A Mismatch Between Athlete Practice and Current Sports Nutrition Guidelines Among Elite Female and Male Middle- and Long-Distance Athletes

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 posttraining meals and practices of training with low or high carbohydrate (CHO) availability. Data are shown as percentage (%) of all athletes, with differences in responses between subgroups (sex or event) shown as Chi-square x2 when p < .05. Nearly two-thirds of all athletes reported that they aim to eat more food on, or after, hard training days. Most athletes said they focus on adequate fueling (96%) and adequate CHO and protein (PRO) recovery (87%) around key sessions. Twenty-six percent of athletes (11% of middle vs 42% of long-distance athletes [x2 (1, n = 46) = 4.308, p = .038, phi = 0.3])) reported to undertake training in the fasted state, while 11% said they periodically restrict CHO intake, with 30% ingesting CHO during training sessions. Our findings show that elite endurance athletes appear to execute pre- and post-key session nutrition recovery recommendations. However, very few athletes deliberately undertake some contemporary dietary periodization approaches, such as training in the fasted state or periodically restricting CHO intake. This study suggests mismatches between athlete practice and current and developing sports nutrition guidelines.

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OR-025 Association study between Chinese excellent long-distance female athletes’ PGC-1β genetic polymorphism and aerobic capacity

Exercise Biochemistry Review ◽

10.14428/ebr.v1i2.9263 ◽

2018 ◽

Vol 1 (2) ◽

Author(s):

Jie Jia ◽

Chunyan Xu

Keyword(s):

Lung Function ◽

Aerobic Exercise ◽

Exercise Capacity ◽

Anaerobic Threshold ◽

Endurance Athletes ◽

Distance Runners ◽

Long Distance ◽

Relative Value ◽

Significant Difference ◽

Aerobic Exercise Capacity

Objective Peroxisome proliferator-activated receptor-γ coactivator-1β (PGC-1β) is mainly expressed in mitochondria-rich tissues, which involved in skeletal muscle mitochondrial biosynthesis and energy metabolism processes such as fatty acid transport and oxidation, hepatic gluconeogenesis. PGC-1β is Previous studies have shown that this genetic polymorphism is associated with the athletic ability of elite endurance athletes. Therefore, based on the previous research, the relationship between PGC-1β gene polymorphism and aerobic exercise ability of elite female long-distance runners was discussed to provide new effective indicators for athletes' selection of materials, and improve the accuracy and advancement of athletes' selection of materials. Methods 56 Chinese elite female long-distance runners were selected, and venous blood was extracted to analyze the gene polymorphism of specific gene locus. The subjects were tested for aerobic endurance index and lung function index, wherein the aerobic endurance index included maximum oxygen uptake, relative maximal oxygen uptake relative value, anaerobic threshold and anaerobic threshold relative value, and lung function indicators including vital capacity, Time lung capacity, minute ventilation and maximum ventilation . Subsequently, the cross-sectional association study method was used to analyze the association between four genotypes locus of PGC-1β including rs32579, rs2161257, rs1544744 and rs10783180 in 56 subjects. Results 1) All four polymorphic locus were tested by H-W balance, indicating that the subjects were representative of the population. 2) rs32579 locus: There were no significant differences in lung function indicators and aerobic exercise capacity between different genotype athletes. 3) rs2161257 locus: There were no significant differences in lung function indicators and aerobic exercise capacity between different genotype athletes. 4) rs1544744 locus: There were no significant differences in lung function indicators and aerobic exercise capacity between different genotype athletes. 5) rs10783180 locus: There is a significant difference in the relative values of anaerobic threshold and anaerobic threshold between different genotype athletes. The anaerobic threshold of AG genotype athletes was 2156.35±227.69 ml/min and the anaerobic threshold of athletes with GG genotype was 2143.41±217.30 ml/min. So the anaerobic threshold of AG genotype athletes was significantly greater than the anaerobic threshold of GG genotype athletes. The Anaerobic threshold relative value for AG genotype athletes was 50.99±3.99 ml/kg/min, while the anaerobic threshold relative value for athletes with GG genotype was 48.12±4.25 ml/kg/min. The anaerobic threshold relative value of AG genotype athletes was significantly greater than that of GG genotype athletes Other indicators showed no significant difference. Conclusions The rs10783180 polymorphism is associated with the athletic ability of elite endurance athletes. The population carrying AG genotype may have higher anaerobic threshold value and relative value of anaerobic threshold, which may become more excellent endurance athletes. Rs10783180 polymorphic locus AG genotype can be used as a molecular genetic marker to predict the relative value of anaerobic threshold and anaerobic threshold of Chinese Han women's long-distance runners in northern China.

