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https://www.readbyqxmd.com/read/28526625/effects-of-resistance-training-frequency-on-cardiorespiratory-fitness-in-older-men-and-women-during-intervention-and-follow-up
#1
Elena Fernández-Lezaun, Moritz Schumann, Tuomas Mäkinen, Heikki Kyröläinen, Simon Walker
This study investigated the effects of resistance training (RT) performed with different frequencies, including a follow-up period, on cardiorespiratory fitness in healthy older individuals. Eighty-eight men and women (69±3years, 167±9cm and 78±14kg) were randomly placed into four groups: training one- (M1=11, W1=12), two- (M2=7, W2=14), or three- (M3=11, W3=13) times-per-week or a non-training control group (MCon=11, WCon=9). During months 1-3, all subjects trained two-times-per-week while during the subsequent 6months, training frequency was set according to the group...
May 16, 2017: Experimental Gerontology
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/28514310/development-and-validation-of-a-mortality-risk-model-for-pediatric-sepsis
#3
Mengshi Chen, Xiulan Lu, Li Hu, Pingping Liu, Wenjiao Zhao, Haipeng Yan, Liang Tang, Yimin Zhu, Zhenghui Xiao, Lizhang Chen, Hongzhuan Tan
Pediatric sepsis is a burdensome public health problem. Assessing the mortality risk of pediatric sepsis patients, offering effective treatment guidance, and improving prognosis to reduce mortality rates, are crucial.We extracted data derived from electronic medical records of pediatric sepsis patients that were collected during the first 24 hours after admission to the pediatric intensive care unit (PICU) of the Hunan Children's hospital from January 2012 to June 2014. A total of 788 children were randomly divided into a training (592, 75%) and validation group (196, 25%)...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28511848/intense-resistance-exercise-increases-peripheral-brain-derived-neurotrophic-factor
#4
Kieran J Marston, Michael J Newton, Belinda M Brown, Stephanie R Rainey-Smith, Sabine Bird, Ralph N Martins, Jeremiah J Peiffer
OBJECTIVES: Brain-derived neurotrophic factor (BDNF) has been shown to increase in an intensity dependent manner in response to aerobic exercise. However, previous research investigating the use of resistance exercise to increase BDNF levels has been less conclusive, likely due to the low intensity nature of traditional resistance exercise programs. This study examined the influence of acute resistance exercise to-fatigue on serum BDNF levels and blood lactate. DESIGN: Acute crossover study...
March 21, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28503530/caffeine-supplementation-affects-the-immunometabolic-response-to-concurrent-training
#5
Fabrício Eduardo Rossi, Valéria Leme Gonçalves Panissa, Paula Aulves Monteiro, José Gerosa-Neto, Érico Chagas Caperuto, Jason Michael Cholewa, Alessandro Moura Zagatto, Fábio Santos Lira
The aim of the present study was to investigate the effects of caffeine (CAF) and carbohydrate (CHO) intake on strength performance and its metabolic and inflammatory responses during concurrent training. Seven active males ingested a double-placebo (P), CAF (capsule 5 mg/kg) or CHO (20% maltodextrin solution) supplementation before strength exercise. Participants performed three randomized sessions of 5,000-m high-intensity intermittent aerobic exercise at maximal intensity followed by strength exercise, performing after the P, CHO, and CAF intake...
April 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/28501968/effect-of-parachute-jump-in-the-psychophysiological-response-of-soldiers-in-urban-combat
#6
Joaquín Sánchez-Molina, José J Robles-Pérez, Vicente J Clemente-Suárez
The study of organic and psychological response during combat situations has been poorly reported despite its importance for soldiers training and specific instruction, so it was proposed as aim of the present investigation to analyze the effect of a tactical parachute simulated jump in psycho-physiological response of paratroopers' warfighters during an urban combat simulation. 19 male paratroopers (31.9 ± 6.2 year old; 173.6 ± 5.3 cm; 73.8 ± 8.3 Kg) of the Spanish Army were divided in two groups: parachute jump group (n:11) that conducted a simulated parachute jump and a urban combat maneuver and a non-parachute jump group (n:8) that only conducted an urban combat maneuver...
June 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28499979/inspiratory-muscle-training-improves-intercostal-and-forearm-muscle-oxygenation-in-patients-with-chronic-heart-failure-evidence-of-the-origin-of-the-respiratory-metaboreflex
#7
Adalgiza M Moreno, Alessandra C Toledo-Arruda, Jéssica S Lima, Carolina S Duarte, Humberto Vilacortta-Junior, Antonio C L Nóbrega
BACKGROUND: The impact of inspiratory muscle training (IMT) on respiratory and peripheral muscle oxygenation and perfusion during inspiratory muscle fatigue in patients with chronic heart failure has not been established. METHODS AND RESULTS: Twenty-six patients with chronic heart failure were randomly assigned to either 8 weeks of IMT or to a control group. Inspiratory fatigue was induced by a progressive inspiratory resistive loading protocol until there was an inability to sustain inspiratory pressure, when the inspiratory muscle metaboreflex should be activated...
