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https://www.readbyqxmd.com/read/29466267/effects-of-sprint-interval-training-with-active-recovery-vs-endurance-training-on-aerobic-and-anaerobic-power-muscular-strength-and-sprint-ability
#1
Bülent Sökmen, Ronald L Witchey, Gene M Adams, William C Beam
Sökmen, B, Witchey, RL, Adams, GM, and Beam, WC. Effects of sprint interval training with active recovery vs. endurance training on aerobic and anaerobic power, muscular strength, and sprint ability. J Strength Cond Res 32(3): 624-631, 2018-This study compared sprint interval training with active recovery (SITAR) to moderate-intensity endurance training (ET) in aerobic and anaerobic power, muscular strength, and sprint time results. Forty-two recreationally active adults were randomly assigned to a SITAR or ET group...
March 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29431556/the-fit-matters-influence-of-accelerometer-fitting-and-training-drill-demands-on-load-measures-in-rugby-league-players
#2
Blake D McLean, Cloe Cummins, Greta Conlan, Grant Duthie, Aaron J Coutts
PURPOSE: Determine the relationship between drill type and accelerometer-derived loads during various team sport activities, and examine the influence of unit fitting on these loads. METHODS: Sixteen rugby league players were fitted with microtechnology devices in either manufacturer vests or playing jerseys before completing standardised running, agility and tackling drills. Two-dimensional (2D) and three-dimensional (3D) accelerometer loads (BodyLoadTM) per km were compared across drills and fittings (i...
February 12, 2018: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/29417745/effect-of-speed-endurance-training-and-reduced-training-volume-on-running-economy-and-single-muscle-fiber-adaptations-in-trained-runners
#3
Casper Skovgaard, Danny Christiansen, Peter M Christensen, Nicki W Almquist, Martin Thomassen, Jens Bangsbo
The aim of the present study was to examine whether improved running economy with a period of speed endurance training and reduced training volume could be related to adaptations in specific muscle fibers. Twenty trained male (n = 14) and female (n = 6) runners (maximum oxygen consumption (VO2 -max): 56.4 ± 4.6 mL/min/kg) completed a 40-day intervention with 10 sessions of speed endurance training (5-10 × 30-sec maximal running) and a reduced (36%) volume of training. Before and after the intervention, a muscle biopsy was obtained at rest, and an incremental running test to exhaustion was performed...
February 2018: Physiological Reports
https://www.readbyqxmd.com/read/29389321/attenuated-total-reflectance-fourier-transformation-infrared-spectroscopy-fingerprinted-online-monitoring-of-the-kinetics-of-circulating-butyrylcholinesterase-enzyme-during-metabolism-of-bambuterol
#4
Sherif M Eid, Mohamed K Abd El-Rahman, Mohamed R Elghobashy, Khadiga M Kelani
We have described a continuous flow ATR-FTIR method for measuring some of the Butyrylcholinesterase enzyme kinetics (Km and Vmax). This is done by developing a circulating system to be close as much as possible to the human circulation using human serum as a source of the enzyme with adjusted pH, isotonicity and temperature to give the maximum affinity of the enzyme towards its substrate (bambuterol). The experiment was running continuously for 90 min to monitor the production of terbutaline from the zero time of its appearance with a measured spectrum in each minute using ZnSe prism...
April 16, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29364063/impact-of-carbohydrate-mouth-rinsing-on-time-to-exhaustion-during-ramadan-a-randomized-controlled-trial-in-jordanian-men
#5
Mo'ath F Bataineh, Ali M Al-Nawaiseh, Mohammad H Abu Altaieb, David M Bellar, Omar S Hindawi, Lawrence W Judge
Mouth rinsing using a carbohydrate (CHO) solution has been suggested to improve physical performance in fasting participants. This study examined the effects of CHO mouth rinsing during Ramadan fasting on running time to exhaustion and on peak treadmill speed (Vpeak). In a counterbalanced crossover design, 18 sub-elite male runners (Age: 21 ± 2 years, Weight: 68.1 ± 5.7 kg, VO2max: 55.4 ± 4.8 ml/kg/min) who observed Ramadan completed a familiarization trial and three experimental trials. The three trials included rinsing and expectorating a 25 mL bolus of either a 7...
