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https://www.readbyqxmd.com/read/28522767/individual-hemoglobin-mass-response-to-normobaric-and-hypobaric-live-high-train-low-a-one-year-crossover-study
#1
Anna Hauser, Severin Troesch, Jonas J Saugy, Laurent Schmitt, Roberto Cejuela-Anta, Raphael Faiss, Thomas Steiner, Neil Robinson, Grégoire P Millet, Jon Peter Wehrlin
PURPOSE: To compare individual hemoglobin mass (Hbmass) changes following a live high-train low (LHTL) altitude training camp under either normobaric hypoxia (NH) or hypobaric hypoxia (HH) conditions in endurance athletes. METHODS: In a crossover design with a one-year washout, 15 male triathletes randomly performed two 18-d LHTL training camps in either HH or NH. All athletes slept at 2250 m and trained at altitudes < 1200 m. Hbmass was measured in duplicate with the optimized carbon monoxide rebreathing method before (pre-) and immediately after (post-) each 18 d training camp...
May 18, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28514808/physiological-dynamic-apnea-responses-in-relation-to-apnea-capacity-in-triathletes
#2
Alexandre Guimard, Houssem Zorgati, Sylvain Brulaire, Virgile Amiot, Fabrice Prieur, Katia Collomp
The aim was to assess the cardiac, arterial oxygen saturation, lactate, hormonal and Borg rating of perceived exertion (RPE) responses to acute apnea in relation to apnea capacity in 18 middle-aged triathletes. Subjects were monitored while swimming two 50-m freestyle exercise trials with fins at maximal speed: with normal frequency breathing (NB) and with complete apnea (Ap); the latter was used to assess apnea capacity. The subjects with significant alteration in swimming performance inducing a time increase greater than 2...
May 17, 2017: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/28514233/energy-balance-over-one-athletic-season
#3
Analiza M Silva, Catarina N Matias, Diana A Santos, Diana Thomas, Anja Bosy-Westphal, Manfred J Müller, Steven B Heymsfield, Luís B Sardinha
INTRODUCTION: Magnitude and variation in energy balance (EB) components over an athletic season are largely unknown. PURPOSE: We investigated the longitudinal changes in EB over one season and explored the association between EB variation and the change in the main fat-free mass (FFM) components in highly trained athletes. METHODS: Eighty athletes (54 males; handball, volleyball, basketball, triathlete, and swimming) were evaluated from the beginning of the season to the main competition stage...
March 22, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28507970/a-new-technique-for-surgical-treatment-of-proximal-hamstring-tendinopathy-in-a-triathlon-athlete
#4
Lincoln Paiva Costa, Antônio Augusto Guimarães Barros, Carlos Cesar Vassalo, Bertrand Sonnery-Cottet, Victor Atsushi Kasuya Barbosa, Eduardo Frois Temponi
INTRODUCTION: Proximal hamstring tendinopathy (PHT) is the result of chronic overload caused by repetitive eccentric contraction. Surgical treatment becomes an option for patients with chronic symptoms that do not respond to conservative treatment. CASE REPORT: This report describes a case of a 48-year-old man, an amateur triathlete, with deep gluteal pain in the left hip for 12 months, leading to a decline in sports performance. Magnetic resonance imaging revealed abnormalities that suggested a PHT...
November 2016: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28497283/the-impact-of-resistance-training-on-swimming-performance-a-systematic-review
#5
REVIEW
Emmet Crowley, Andrew J Harrison, Mark Lyons
BACKGROUND: The majority of propulsive forces in swimming are produced from the upper body, with strong correlations between upper body strength and sprint performance. There are significant gaps in the literature relating to the impact of resistance training on swimming performance, specifically the transfer to swimming performance. OBJECTIVE: The aims of this systematic literature review are to (1) explore the transfer of resistance-training modalities to swimming performance, and (2) examine the effects of resistance training on technical aspects of swimming...
