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Athlete, monitoring

David A Shearer, William Sparkes, Jonny Northeast, Daniel J Cunningham, Christian J Cook, Liam P Kilduff
OBJECTIVES: Biochemical (e.g. creatine kinase (CK)) and neuromuscular (e.g. peak power output (PPO)) markers of recovery are expensive and require specialist equipment. Perceptual measures are an effective alternative, yet most validated scales are too long for daily use. DESIGN: This study utilises a longitudinal multi-level design to test an adapted Brief Assessment of Mood (BAM+), with four extra items and a 100mm visual analogue scale to measure recovery. METHODS: Elite under-21 academy soccer players (N=11) were monitored across five games with data (BAM+, CK and PPO) collected for each game at 24h pre, 24h and 48h post-match...
October 5, 2016: Journal of Science and Medicine in Sport
Daniel J Owens, Jonathan C Y Tang, Warren J Bradley, S Andy Sparks, William D Fraser, James P Morton, Graeme L Close
PURPOSE: Supplementation with dietary forms of vitamin D is commonplace in clinical medicine, elite athletic cohorts and the general population, yet the response of all major vitamin D metabolites to high doses of vitamin D is poorly characterized. We aimed to identify the responses of all major vitamin D metabolites to moderate and high dose supplemental vitamin D3. METHODS: A repeated measures design was implemented in which 46 elite professional European athletes were block randomized based on their basal 25[OH]D concentration into two treatment groups...
October 13, 2016: Medicine and Science in Sports and Exercise
Daniel J Plews, Paul B Laursen, Martin Buchheit
PURPOSE: Heart rate variability (HRV) is a popular tool for monitoring autonomic nervous system status and training adaptation in athletes. It is believed that increases in HRV indicate effective training adaptation, but these are not always apparent in elite athletes. METHODS: Resting HRV was recorded in 4 elite rowers (Rower A, B, C and D) over the 7-week period prior to 2015 World Rowing Championship success. The natural logarithm of the square root of the mean sum of the squared differences between R-R intervals (Ln rMSSD), Ln rMSSD:R-R ratio trends, and the Ln rMSSD to R-R interval relationship were assessed for each champion-winning rower...
October 13, 2016: International Journal of Sports Physiology and Performance
Stephen Crowcroft, Erin McCleave, Katie Slattery, Aaron J Coutts
PURPOSE: To assess measurement sensitivity and diagnostic characteristics of athlete monitoring tools to identify performance change. METHODS: Fourteen nationally competitive swimmers (11 males, 3 females, age: 21.2 ± 3.2 y) recorded daily monitoring over 15 months. The "Self-report" group (n=7) reported general health, energy levels, motivation, stress, recovery, soreness and wellness. The "Combined" group (n=7) recorded sleep quality, perceived fatigue, total quality recovery (TQR) and heart rate variability measures...
October 13, 2016: International Journal of Sports Physiology and Performance
Daniel Jardines, Francesco Botrè, Cristiana Colamonici, Davide Curcio, Gemma Procida, Xavier de la Torre
The detection of the abuse of pseudo-endogenous steroids (testosterone and/or its precursors) is currently based on the application of the steroid module of the World Antidoping Agency (WADA), Athletes' Biological Passport (ABP), implemented through ADAMS. Diagnostic metabolites are monitored for every athlete and statistically evaluated with a predictive Bayesian approach. In the case of suspicious samples, the data of the ABP are confirmed and the isotope ratio mass spectrometry (IRMS) test is activated. We have previously demonstrated that IRMS enables confirmation of the non-endogenous origin of pseudo-endogenous steroids in otherwise non-suspicious samples, after a longitudinal evaluation of the ABP, even after the inclusion of additional long term diagnostic hydroxylated metabolites, and that the delta values of the parameters obtained during the IRMS confirmation process presented a much lesser variability compared to the parameters of the ABP...
October 12, 2016: Drug Testing and Analysis
E E Koenders, C P G Franken, J D Cotter, S N Thornton, N J Rehrer
Exercise-associated hyponatremia can be life-threatening. Excessive hypotonic fluid ingestion is the primary etiological factor but does not explain all variability. Possible effects of chronic sodium intake are unknown. The aim of this study was to determine whether dietary sodium affects plasma sodium concentration [Na(+) ] during exercise in the heat, when water intake nearly matches mass loss. Endurance-trained men (n = 9) participated in this crossover experiment. Each followed a low-sodium (lowNa) or high-sodium (highNa) diet for 9 days with 24-h fluid intakes and urine outputs measured before experimental trials (day 10)...