January 24, 2018: European Journal of Sport Science
https://www.readbyqxmd.com/read/29334675/effects-of-running-retraining-on-biomechanical-factors-associated-with-lower-limb-injury
#6
Marcus D Dunn, David B Claxton, Graham Fletcher, Jonathan S Wheat, David M Binney
Injury risk is an important concern for runners; however, limited evidence exists regarding changes to injury risk following running style retraining. Biomechanical factors, such as absolute peak free moment, knee abduction impulse, peak foot eversion and foot eversion excursion, have been shown to predict lower limb injury. The aim of this study was to assess the effects of Pose running retraining on biomechanical factors associated with lower limb running injury. Twenty uninjured recreational runners were pair-matched based on their five km run time performance and randomly assigned to control (n = 10) and intervention (three 2-h Pose running retraining sessions) groups (n = 10)...
January 12, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29325455/influence-of-middle-distance-running-on-muscular-micro-rnas
#7
Elisa Danese, Marco Benati, Fabian Sanchis-Gomar, Cantor Tarperi, Gian Luca Salvagno, Elisa Paviati, Martina Montagnana, Federico Schena, Giuseppe Lippi
A specific subset of micro RNAs (miRs), including miR-133 and miR-206, is specifically expressed in muscle tissue, so that they are currently defined as muscular miRs (myomiRs). To further elucidate the role of myomiRs in muscle biology, we measured miR-133a and miR-206 in plasma of 28 middle-age recreational athletes. The study population consisted of 28 middle aged, recreation athletes (11 women and 17 men; mean age, 46 years) who completed a 21.1 km, half-marathon. The plasma concentration of miR-133a and miR-206, the serum concentration of creatine kinase (CK) and high-sensitivity (HS) cardiac troponin T (cTnT), as well as capillary lactate, were measured before and immediately after the run...
January 11, 2018: Scandinavian Journal of Clinical and Laboratory Investigation
https://www.readbyqxmd.com/read/29288436/the-relationships-between-internal-and-external-measures-of-training-load-and-intensity-in-team-sports-a-meta-analysis
#8
REVIEW
Shaun J McLaren, Tom W Macpherson, Aaron J Coutts, Christopher Hurst, Iain R Spears, Matthew Weston
BACKGROUND: The associations between internal and external measures of training load and intensity are important in understanding the training process and the validity of specific internal measures. OBJECTIVES: We aimed to provide meta-analytic estimates of the relationships, as determined by a correlation coefficient, between internal and external measures of load and intensity during team-sport training and competition. A further aim was to examine the moderating effects of training mode on these relationships...
December 29, 2017: Sports Medicine
https://www.readbyqxmd.com/read/29276853/are-habitual-runners-physically-inactive
#9
Timo Rantalainen, Arto J Pesola, Matthew Quittner, Nicola D Ridgers, Daniel L Belavy
The World Health Organisation's (WHO) physical activity guidelines recommend 150min/week of moderate- to vigorous-intensity physical activity (MVPA) accumulated in 10 min bouts. To see whether people performing habitual exercise for recreation meet these guidelines, 25 long-distance runners [mean 67 km/wk], 25 joggers [mean 28 km/wk], and 20 sedentary adults wore an ActiGraph GT3X+ accelerometer for 7 days. Sedentary time and bouts were similar in runners and sedentary adults (p > 0.46). Sedentary adults performed 20 ± 16 min/day of MVPA (usual bout duration (W50%): 9...
December 25, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29249083/effects-of-strength-training-on-the-physiological-determinants-of-middle-and-long-distance-running-performance-a-systematic-review
#10
REVIEW
Richard C Blagrove, Glyn Howatson, Philip R Hayes
BACKGROUND: Middle- and long-distance running performance is constrained by several important aerobic and anaerobic parameters. The efficacy of strength training (ST) for distance runners has received considerable attention in the literature. However, to date, the results of these studies have not been fully synthesized in a review on the topic. OBJECTIVES: This systematic review aimed to provide a comprehensive critical commentary on the current literature that has examined the effects of ST modalities on the physiological determinants and performance of middle- and long-distance runners, and offer recommendations for best practice...