May 9, 2017: Journal of Cardiac Failure
https://www.readbyqxmd.com/read/28495846/dispelling-the-myth-that-habitual-caffeine-consumption-influences-the-performance-response-to-acute-caffeine-supplementation
#8
Lívia de Souza Gonçalves, Vitor de Salles Painelli, Guilherme Yamaguchi, Luana Farias de Oliveira, Bryan Saunders, Rafael Pires da Silva, Erika Maciel, Guilherme Giannini Artioli, Hamilton Roschel, Bruno Gualano
OBJECTIVE: To investigate the influence of habitual caffeine intake on exercise performance to acute caffeine supplementation. METHODS: A double-blind, crossover, counterbalanced study was performed. Forty endurance-trained cyclists were allocated into tertiles according to their daily caffeine intake: low (58 ± 29 mg(.)d(-1)), moderate (143 ± 25 mg(.)d(-1)), and high consumers (351 ± 139 mg(.)d(-1)). Participants completed three trials in which they performed simulated cycling time-trials in the fastest time possible following ingestion of: caffeine (CAF: 6 mg(...
May 11, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28493819/the-choice-of-freely-preferred-cadence-by-trained-nonprofessional-cyclists-may-not-be-characterized-by-mechanical-efficiency
#9
Yitzhak Weinstein, Ron Mor-Unikowski, Shachar Nice, Shraga Hocherman, Omri Inbar
BACKGROUND: Most cycling studies involve professional cyclists. Because training may affect riding style, it is of interest to determine the physiological basis for the personal choice of cycling cadence in nonprofessional cyclists. METHODS: Eleven nonprofessional (5.2±1.7-year-riding experience) male road cyclists, aged 35.0±11.0 years, underwent four separate laboratory test sessions. The first two sessions included habituation, anthropometry, V˙O2max,$\dot V{{\text{O}}_{\text{2}}}{\text{max}},$ and lactate threshold (LaTH) measurements...
May 11, 2017: Journal of Basic and Clinical Physiology and Pharmacology
https://www.readbyqxmd.com/read/28488828/effects-of-active-recovery-during-interval-training-on-plasma-catecholamines-and-insulin
#10
Harutiun M Nalbandian, Zsolt Radak, Masaki Takeda
BACKGROUND: Active recovery has been used as a method to accelerate the recovery during intense exercise. It also has been shown to improve performance in subsequent exercises, but little is known about its acute effects on the hormonal and metabolic profile. The aim of this research was to study the effects of active recovery on plasma catecholamines and plasma insulin during a high-intensity interval exercise. METHODS: 7 subjects performed two high-intensity interval training protocols which consisted of three 30 s high-intensity bouts (constant intensity), separated by a recovery of 4 minutes...
May 9, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28488826/soccer-training-high-intensity-interval-training-is-mood-disturbing-while-small-sided-games-ensure-mood-balance
#11
Okba Selmi, Monoem Haddad, Lina Majed, Wissam Ben Khalifa, Marzougui Hamza, Karim Chamari
BACKGROUNDː The aim of the study was to compare the effects of high-intensity intermittent training (HIIT) versus small-sided games (SSG) in soccer on both the physiological responses and the mood state of players. METHODS: Sixteen professional soccer players took part in the study (age: 24.1±0.9 years). Testing of players was conducted on separate days in a randomized and counter-balanced order (each training session: 28-min: 4x4 minutes work with 3-min of passive recovery in-between)...
May 9, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28486334/aerobic-exercise-supplemented-with-muscular-endurance-training-improves-onset-of-blood-lactate-accumulation
#12
John W Farrell, David J Lantis, Carl J Ade, Greg S Cantrell, Rebecca D Larson
Studies have shown that when aerobic exercise is supplemented with muscular endurance training metabolic adaptions occur that result in the delay of the onset of blood lactate accumulation (OBLA). However, previous studies have not explored any submaximal cardiorespiratory adaptations that may result from this training protocol. The aim of the current investigation was to evaluate the effect of supplementing an aerobic exercise training program with a muscular endurance training program on various cardiorespiratory and metabolic measurements...
May 5, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28479950/the-effects-of-a-10-day-altitude-training-camp-at-1828-meters-on-varsity-cross-country-runners
#13
Sebastian R Diebel, Ian Newhouse, David S Thompson, Vineet B K Johnson
Altitude training has been shown to alter blood lactate (BL) levels due to alterations resulting from acclimatization. This study aims to estimate the impact of altitude training on BL changes immediately following an incremental treadmill test and during recovery before and after 10-day altitude training at approximately 1828 meters. Eight varsity cross-country runners performed an incremental treadmill test (ITT), pre and post-altitude training. Resting and post-warm-up BL values were recorded. During ITT, heart rate (HR), oxygen saturation (SpO2), and time to exhaustion were monitored...
