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Monitoring training load

David Herzig, Moreno Testorelli, Daniela Schäfer Olstad, Daniel Erlacher, Peter Achermann, Prisca Eser, Matthias Wilhelm
BACKGROUND/AIM: There is increasing popularity for athletes to use heart rate variability (HRV) to tailor training. A time-efficient method is HRV assessment during deep sleep. The aim was to validate the selection of deep sleep segments identified by RR-intervals with simultaneous electroencephalography (EEG) recordings and to compare HRV parameters of these segments with those of standard morning supine measurements. METHODS: In 11 world class alpine- skiers, RR-intervals were monitored during ten nights and simultaneous EEGs were recorded in 2-4 nights...
September 26, 2016: International Journal of Sports Physiology and Performance
C Roehrig, M Govier, J Robinson, A Aneman
BACKGROUND: It remains unclear whether measuring carotid arterial flow by the time velocity integral using vascular Doppler ultrasound can be used to monitor cardiac output and volume responsiveness. METHODS: The carotid Doppler flow (time velocity integral and peak flow velocity variation) was assessed in triplicate by an intensivist with formal vascular ultrasound training. Thirty-three patients admitted following coronary by-pass surgery were studied before and after a passive leg-raising manoeuvre to investigate volume responsiveness (more than 10% increase in cardiac output) along with indices of arterial load measuring cardiac output by thermodilution...
October 21, 2016: Acta Anaesthesiologica Scandinavica
Jaspal Singh, R K Sharma, A K Gupta
Computers are used extensively in sleep labs for polysomnography and for assistance in sleep staging. However, the test is highly inconvenient to the patient and requires availability of specially equipped sleep labs. Alternative approaches that enable unobtrusive in-home sleep staging with ECG or other signals are highly desirable. In this paper we describe a method that can be used for distinction of REM and NREM sleep stages using spectral and non-linear features of ECG derived RR interval series. To test the accuracy of the system, we extracted the RR interval series from sleep studies of 20 young healthy individuals...
September 23, 2016: Computers in Biology and Medicine
Gregory Roe, Joshua Darrall-Jones, Kevin Till, Padraic Phibbs, Dale Read, Jonathon Weakley, Ben Jones
PURPOSE: The purpose of this study was to evaluate changes in performance of a 6-second cycle ergometer test (CET) and countermovement jump (CMJ) during a 6-week training block in professional rugby union players. METHODS: Twelve young professional rugby union players performed two CET and CMJ on the first and fourth morning of every week prior to the commencement of daily training during a 6-week training block. Standardised changes in the highest score of two CET and CMJ efforts were assessed using linear mixed modelling and magnitude-based inferences...
October 13, 2016: International Journal of Sports Physiology and Performance
Juliana Arcanjo Lino, Gabriela Carvalho Gomes, Nancy Delma Silva Vega Canjura Sousa, Andrea K Carvalho, Marcelo Emanoel Bezerra Diniz, Antonio Brazil Viana Junior, Marcelo Alcantara Holanda
BACKGROUND: Teaching mechanical ventilation at the bedside with real patients is difficult with many logistic limitations. Mechanical ventilators virtual simulators (MVVS) may have the potential to facilitate mechanical ventilation (MV) training by allowing Web-based virtual simulation. OBJECTIVE: We aimed to identify and describe the current available MVVS, to compare the usability of their interfaces as a teaching tool and to review the literature on validation studies...
June 14, 2016: JMIR Med Educ
Gihoon Choi, Daniel Song, Sony Shrestha, Jun Miao, Liwang Cui, Weihua Guan
In response to the urgent need of a field-deployable and highly sensitive malaria diagnosis, we developed a standalone, "sample-in-answer-out" molecular diagnostic system (AnyMDx) to enable quantitative molecular analysis of blood-borne malaria in low resource areas. The system consists of a durable battery-powered analyzer and a disposable microfluidic compact disc loaded with reagents ready for use. A low power thermal module and a novel fluorescence-sensing module are integrated into the analyzer for real-time monitoring of loop-mediated isothermal nucleic acid amplification (LAMP) of target parasite DNA...
October 10, 2016: Lab on a Chip
Wassim Moalla, Mohamed Saifeddin Fessi, Fayçal Farhat, Sabeur Nouira, Del P Wong, Grégory Dupont
We studied the relationship between daily training load (TL) experienced by professional soccer players and the Hooper questionnaire reflecting their perceived quality of sleep, fatigue, stress and delayed onset muscle soreness. During a 16-week training period, the rating of perceived exertion and duration were collected after each training session, and daily TL was calculated from 14 professional soccer players. The Hooper questionnaire was completed every day before the first training session and the Hooper's score (HS) was then calculated...