October 7, 2016: Scandinavian Journal of Medicine & Science in Sports
Nicola Relph, Lee Herrington
BACKGROUND: Following an ACL injury, reconstruction (ACL-R) and rehabilitation, athletes may return to play with a proprioceptive deficit. However, literature is lacking to support this hypothesis in elite athletic groups who have returned to international levels of performance. It is possible the potentially heightened proprioceptive ability evidenced in athletes may negate a deficit following injury. The purpose of this study was to consider the effects of ACL injury, reconstruction and rehabilitation on knee joint position sense (JPS) on a group of elite athletes who had returned to international performance...
October 3, 2016: Knee
Evelien Backx, Cindy van der Avoort, Michael Tieland, Kamiel Maase, Arie Kies, Luc van Loon, Lisette de Groot, Marco Mensink
Studies monitoring vitamin D status in athletes are seldom conducted for a period of 12 months or longer, thereby lacking insight into seasonal fluctuations. The objective of the cur-rent study was to identify seasonal changes in total 25-hydroxyvitamin D (25(OH)D) concen-tration throughout the year. Fifty-two, mainly Caucasian athletes with a sufficient 25(OH)D concentration (>75 nmol/L) in June were included in this study. Serum 25(OH)D concentra-tion was measured every three months (June, September, December, March, June)...
October 6, 2016: International Journal of Sport Nutrition and Exercise Metabolism
Hideyuki Nukaga, Tomotaka Takeda, Kazunori Nakajima, Keishiro Narimatsu, Takamitsu Ozawa, Keiichi Ishigami, Kazuo Funato
Teeth clenching has been shown to improve remote muscle activity (by augmentation of the Hoffmann reflex), and joint fixation (by decreased reciprocal inhibition) in the entire body. Clenching could help maintain balance, improve systemic function, and enhance safety. Teeth clenching from a sports dentistry viewpoint was thought to be important and challenging. Therefore, it is quite important to investigate mastication muscles' activity and function during sports events for clarifying a physiological role of the mastication muscle itself and involvement of mastication muscle function in whole body movement...
2016: Open Dentistry Journal
Timo Hänninen, Jari Parkkari, Markku Tuominen, Grant L Iverson, Juha Öhman, Matti Vartiainen, Teemu M Luoto
OBJECTIVES: To examine test-retest reliability of the SCAT3 for two consecutive seasons using a large sample of professional male ice hockey players, and to make recommendations for interpreting change on the test. DESIGN: A cross-sectional descriptive study. METHODS: Preseason baseline testing was administered in the beginning of the seasons 2013-2014 and 2014-2015 to 179 professional male hockey players in rink side settings. RESULTS: The test-retest reliabilities of the SCAT3 components were uniformly low...
October 1, 2016: Journal of Science and Medicine in Sport
Tracey J Smith, Marques A Wilson, James P Karl, Krista Austin, Asma Bukhari, Stefan M Pasiakos, Kristie L O'Connor, Harris R Lieberman
: Military personnel and some athlete populations endure short-term energy deficits from reduced energy intake and/or increased energy expenditure (EE) that may degrade physical and cognitive performance due to severe hypoglycemia (<3.1 mmol/L). The extent to which energy deficits alter normoglycemia (3.9-7.8 mmol/L) in healthy individuals is not known since prior studies measured glucose infrequently, not continuously. PURPOSE: To characterize the glycemic response to acute, severe energy deficit compared to fully fed control condition, using continuous glucose monitoring (CGM)...
September 29, 2016: Journal of Applied Physiology
P Á Latorre-Román, F García Pinillos, P Bujalance-Moreno, V M Soto-Hermoso
The main purpose of this study was to evaluate running kinematic characteristics and foot strike patterns (FSP) during early and late stages of actual and common high-intensity intermittent training (HIIT): 5 × 2000 m with 120-s recovery between runs. Thirteen healthy, elite, highly trained male endurance runners participated in this study. They each had a personal record in the half-marathon of 70 ± 2.24 min, and each had a minimum experience of 4 years of training and competition. Heart rate (HR) and rate of perceived exertion (RPE) were monitored during HIIT...
August 11, 2016: Journal of Sports Sciences
Imen Fekhfekh, Abdelmoneem Yahia, Mokhtar Chaabene, Salma Jribi, Nizar Suissi, Mohamed Habib Elleuch, Sameh Ghroubi
OBJECTIVE: To study the acute effect of static and dynamic stretching on the knee muscle strength and postural capacity in athletes. PATIENTS AND METHODS: Fifteen judokas performed 2 stretching protocols (static and dynamic) on the muscles of both lower limbs with an interval of 48hours in a random order. An evaluation of the dominant knee muscle strength with an isokinetic dynamometer CybexNormII was performed before and after each stretching protocol in a concentric mode at a speed of 60 and 180°/s...
