciation for how and where nutrition can positively affect training adaptation and/or competition performance. Furthermore, there is an ever-increasing importance of nutrition in sports that feature very high training volumes and are of a long enough duration that both glycogen and fluid balance can limit performance. Indeed, modern marathon training programs and racing satisfy these criteria and are uniquely suited to benefit from nutritional interventions...
September 2013: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/23432855/changes-in-hydration-status-of-elite-olympic-class-sailors-in-different-climates-and-the-effects-of-different-fluid-replacement-beverages
#16
Evan Jh Lewis, Sarah J Fraser, Scott G Thomas, Greg D Wells
BACKGROUND: Olympic class sailing poses physiological challenges similar to other endurance sports such as cycling or running, with sport specific challenges of limited access to nutrition and hydration during competition. As changes in hydration status can impair sports performance, examining fluid consumption patterns and fluid/electrolyte requirements of Olympic class sailors is necessary to develop specific recommendations for these elite athletes. The purpose of this study was to examine if Olympic class sailors could maintain hydration status with self-regulated fluid consumption in cold conditions and the effect of fixed fluid intake on hydration status in warm conditions...
2013: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/23326093/effects-of-eight-week-supplementation-of-ashwagandha-on-cardiorespiratory-endurance-in-elite-indian-cyclists
#17
Shweta Shenoy, Udesh Chaskar, Jaspal S Sandhu, Madan Mohan Paadhi
BACKGROUND: Cycling is an endurance sport relying mainly on aerobic capacity to provide fuel during long-duration cycling events. Athletes are constantly searching for new methods to improve this capacity through various nutritional and ergogenic aids.s PURPOSE: The aim of the study was to find out the effect of Ashwagandha on the cardiorespiratory endurance capacity, that is, aerobic capacity of elite Indian cyclists. MATERIALS AND METHODS: Forty elite (elite here refers to the participation of the athlete in at least state-level events) Indian cyclists were chosen randomly and were equally divided into experimental and placebo groups...
October 2012: Journal of Ayurveda and Integrative Medicine
https://www.readbyqxmd.com/read/23037196/basal-metabolic-rate-and-body-composition-of-elite-japanese-male-athletes
#18
Takako Koshimizu, Yoshiko Matsushima, Yukari Yokota, Kae Yanagisawa, Satsuki Nagai, Koji Okamura, Yutaka Komatsu, Takashi Kawahara
The estimated energy requirement is important for adequate nutritional management in athletes. The energy requirement can be estimated from the basal metabolic rate (BMR). However, there is little data regarding the BMR of Japanese athletes. This study measured the BMR and body composition of 81 elite Japanese male athletes in different sports categories: endurance (E), strength, power and sprint (S) and ball game (B). The factors influencing the BMR were also investigated. The BMR and body composition were measured by indirect calorimetry and an air-displacement plentysmograph device (the BOD POD), respectively...
2012: Journal of Medical Investigation: JMI
https://www.readbyqxmd.com/read/21294857/use-of-dietary-supplements-in-olympic-athletes-is-decreasing-a-follow-up-study-between-2002-and-2009
#19
Anni Heikkinen, Antti Alaranta, Ilkka Helenius, Tommi Vasankari
BACKGROUND: The aim of this study was to assess the frequency of use of dietary supplements (DS) among large sample of elite Finnish athletes and to describe possible changes in dietary supplement use between the years 2002 and 2009. METHODS: A prospective follow-up study was conducted on Olympic athletes. The first survey was conducted on Olympic athletes in 2002 (N = 446) and the follow-up study was conducted between May 2008 and June 2009 (N = 372). RESULTS: In 2002, a total of 81% of the athletes used dietary supplements (a mean of 3...
2011: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/19403956/dietary-supplement-use-among-elite-young-german-athletes
#20
Hans Braun, Karsten Koehler, Hans Geyer, Jens Kleiner, Joachim Mester, Wilhelm Schanzer
Little is known about the prevalence and motives of supplement use among elite young athletes who compete on national and international levels. Therefore, the current survey was performed to assess information regarding the past and present use of dietary supplements among 164 elite young athletes (16.6 +/- 3.0 years of age). A 5-page questionnaire was designed to assess their past and present (last 4 weeks) use of vitamins, minerals, carbohydrate, protein, and fat supplements; sport drinks; and other ergogenic aids...
February 2009: International Journal of Sport Nutrition and Exercise Metabolism
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