December 16, 2017: Sports Medicine
https://www.readbyqxmd.com/read/29238260/the-effect-of-400-%C3%A2%C2%B5g-inhaled-salbutamol-on-3-km-time-trial-performance-in-a-low-humidity-environment
#11
John Molphy, John W Dickinson, Neil J Chester, Mike Loosemore, Gregory Whyte
The Objectives of the study were to investigate whether 400 µg inhaled salbutamol influences 3 km running time-trial performance and lung function in eucapnic voluntary hyperpnoea positive (EVH+ve) and negative (EVH-ve) individuals. Fourteen male participants (22.4 ± 1.6yrs; 76.4 ± 8.7kg; 1.80 ± 0.07 m); (7 EVH+ve; 7 EVH-ve) were recruited following written informed consent. All participants undertook an EVH challenge to identify either EVH+ve (↓FEV1>10%) or EVH-ve (↓FEV1<10%). Participants performed three separate 3 km running time-trials in a low-humidity (20-25%) environment on a non-motorized treadmill, 15 minutes following inhalation of salbutamol (400 µg), placebo (non-active inhalant) or control (no inhalant), in a randomized, single-blind, repeated measures design...
December 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/29200895/physiological-and-training-characteristics-of-recreational-marathon-runners
#12
Dan Gordon, Sarah Wightman, Itay Basevitch, James Johnstone, Carolina Espejo-Sanchez, Chelsea Beckford, Mariette Boal, Adrian Scruton, Mike Ferrandino, Viviane Merzbach
Purpose: The aim of this study was to examine the physical and training characteristics of recreational marathon runners within finish time bandings (2.5-3 h, 3-3.5 h, 3.5-4 h, 4-4.5 h and >4.5 h). Materials and methods: A total of 97 recreational marathon runners (age 42.4 ± 9.9 years; mass 69.2 ± 11.3 kg; stature 172.8 ± 9.1 cm), with a marathon finish time of 229.1 ± 48.7 min, of whom n = 34 were female and n = 63 were male, completed an incremental treadmill test for the determination of lactate threshold (LT1), lactate turn point (LT2) and running economy (RE)...
2017: Open Access Journal of Sports Medicine
https://www.readbyqxmd.com/read/29199781/velocity-distribution-of-women-s-30-km-cross-country-skiing-during-olympic-games-from-2002-2014
#13
Wlodzimierz S Erdmann, Dorota Dancewicz-Nosko, Vasilios Giovanis
BACKGROUND: Within several investigated endurance sport disciplines the distribution of load of the best competitors has a manner of evenly or slightly rising velocity values. Unfortunately many other competitors have usually diminishing values or when they are very poor they have evenly values. The aim of this study was to investigate distribution of velocity within 30-km cross-country female skiers. METHODS: Cross-country skiing runs were investigated of Olympic Games 2002-2014 (Salt Lake City, Turin, Vancouver, Sochi)...
December 1, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29184508/non-motorized-treadmill-running-is-associated-with-higher-cardiometabolic-demands-compared-with-overground-and-motorized-treadmill-running
#14
Robert B Edwards, Paul J Tofari, Stuart J Cormack, Douglas G Whyte
The aim of this study was to compare the cardiometabolic demands of running on a curved non-motorized treadmill (cNMT) with overground (OVR) and motorized treadmill (MOT) running. Fourteen trained male (n = 7) and female (n = 7) runners ([Formula: see text] 56.6 ± 4.0 mL.kg-1.min-1) participated in the study. Each experimental session consisted of 5 × 6-min bouts of running at progressively higher speeds, separated by 6-min rest (females 9-15 km.h-1; males 10.5-16.5 km.h-1). Oxygen consumption ([Formula: see text]) and heart rate (HR) during the last 2 min of each bout were measured using a portable metabolic cart...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29182895/efficacy-of-downhill-running-training-for-improving-muscular-and-aerobic-performances
#15
Junichi Toyomura, Hisashi Mori, Kota Tayashiki, Masayoshi Yamamoto, Hiroaki Kanehisa, Sumiaki Maeo
This study investigated effects of downhill (DR) versus level (LR) running training on various muscular and aerobic performances. Eighteen healthy young males conducted either DR (DR group [DRG], n = 10: -10% slope) or LR (LR group [LRG], n = 8) training at a target heart rate (HR) associated with lactate threshold (LT) for 20 min·session<sup>-1</sup>, 3 sessions·week<sup>-1</sup>, for 5 weeks. Before and after the interventions, the following variables were measured: knee extension torque (-150, -30, 0, 30, 150°·s<sup>-1</sup>), leg extension power (simultaneous hip and knee extension: 0...