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Dependence of reactions of the external respiratory system in athletes on the orientation of the training process

Pathologia ◽

10.14739/2310-1237.2021.1.228920 ◽

2021 ◽

Vol 18 (1) ◽

pp. 103-111

Author(s):

S. M. Kanyhina ◽

M. S. Potapenko ◽

L. O. Kurilets

Keyword(s):

Respiratory System ◽

Forced Vital Capacity ◽

Vital Capacity ◽

Endurance Athletes ◽

External Respiration ◽

Distance Runners ◽

Training Process ◽

Long Distance ◽

Respiratory Volume

Issues of improving the functional training (different orientation of the training process) of athletes due the development of the respiratory system, including the respiratory system, as well as increasing the body's resistance to hypoxic stress remain extremely relevant at the present stage of sport development. The aim of the study is to investigate the peculiarities of the reaction of the external respiratory system in athletes, depending on the orientation of the training process. Materials and methods. The study involved 104 athletes (84 men and 20 women) skill level from CMS to IMS: 63 – athletes, who developed mainly endurance quality (triathletes, swimmers, long-distance runners, rowing), 31 – strength quality (weightlifters, powerlifting, weightlifting), 10 – speed quality (runners sprinters). The mean age of the athletes under study was 21.75 ± 3.32 years. Among them there are international masters of sports (IMS) – 2 athletes, masters of sports (MS) – 25, candidates for master of sports – 48, athletes of 1 degree – 29. Computer spirometric examination was performed for all athletes using the spirographic complex “Spirocom” produced by LLC “KHAI-Medica” in Kharkiv in accordance with existing recommendations. Research results. Analysis of computer spirometry showed, that athletes, who developed the quality of strength had 18.2 % (P = 0.014) greater vital capacity of the lungs, due to the predominance of respiratory volume by 29.9 % (P = 0.017) and by 42.1 % (P = 0.001) inspiratory reserve volume, but less by 22.4 % (P = 0.019) expiratory reserve volume, than athletes, who improved the quality of endurance. Athletes, who developed the quality of endurance in contrast to athletes, who improved the quality of speed had a higher forced vital capacity of the lungs by 14.9 % (P = 0.031), due to the predominance of a inspiratory reserve volume by 9.8 % (P = 0.049) and expiratory reserve volume by 28.5 % (P = 0.044). Athletes, who improved the quality of speed had lower vital capacity of the lungs by 26.1 % (P = 0.003), forced vital capacity of the lungs by 20.2 % (P = 0.016), due to a decrease of inspiratory reserve volume by 34.2 % (P = 0.008), than athletes, who improved the quality of strength. Athletes, who developed the quality of speed, had greater resistance to air flow in the bronchi of small caliber in the exhalation phase, as evidenced by a lower rate of forced expiratory volume1 by 21.1 % (P = 0.015), the volume of forced expiratory to reach the peak expiratory flow by 30.2 % (P = 0.016), MEF 75 by 22.9 % (P = 0.036), FEF 75–85 by 22.8 % (P = 0.035), than athletes, who developed the quality of strength. Conclusions Athletes, who have developed a quality of strength have a greater vital capacity of the lungs, due to the predominance of respiratory volume and inspiratory reserve volume, but less expiratory reserve volume, than in athletes, who improved the quality of endurance. Athletes, who developed endurance quality, in contrast to athletes, who improved the quality of speed, have a higher forced vital capacity of the lungs, due to the predominance of inspiratory and expiratory reserve volumes. The function of external respiration of athletes, who improved the quality of speed is characterized by lower vital capacity of the lungs, forced vital capacity of the lungs, due to reduced inspiratory reserve volume, and greater resistance to airflow in the bronchi of small caliber in the expiratory phase, than in athletes, who developed the quality of strength.

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Physique characteristics of world-class African long distance runners

African Journal for Physical Health Education Recreation and Dance ◽

10.4314/ajpherd.v11i1.24680 ◽

2005 ◽

Vol 11 (1) ◽

Author(s):

Colette Underhay ◽

J Hans De Ridder ◽

LO Amusa ◽

AL Toriola ◽

AP Agbonjinmi ◽

...