May 12, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28398949/sildenafil-possible-prophylaxis-against-swimming-induced-pulmonary-edema-sipe
#6
Stefanie D Martina, John J Freiberger, Dionne F Peacher, Michael J Natoli, Eric A Schinazi, Dawn N Kernagis, Jennifer Av Potter, Claire E Otteni, Richard E Moon
Swimming-induced pulmonary edema (SIPE) occurs during swimming and scuba diving, usually in cold water, in susceptible healthy individuals, especially military recruits and triathletes. We have previously demonstrated that pulmonary artery pressure (PAP) and pulmonary artery wedge pressure (PAWP) are higher during immersed exercise in SIPE-susceptible individuals vs. controls, confirming that SIPE is a form of hemodynamic pulmonary edema. Oral sildenafil 50 mg 1 hour before immersed exercise reduced PAP and PAWP, suggesting that sildenafil may prevent SIPE...
April 11, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28350714/multiple-transportable-carbohydrate-impact-on-long-distance-triathlon-performance
#7
David S Rowlands, Stuart D Houltham
The ingestion of multiple (2:1 glucose:fructose) transportable carbohydrate in beverages at high rates (>78 g·h) during endurance exercise enhances exogenous carbohydrate oxidation, fluid absorption, gut comfort, and performance, relative to glucose alone. But during long-distance endurance competition, athletes prefer a solid-gel-drink format, and the effect size of multiple-transportable carbohydrate is unknown. PURPOSE: To determine the effect of multiple-transportable carbohydrate on triathlon competition performance when ingested within bars, gels, and drinks...
March 27, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28332025/endurance-aerobic-high-intensity-and-repeated-sprint-cycling-performance-is-unaffected-by-normobaric-live-high-train-low-a-double-blind-placebo-controlled-cross-over-study
#8
Jacob Bejder, Andreas Breenfeldt Andersen, Rie Buchardt, Tanja Hultengren Larsson, Niels Vidiendal Olsen, Nikolai Baastrup Nordsborg
The aim was to investigate whether 6 weeks of normobaric "Live High-Train Low" (LHTL) using altitude tents affect highly trained athletes incremental peak power, 26-km time-trial cycling performance, 3-min all-out performance, and 30-s repeated sprint ability. In a double-blinded, placebo-controlled cross-over design, seven highly trained triathletes were exposed to 6 weeks of normobaric hypoxia (LHTL) and normoxia (placebo) for 8 h/day. LHTL exposure consisted of 2 weeks at 2500 m, 2 weeks at 3000 m, and 2 weeks at 3500 m...
May 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28295487/sperm-dna-fragmentation-as-a-result-of-ultra-endurance-exercise-training-in-male-athletes
#9
D Vaamonde, C Algar-Santacruz, A Abbasi, J M García-Manso
Intensive sports practice seems to exert negative effects on semen parameters; in order to assess these effects, the objective of this study was to assess semen, including DNA fragmentation, and hormone parameters in elite triathletes. Twelve high-level triathletes preparing for a National Triathlon Championship participated in the study. The qualitative sperm parameters analysed were volume, sperm count, motility, morphology and DNA fragmentation; when needed, additional testing was performed. Assessed hormones were testosterone (T), cortisol (C) and testosterone-cortisol ratio (T/C)...
March 15, 2017: Andrologia
https://www.readbyqxmd.com/read/28251402/dietary-nitrate-supplementation-enhances-short-but-not-longer-duration-running-time-trial-performance
#10
Oliver Michael Shannon, Matthew John Barlow, Lauren Duckworth, Emily Williams, Georgina Wort, David Woods, Mario Siervo, John Paul O'Hara
PURPOSE: This study evaluated the effects of dietary nitrate (NO3(-)) supplementation on physiological functioning and exercise performance in trained runners/triathletes conducting short and longer-distance treadmill running time-trials (TT). METHOD: Eight trained male runners or triathletes completed four exercise performance tests comprising a 10 min warm up followed by either a 1500 or 10,000 m treadmill TT. Exercise performance tests were preceded 3 h before the exercise by supplementation with either 140 ml concentrated nitrate-rich (~12...