October 7, 2016: Research in Sports Medicine
Benoit Capostagno, Michael I Lambert, Robert P Lamberts
Finding the optimal balance between high training loads and recovery is a constant challenge for cyclists and their coaches. Monitoring improvements in performance and levels of fatigue is recommended to correctly adjust training to ensure optimal adaptation. However, many performance tests require a maximal or exhaustive effort, which reduces their real-world application. The purpose of this review was to investigate the development and use of submaximal cycling tests that can be used to predict and monitor cycling performance and training status...
September 2016: International Journal of Sports Physiology and Performance
L Passfield, Jg Hopker, S Jobson, D Friel, M Zabala
Mobile power meters provide a valid means of measuring cyclists' power output in the field. These field measurements can be performed with very good accuracy and reliability making the power meter a useful tool for monitoring and evaluating training and race demands. This review presents power meter data from a Grand Tour cyclist's training and racing and explores the inherent complications created by its stochastic nature. Simple summary methods cannot reflect a session's variable distribution of power output or indicate its likely metabolic stress...
August 12, 2016: Journal of Sports Sciences
Francesco Sartor, Silvia Capuzzoni, Gianluca Rospo, Antonio La Torre, Fulvio Vailati, Emanuele Vailati
In gymnastics high levels of executive attention, physical and coordinative capacities are required. However, training planning does not usually account for dynamic alterations in cognitive capacity. This study investigated whether cognitive capacity was altered by the approach of a competition. Ten elite male gymnasts (16 ± 2yrs, 57.3 ± 16.1kg, 1.64 ± 1.27m) were monitored for sleep, life-demands, rating of perceived effort (RPE) and pain, starting 5 days before the competition and up to 5 days after it...
September 21, 2016: Journal of Strength and Conditioning Research
Brendan R Scott, Katie M Slattery, Dean V Sculley, Catriona Lockhart, Ben J Dascombe
This study assessed whether hypoxia augments anabolic responses to moderate-load resistance exercise. Fourteen trained males performed moderate-load resistance exercise in normoxia (NORM; fraction of inspired oxygen [FIO2] = 21%) and moderate-level hypoxia (MH; FIO2 = 16%). Exercise comprised 3 sets of 10 repetitions of squats and deadlifts at 60% of 1-repetition maximum, with 60 s inter-set rest. Blood lactate (BLa) was quantified after each exercise, while arterial oxygen saturation (SpO2) and heart rate (HR) were assessed following each set...
September 20, 2016: Journal of Strength and Conditioning Research
Steven A Loiselle, Davi Gasparini Fernandes Cunha, Scott Shupe, Elsa Valiente, Luciana Rocha, Eleanore Heasley, Patricia Pérez Belmont, Avinoam Baruch
Global metrics of land cover and land use provide a fundamental basis to examine the spatial variability of human-induced impacts on freshwater ecosystems. However, microscale processes and site specific conditions related to bank vegetation, pollution sources, adjacent land use and water uses can have important influences on ecosystem conditions, in particular in smaller tributary rivers. Compared to larger order rivers, these low-order streams and rivers are more numerous, yet often under-monitored. The present study explored the relationship of nutrient concentrations in 150 streams in 57 hydrological basins in South, Central and North America (Buenos Aires, Curitiba, São Paulo, Rio de Janeiro, Mexico City and Vancouver) with macroscale information available from global datasets and microscale data acquired by trained citizen scientists...
2016: PloS One
Jocelyn K Mara, Kevin G Thompson, Kate L Pumpa, Stuart Morgan
The aim of this study was to determine the high-speed running and sprinting profiles of elite female soccer players during competitive matches using a new Optical Player Tracking System. Eight stationary video cameras were positioned at vantage points surrounding the soccer field so that when each camera view was combined the entire field could be viewed simultaneously. Following each match, an optical player tracking system detected the coordinates (x,y) of each player for every video frame. Algorithms applied to the x and y coordinates were used to determine activity variables for twelve elite female players across seven competitive matches...