September 2016: Annals of Physical and Rehabilitation Medicine
José Jair Alves Mendes, Mário Elias Marinho Vieira, Marcelo Bissi Pires, Sergio Luiz Stevan
The following work presents an overview of smart sensors and sensor fusion targeted at biomedical applications and sports areas. In this work, the integration of these areas is demonstrated, promoting a reflection about techniques and applications to collect, quantify and qualify some physical variables associated with the human body. These techniques are presented in various biomedical and sports applications, which cover areas related to diagnostics, rehabilitation, physical monitoring, and the development of performance in athletes, among others...
2016: Sensors
Tommi Sliiden, Sara Beck, Ian MacDonald
OBJECTIVES: Breathing strategies for athletic dancing are quite different from those needed for legato singing. This study considers the respiration data recorded by a telemetric heart rate monitor, mask, and gas analyzer collected from 20 musical theater professionals performing set tasks. METHODS: Scores were taken of maximum phonation time (MPT), relative oxygen uptake, and heart rate immediately after three tasks: (1) singing only, (2) dancing only, and (3) singing while dancing...
September 22, 2016: Journal of Voice: Official Journal of the Voice Foundation
Harold M Olson, Michael J Tunning, Ronnie J Boesch
OBJECTIVE: The purpose of this study is to describe the chiropractic management of a student athlete with postconcussion syndrome. CLINICAL FEATURES: A 14-year-old male hockey player presented to a chiropractic clinic with postconcussion symptoms 13 days after his initial injury. He experienced an occipital headache with a pain rating of 8/10, upset stomach, blurry vision, nausea, dizziness, balance problems, a "foggy feeling," difficulty with concentration, difficulty with memory, fatigue, confusion, drowsiness, and irritability...
September 2016: Journal of Chiropractic Medicine
Katia Collomp, Alexandre Arlettaz, Corinne Buisson, Anne-Marie Lecoq, Cynthia Mongongu
It is generally acknowledged in the sporting world that glucocorticoid (GC) use enhances physical performance. This pharmacological class is therefore banned by the World Anti-Doping Agency (WADA) in in-competition samples after systemic but not local (defined as any route other than oral, intravenous, intramuscular or rectal) administration, which thus allows athletes to use GCs for therapeutic purposes. According to the 2016 WADA list, the urine reporting level for all GCs is set at 30ng/ml to distinguish between the authorized and banned routes of administration...
November 2016: Steroids
Andreas Zafeiridis, Anastasia Chrysovalantou Chatziioannou, Haralambos Sarivasiliou, Antonios Kyparos, Michalis G Nikolaidis, Ioannis S Vrabas, Alexandros Pechlivanis, Panagiotis Zoumpoulakis, Constantinos Baskakis, Konstantina Dipla, Georgios A Theodoridis
The overall metabolic/energetic stress that occurs during an acute bout of exercise is proposed to be the main driving force for long-term training adaptations. Continuous and high-intensity interval exercise protocols (HIIE) are currently prescribed to acquire the muscular and metabolic benefits of aerobic training. We applied (1)H NMR-based metabonomics to compare the overall metabolic perturbation and activation of individual bioenergetic pathways of three popular aerobic exercises matched for effort/strain...
October 4, 2016: Journal of Proteome Research
Natalia Romero-Franco, Juan Antonio Montaño-Munuera, Pedro Jiménez-Reyes
CONTEXT: Knee joint position sense (JPS) is a key parameter for optimum performance in many sports, but is frequently negatively affected by injuries and/or fatigue during training sessions. Although evaluation of JPS may provide key information to reduce the risk of injury, it often requires expensive and/or complex tools that make monitoring proprioceptive deterioration difficult. OBJECTIVE: This study sought to analyze the validity and reliability of a digital inclinometer to measure knee JPS in a closed kinetic chain (CKC)...
August 24, 2016: Journal of Sport Rehabilitation
Megan N Houston, Johanna M Hoch, Bonnie L Van Lunen, Matthew C Hoch
CONTEXT: Health-related quality of life (HRQOL) is a broad term for the impact of injury or illness on physical, psychological, and social health dimensions. Injury has been associated with decreased HRQOL in athletes. However, the influence of injury history, participation status, time since last injury, and injury severity on HRQOL remains unclear. OBJECTIVE: To compare HRQOL in collegiate athletes based on injury history, participation status, time since last injury, and injury severity and to examine relationships between HRQOL outcomes...
August 24, 2016: Journal of Sport Rehabilitation
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