Keyword(s):

Distance Runners ◽

Long Distance ◽

World Class

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Crossing the Golden Training Divide: The Science and Practice of Training World-Class 800- and 1500-m Runners

Sports Medicine ◽

10.1007/s40279-021-01481-2 ◽

2021 ◽

Author(s):

Thomas Haugen ◽

Øyvind Sandbakk ◽

Eystein Enoksen ◽

Stephen Seiler ◽

Espen Tønnessen

Keyword(s):

Best Practice ◽

Lactate Production ◽

Position Statement ◽

Training And Development ◽

Plyometric Training ◽

Distance Runners ◽

Long Distance ◽

Distance Training ◽

World Class ◽

Training Methodologies

AbstractDespite an increasing amount of research devoted to middle-distance training (herein the 800 and 1500 m events), information regarding the training methodologies of world-class runners is limited. Therefore, the objective of this review was to integrate scientific and best practice literature and outline a novel framework for understanding the training and development of elite middle-distance performance. Herein, we describe how well-known training principles and fundamental training characteristics are applied by world-leading middle-distance coaches and athletes to meet the physiological and neuromuscular demands of 800 and 1500 m. Large diversities in physiological profiles and training emerge among middle-distance runners, justifying a categorization into types across a continuum (400–800 m types, 800 m specialists, 800–1500 m types, 1500 m specialists and 1500–5000 m types). Larger running volumes (120–170 vs. 50–120 km·week−1 during the preparation period) and higher aerobic/anaerobic training distribution (90/10 vs. 60/40% of the annual running sessions below vs. at or above anaerobic threshold) distinguish 1500- and 800-m runners. Lactate tolerance and lactate production training are regularly included interval sessions by middle-distance runners, particularly among 800-m athletes. In addition, 800-m runners perform more strength, power and plyometric training than 1500-m runners. Although the literature is biased towards men and “long-distance thinking,” this review provides a point of departure for scientists and practitioners to further explore and quantify the training and development of elite 800- and 1500-m running performance and serves as a position statement for outlining current state-of-the-art middle-distance training recommendations.

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Dietary Microperiodization in Elite Female and Male Runners and Race Walkers During a Block of High Intensity Precompetition Training

International Journal of Sport Nutrition and Exercise Metabolism ◽

10.1123/ijsnem.2016-0317 ◽

2017 ◽

Vol 27 (4) ◽

pp. 297-304 ◽

Cited By ~ 8

Author(s):

Ida A. Heikura ◽

Louise M. Burke ◽

Antti A. Mero ◽

Arja Leena Tuulia Uusitalo ◽

Trent Stellingwerff

Keyword(s):

High Intensity ◽

Protein Intake ◽

Female Athletes ◽

Sports Nutrition ◽

Endurance Athletes ◽

Eating Patterns ◽

Training Volume ◽

Nutrition Guidelines ◽

Daily Energy ◽

And Training

We investigated one week of dietary microperiodization 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. Relative daily energy and CHO intake was significantly (p < .05) higher in males (224 ± 26 kJ/kg/d, 7.3 ± 1.4 g/kg/d CHO) than females (204 ± 29 kJ/kg/d, 6.2 ± 1.1 g/kg/d CHO) on HARD days. However, when adjusted for training volume (km), there was no sex-based difference in CHO intake daily (HARD: 0.42 ± 0.14 vs 0.39 ± 0.15 g/kg/km). Females appeared to periodize energy and protein intake with greater intakes on HARD training days (204 ± 29 vs 187 ± 35 kJ/kg/d, p = .004; 2.0 ± 0.3 vs 1.9 ± 0.3 g/kg/d protein, p = .013), while males did not periodize intakes. Females showed a pattern of periodization of postexercise CHO for KEY vs EASY (0.9 ± 0.4 vs 0.5 ± 0.3 g/kg; p < .05) while males had higher intakes but only modest periodization (1.3 ± 0.9 vs 1.0 ± 0.4; p = .32). There was only modest evidence from female athletes of systematic microperiodization of eating patterns to meet contemporary sports nutrition guidelines. While this pattern of periodization was absent in males, in general they consumed more energy and CHO daily and around training sessions compared with females. Elite endurance athletes do not seem to systematically follow the most recent sports nutrition guidelines of periodized nutrition.

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The legend of plantar neuropraxia in long-distance athletes

South African Journal of Sports Medicine ◽

10.17159/2078-516x/2013/v25i2a378 ◽

2013 ◽

Vol 25 (2) ◽

pp. 51

Author(s):

DS Kellogg ◽

J Joslin

Keyword(s):