September 6, 2016: Journal of Strength and Conditioning Research
Lachlan P James, Emma M Beckman, Vincent G Kelly, G Gregory Haff
PURPOSE: To determine whether the maximal strength, impulse and power characteristics of competitive mixed martial arts (MMA) athletes differ according to competition level. METHODS: Twenty-nine male semi-professional and amateur MMA competitors were stratified into either higher-level (HL) or lower-level (LL) performers on the basis of competition grade and success. The one-repetition maximum (1RM) squat was used to assess lower body dynamic strength, while a spectrum of impulse, power, force and velocity variables were evaluated during an incremental load jump squat...
September 15, 2016: International Journal of Sports Physiology and Performance
Dean Ritchie, Will G Hopkins, Martin Buchheit, Justin Cordy, Jonathan D Bartlett
PURPOSE: Training volume, intensity and distribution are important factors during periods of return to play. The aim of this study was to quantify the effect of injury on training load (TL) before and after return to play (RTP) in professional Australian Rules Football. METHODS: Perceived training load (RPE-TL) for 44 players was obtained for all indoor & outdoor training sessions, while field-based training was monitored via GPS (total distance, high-speed running, mean speed)...
September 15, 2016: International Journal of Sports Physiology and Performance
Germano Gallicchio, Thomas Finkenzeller, Gerold Sattlecker, Stefan Lindinger, Kerstin Hoedlmoser
This study explored the influence of sub-maximal cardiovascular load on electroencephalographic (EEG) activity preceding biathlon shooting. Frontal-midline theta and alpha power were examined to assess monitoring processes and cortical inhibition, respectively. Thirteen experienced biathletes (mean age: 17years; 5 males, 8 females) fired sets of five consecutive shots from the standing position at a 50-m-distant target, under two fixed-order conditions: (i) at rest and (ii) immediately after 3-min exercise on a bicycle ergometer at 90% of maximum heart rate (HR)...
September 9, 2016: International Journal of Psychophysiology
Michel S Brink, Anna W Kersten, Wouter G P Frencken
: A mismatch between the intended training exertion by the coach and the perceived exertion by players is well established in sports. However, it is unknown if coaches are able to accurately observe exertion of individual players during training. Furthermore, the discrepancy in coaches' and players' perceptions has not been explained. PURPOSE: We aim to 1) determine the relation between intended and observed training exertion by the coach and perceived training exertion by the player and 2) establish if on-field training characteristics, intermittent endurance capacity and maturity status explain the mismatch...
September 6, 2016: International Journal of Sports Physiology and Performance
Fernando Pareja-Blanco, Luis Sánchez-Medina, Luis Suárez-Arrones, Juan José González-Badillo
AIM: To analyze the effects of two resistance training (RT) programs that used the same relative loading but different repetition volume, using the velocity loss during the set as the independent variable: 15% (VL15) vs. 30% (VL30). METHODS: Sixteen professional soccer players with RT experience (age 23.8 ± 3.5 years, body mass 75.5 ± 8.6 kg) were randomly assigned to two groups: VL15 (n = 8) or VL30 (n = 8) that followed a 6-week (18 sessions) velocity-based squat training program...
September 6, 2016: International Journal of Sports Physiology and Performance
Nils Haller, Suzan Tug, Sarah Breitbach, Arne Jörgensen, Perikles Simon
PURPOSE: Increases in cfDNA concentrations have recently been demonstrated to occur in a variety of exhausting and vigorous exercise settings. Here we assessed the association of cfDNA with exercise duration and intensity in a controlled test-retest setting of a regenerative up to moderate aerobic run. METHODS: In a pre-test the lactate threshold (LT) was determined in 13 subjects (range: 10.8-13.4 km/h) by means of a step-wise incremental running test. Speed of the two endurance runs was set to 9...
September 6, 2016: International Journal of Sports Physiology and Performance
T Bouaziz, E Makni, P Passelergue, Z Tabka, G Lac, W Moalla, K Chamari, M Elloumi
The effectiveness of selected physiological and perceptual measures for monitoring training load and fatigue was studied in 16 male elite rugby sevens players during a 6-week intense training block (IT) and 2-week tapering (TAP). Daily training load (TL) and strain (TS) as well as weekly total score of fatigue (TSF) were quantified respectively by the session-rating of perceived exertion (RPE) method and an 8-item questionnaire. Also, testing was performed and 24 h urinary cortisol (C), cortisone (Cn), adrenaline (A) and noradrenalin (NA) excretion was measured before (T0) and after the IT (T1) and after the TAP (T2)...
September 2016: Biology of Sport
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