April 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28240713/the-cycling-power-profile-characteristics-of-national-level-junior-triathletes
#11
Christopher J Stevens, Kyle J M Bennett, Andrew R Novak, Aden B Kittel, Ben J Dascombe
With the draft-legal rule recently introduced to junior triathlon competition, it has become difficult to assess cycling performance through race results. Therefore, this study assessed the cycling power profile characteristics of national level junior triathletes to assist with physical assessment and program design. Thirteen male (17.0 ± 1.0 yr) and eleven female (17.2 ± 1.3 yr) national level junior triathletes completed a cycling power profile that consisted of maximal intervals that lasted 6, 15, 30, 60, 240 and 600 seconds in duration...
February 23, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28236712/a-biomechanical-evaluation-of-the-combined-elevation-test
#12
Sam Allen, Gemma Phillips, Steve McCaig
OBJECTIVES: To evaluate biomechanically the relationships between the outcome of the Combined Elevation Test, its component joint motions, and thoracic spine angles. DESIGN: Cross-sectional study. SETTING: Laboratory. PARTICIPANTS: 18 elite swimmers and triathletes (11 males and 7 females). MAIN OUTCOME MEASURES: Combined Elevation Test outcome in forehead and chin positions. Individual joint contributions to test outcome...
May 2017: Physical Therapy in Sport
https://www.readbyqxmd.com/read/28230417/aging-and-half-ironman-performance
#13
M J Stones, Adric Hartin
Background/Study Context: Previous research on triathlon performance analyzed age trends for the Top Ten or Top Five finishers in world championship or national races at Olympic, Half-Ironman, and Ironman distances. The findings indicated higher age declines and/or earlier onset of decline in swimming and running than cycling. However, the designs of those studies took no account of possible differences between cross-sectional and longitudinal trends (i.e., cohort differences versus age changes). METHODS: This study analyzed performance times over the inaugural 5 years of the Half-Ironman world championship held in Clearwater, Florida, from 2006 to 2010...
March 2017: Experimental Aging Research
https://www.readbyqxmd.com/read/28225523/the-age-related-performance-decline-in-ironman-triathlon-starts-earlier-in-swimming-than-in-cycling-and-running
#14
Ilja Käch, Christoph A Rüst, Pantelis T Nikolaidis, Thomas Rosemann, Beat Knechtle
In Ironman triathlon, the number of overall male and female finishers increased in the last 30 years, while an improvement in performance has been reported. Studies concluding these numbers only analysed the top ten athletes per age group instead of all finishers, therefore a selection bias might have occurred. The aim of the present study was to investigate participation, performance and the age-related performance decline of all pro and age group triathletes ranked in all Ironman triathlons held worldwide between 2002 and 2015...
February 21, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28224882/social-physique-anxiety-mental-health-and-exercise-analyzing-the-role-of-basic-psychological-needs-and-psychological-inflexibility
#15
Manuel Alcaraz-Ibáñez, Álvaro Sicilia, Rafael Burgueño
This study aimed to determine the usefulness of integrating basic psychological needs theory (BPNT) and relational frames theory (RFT) in order to explain the effects of social physique anxiety (SPA) - in the context of exercise - on exercisers' mental health. A total of 296 recreational cyclists and triathletes (100% males) aged 18 to 60 years old (M age = 35.65, SD = 9.49) completed a multi-section questionnaire assessing the target variables. Two models of structural equations with multiple mediators were tested using 5000 bootstrap samples...