November 28, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29176383/effect-of-jump-interval-training-on-kinematics-of-the-lower-limbs-and-running-economy
#16
Jonathan Ache-Dias, Juliano Dal Pupo, Rodolfo A Dellagrana, Anderson S Teixeira, Luis Mochizuki, Antônio R P Moro
This study analyzed the effects of the addition of jump interval training (JIT) to continuous endurance training (40-min running at 70% of peak aerobic velocity, three times per week for four weeks) on kinematic variables and running economy (RE) during submaximal constant-load running. Eighteen recreational runners, randomized into control (CG) or experimental (EG) groups performed the endurance training. In addition, the EG performed the JIT twice per week, which consisted of four to six bouts of continuous vertical jumping (30s) with five-minute intervals...
November 22, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29159682/physiological-and-biomechanical-responses-of-highly-trained-distance-runners-to-lower-body-positive-pressure-treadmill-running
#17
Kyle R Barnes, Jessica N Janecke
BACKGROUND: As a way to train at faster running speeds, add training volume, prevent injury, or rehabilitate after an injury, lower-body positive pressure treadmills (LBPPT) have become increasingly commonplace among athletes. However, there are conflicting evidence and a paucity of data describing the physiological and biomechanical responses to LBPPT running in highly trained or elite caliber runners at the running speeds they habitually train at, which are considerably faster than those of recreational runners...
November 21, 2017: Sports Medicine—Open
https://www.readbyqxmd.com/read/29126956/effect-of-graduated-compression-stockings-on-venous-lower-limb-hemodynamics-in-healthy-amateur-runners
#18
Oswaldo Teno Castilho Junior, Nei Rodrigues Alves Dezotti, Marcelo Bellini Dalio, Edwaldo Edner Joviliano, Carlos Eli Piccinato
OBJECTIVE: The objective of this study was to analyze the effect of graduated compression stockings (GCS) on venous lower limb hemodynamics in healthy amateur runners. METHODS: Ten runners were evaluated during rest and after a 10-km run without and with knee-high GCS of 20 to 30 mm Hg. Air plethysmography evaluated venous filling index (VFI), ejection fraction, and residual volume fraction (RVF) in both limbs. Capillary lactate level and heart rate were also measured...
November 7, 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/29112626/effects-of-ad-libitum-low-carbohydrate-high-fat-dieting-in-middle-age-male-runners
#19
Alexander J Heatherly, Lauren G Killen, Ashton F Smith, Hunter S Waldman, Angela Hollingsworth, Christie L Seltmann, Eric K O'Neal
PURPOSE: This study examined the effects of a 3-week ad libitum high fat (~70% of calories), low carbohydrate (<50 g/day) diet (LCHF) on markers of endurance performance in middle-aged, recreationally competitive male runners. METHODS: All subjects (n = 8) following their normal HC diet had anthropometric measures assessed and completed 5, 10-min running bouts at multiple individual race paces in the heat while physiological, metabolic variables and perceptual responses were recorded...
November 6, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29109688/weak-relationships-between-stint-duration-physical-and-skilled-match-performance-in-australian-football
#20
David M Corbett, Alice J Sweeting, Sam Robertson
Australian Rules football comprises physical and skilled performance for more than 90 min of play. The cognitive and physiological fatigue experienced by participants during a match may reduce performance. Consequently, the length of time an athlete is on the field before being interchanged (known as a stint), is a key tactic which could maximize the skill and physical output of the Australian Rules athlete. This study developed two methods to quantify the relationship between athlete time on field, skilled and physical output...
2017: Frontiers in Physiology
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