Tuning Fork ◽

Endurance Athletes ◽

Foot Pain ◽

Distance Runners ◽

Long Distance ◽

Sensory Deficits ◽

Long Distance Running ◽

Adult Participants ◽

Before And After ◽

Neurosensory Testing

Background. Legend has it that endurance athletes who develop plantar foot pain during long-distance running frequently experience an eventual relief of pain due to a transient neuropraxia brought on by continued activity.Objective. To evaluate the nature of this legend, we assessed long-distance runners for the presence of sensory deficits before and after completion of an ultramarathon, expecting to find an induced neuropraxia and abnormal sensory results.Methods. Twenty-five adult participants of an ultramarathon were evaluated prior to their 50/100 km run and again upon completion of the race. Neurosensory testing was performed using a 10 g monofilament at 4 locations on each foot and a 128 Hz tuning fork at one location on each foot. The same techniques were used prior to, and at conclusion of the race.Results. We detected no neuropraxia or sensory deficits in any participant, despite reports by the same subjects that they had experienced the phenomenon during the race. While runners commonly report losing sensation in their feet during long runs, we were unable to demonstrate any sensory deficit with simple field-based testing.Conclusion. We believe that there is room for additional research to be performed using more sensitive means of neurosensory evaluation.

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Responsiveness of The Countermovement Jump and Handgrip Strength to an Incremental Running Test in Endurance Athletes: Influence of Sex

Journal of Human Kinetics ◽

10.1515/hukin-2017-0121 ◽

2018 ◽

Vol 61 (1) ◽

pp. 199-208

Author(s):

Felipe García-Pinillos ◽

Pedro Delgado-Floody ◽

Cristian Martínez-Salazar ◽

Pedro Á. Latorre-Román

Keyword(s):

Heart Rate ◽

Significant Relationship ◽

Recovery Time ◽

Heart Rate Recovery ◽

Handgrip Strength ◽

Endurance Athletes ◽

Distance Runners ◽

Countermovement Jump ◽

Long Distance ◽

Strength Performance

AbstractThe present study analyzed the acute effects of an incremental running test on countermovement jump (CMJ) and handgrip strength performance in endurance athletes, considering the effect of post-exercise recovery time and sex. Thirty-three recreationally trained long-distance runners, 20 men and 13 women, participated voluntarily in this study. The participants performed the Léger test, moreover, the CMJ and handgrip strength tests were carried out before and after the running test and during different stages of recovery (at the 1st min of recovery (posttest1), 5th min of recovery (posttest2), and 10th min of recovery (posttest3)). Two-way analysis of variance revealed a significant improvement in the CMJ (pre-posttest1,p= 0.001) and handgrip strength (pre-posttest2,p= 0.017) during recovery time. The Pearson’s Chi-2 test showed no significant relationship (p≥ 0.05) between sex and post-activation potentiation (PAP). A linear regression analysis pointed to heart rate recovery as a predictive factor of CMJ improvement (PAP). In conclusion, despite significant fatigue reached during the Léger test, the long-distance runners did not experience an impaired CMJ and handgrip strength performance, either men or women, achieving an improvement (PAP) in posttest conditions. The results obtained showed no significant relationship between sex and PAP. Moreover, significant effect of recovery after running at high intensity on CMJ performance and handgrip strength was found. Finally, the data suggest that PAP condition can be predicted by heart rate recovery in endurance runners.

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Familial aspects of decreased hypoxic drive in endurance athletes

Journal of Applied Physiology ◽

10.1152/jappl.1978.44.3.464 ◽

1978 ◽

Vol 44 (3) ◽

pp. 464-468 ◽

Cited By ~ 53

Author(s):

C. H. Scoggin ◽

R. D. Doekel ◽

M. H. Kryger ◽

C. W. Zwillich ◽

J. V. Weil

Keyword(s):

Shape Parameter ◽

Ventilatory Response ◽

Endurance Athletes ◽

Hypoxic Ventilatory Response ◽

Distance Runners ◽

Similar Extent ◽

Long Distance ◽

Ventilatory Responses ◽

Familial Influences ◽

Ventilatory Response To Hypoxia

One difference between endurance athletes and nonathletes is decreased ventilatory responsiveness to hypoxia and hypercapnia. It has never been clear whether these decreased responses are a consequence of conditioning or precede participation in endurance athletics. Recent studies demonstrating clusters of decreased ventilatory responses to hypoxia in families of patients with unexplained respiratory failure suggest that decreased responses in endurance athletes might be familial. To investigate this possibility, ventilatory response to hypoxia and hypercapnia were measured in 16 nonathletic, healthy parents and siblings of five successful long-distance runners. Response were compared to 34 nonathletic controls. As measured by the shape parameter A, hypoxic response was decreased to a similar extent in runners 74 +/- 6.4 (mean +/- SE) (P less than 0.05) and their relatives 69 +/- 15.2 (P less than 0.01) compared to control 128 +/- 11.3. Hypercapnic responses were slightly, but not significantly, decreased in runners and their families. We conclude familial influences made a major contribution to the decreased hypoxic ventilatory response seen in long-distance runners.

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