February 22, 2017: Spanish Journal of Psychology
https://www.readbyqxmd.com/read/28212266/individual-patterns-in-blood-borne-indicators-of-fatigue-trait-or-chance
#16
Ross Julian, Tim Meyer, Hugh H K Fullagar, Sabrina Skorski, Mark Pfeiffer, Michael Kellmann, Alexander Ferrauti, Anne Hecksteden
Julian, R, Meyer, T, Fullagar, HHK, Skorski, S, Pfeiffer, M, Kellmann, M, Ferrauti, A, and Hecksteden, A. Individual patterns in blood-borne indicators of fatigue-trait or chance. J Strength Cond Res 31(3): 608-619, 2017-Blood-borne markers of fatigue such as creatine kinase (CK) and urea (U) are widely used to fine-tune training recommendations. However, predictive accuracy is low. A possible explanation for this dissatisfactory characteristic is the propensity of athletes to react to different patterns of fatigue indicators (e...
March 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28203462/adherence-to-follow-up-recommendations-by-triathlon-competitors-receiving-event-medical-care
#17
Jeremy D Joslin, Jarem B Lloyd, Nikoli Copeli, Derek R Cooney
Introduction. We sought to investigate triathlete adherence to recommendations for follow-up for participants who received event medical care. Methods. Participants of the 2011 Ironman Syracuse 70.3 (Syracuse, NY) who sought evaluation and care at the designated finish line medical tent were contacted by telephone approximately 3 months after the initial encounter to measure adherence with the recommendation to seek follow-up care after event. Results. Out of 750 race participants, 35 (4.6%) athletes received event medical care...
2017: Emergency Medicine International
https://www.readbyqxmd.com/read/28174540/the-influence-of-mid-event-deception-on-psychophysiological-status-and-pacing-can-persist-across-consecutive-disciplines-and-enhance-self-paced-multi-modal-endurance-performance
#18
Daniel Taylor, Mark F Smith
Purpose: To examine the effects of deceptively aggressive bike pacing on performance, pacing, and associated physiological and perceptual responses during simulated sprint-distance triathlon. Methods: Ten non-elite, competitive male triathletes completed three simulated sprint-distance triathlons (0.75 km swim, 500 kJ bike, 5 km run), the first of which established personal best "baseline" performance (BL). During the remaining two trials athletes maintained a cycling power output 5% greater than BL, before completing the run as quickly as possible...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28153693/breathing-parameters-associated-to-two-different-external-nasal-dilator-strips-in-endurance-athletes
#19
Giancarlo Ottaviano, Andrea Ermolao, Ennio Nardello, Flavio Muci, Vittorio Favero, Marco Zaccaria, Lorenzo Favero
OBJECTIVE: The aim of the study was to investigate and compare the effects of two different external nasal dilator strips (ENDS) on nasal respiratory flow, maximal oxygen uptake (VO2max), nasal VO2max, time to exhaustion and subjective nasal obstruction in adult triathletes participating in exhaustive, controlled physical exercise tests. METHODS: Thirteen healthy triathletes without nasal symptoms were recruited and randomly tested in three different conditions: without ENDS, wearing the Breathe Right(®) dilator strip and wearing the Master-aid Roll-flex(®) strip...
January 30, 2017: Auris, Nasus, Larynx
https://www.readbyqxmd.com/read/28149367/triathlon-wetsuit-removal-strategy-physiological-cost-of-running-with-a-wetsuit
#20
Mihaela Ciulei, Aaron Prado, James Navalta, John A Mercer
Triathletes exiting the swim portion of an event have to decide on how and when to take a wetsuit off (if worn). The purpose of this study was to determine the physiological cost of running while not using a wetsuit, carrying a wetsuit, wearing a wetsuit halfway down or wearing a wetsuit fully up. Participants (n = 20, 30.9 ± 8.7 yrs, 1.71 ± 0.08 m, 71.6 ± 9.5 kg) completed four 5 min running conditions: 1) not wearing the wetsuit, 2) wearing the wetsuit fully up, 3) wearing the wetsuit halfway down, and 4) carrying the wetsuit...
June 1, 2016: Journal of Human Kinetics
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