2017: International Journal of Exercise Science
https://www.readbyqxmd.com/read/28474871/effects-of-hydrogen-rich-water-on-prolonged-intermittent-exercise
#14
Alessandro DA Ponte, Nicola Giovanelli, Daniele Nigris, Stefano Lazzer
BACKGROUND: Recent studies showed a positive effect of Hydrogen Rich Water (HRW) intake on acid-basic homeostasis at rest. We investigated 2-weeks of HRW intake on repeated sprint performance and acid-base status during prolonged intermittent cycling exercise. METHODS: In a cross over single-blind protocol, eight trained male cyclists (age [mean ± SD] 41±7 years, body mass 72.3±4.4 kg, height 1.77±0.04 m, maximal oxygen uptake [V̇ O2max] 52.6±4.4 ml·kg-1·min-1) were provided daily with 2 liters of placebo normal water (PLA, pH 7...
April 26, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28474868/effects-of-drop-set-resistance-training-on-acute-stress-indicators-and-long-term-muscle-hypertrophy-and-strength
#15
Julius Fink, Brad J Schoenfeld, Naoki Kikuchi, Koichi Nakazato
BACKGROUND: We investigated the effects of 2 different resistance training (RT) protocols on muscle hypertrophy and strength. The first group (n = 8) performed a single drop set (DS) and the second group (n = 8) performed 3 sets of conventional RT (normal set, NS). METHODS: Eight young men in each group completed 6 weeks of RT. Muscle hypertrophy was assessed via magnetic resonance imaging (MRI) and strength via 12 RM tests before and after the 6 weeks. Acute stress markers such as muscle thickness (MT), blood lactate (BL), maximal voluntary contraction (MVC), heart rate (HR) and rating of perceived exertion (RPE) before and after one bout of RT...
April 26, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28471441/how-to-assess-hemodynamic-status-in-very-preterm-newborns-in-the-first-week-of-life
#16
G Escourrou, L Renesme, E Zana, A Rideau, M O Marcoux, E Lopez, G Gascoin, P Kuhn, P Tourneux, I Guellec, C Flamant
BACKGROUND: Assessing hemodynamic status in preterm newborns is an essential task, as many studies have shown increased morbidity when hemodynamic parameters are abnormal. Although oscillometric monitoring of arterial blood pressure (BP) is widely used due to its simplicity and lack of side effects, these values are not always correlated with microcirculation and oxygen delivery. OBJECTIVES: This review focuses on different tools for the assessment of hemodynamic status in preterm newborns...
May 4, 2017: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/28470361/use-of-biotechnology-devices-to-analyse-fatigue-process-in-swimming-training
#17
V J Clemente-Suárez, J J Arroyo-Toledo
The aim of the present research was to analyze the acute psycho-physiological response during a high intensity interval training (HIIT) session of trained swimmers. We analyzed blood lactate concentration, heart rate, heart rate variability (HRV), arms isometric strength, rating of perceived exertion (RPE) and cortical arousal before and after a HIIT session in 14 trained swimmers (16.2 ± 2.6 years 169.1 ± 10.2 cm 61.3 ± 9.9 kg). HIIT session consisted in: 4 × 10 m tethered swimming resting 90 s between sets, 3 min rest, 16 × 25 m maximum speed swimming resting 30 s between sets...
June 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28469752/il-6-antioxidant-capacity-and-muscle-damage-markers-following-high-intensity-interval-training-protocols
#18
Lukas Cipryan
The aim of this study was to investigate changes of interleukin-6 (IL-6), total antioxidant capacity (TAC) and muscle damage markers (creatine kinase (CK), myoglobin and lactate dehydrogenase (LDH)) in response to three different high-intensity interval training (HIIT) protocols of identical external work. Twelve moderately-trained males participated in the three HIIT trials which consisted of a warm-up, followed by 12 min of 15 s, 30 s or 60 s HIIT sequences with the work/rest ratio 1. The biochemical markers of inflammation, oxidative stress and muscle damage were analysed POST, 3 h and 24 h after the exercise...
February 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28469751/physiological-acute-response-to-high-intensity-intermittent-and-moderate-intensity-continuous-5-km-running-performance-implications-for-training-prescription
#19
Carolina Cabral-Santos, José Gerosa-Neto, Daniela S Inoue, Fabrício E Rossi, Jason M Cholewa, Eduardo Z Campos, Valéria L G Panissa, Fábio S Lira
The aim of this study was to investigate the physiological responses to moderate-intensity continuous and high-intensity intermittent exercise. Twelve physically active male subjects were recruited and completed a 5-km run on a treadmill in two experimental sessions in randomized order: continuously (70% sVO2max) and intermittently (1:1 min at sVO2max). Oxygen uptake, excess post-exercise oxygen consumption, lactate concentration, heart rate and rating of perceived exertion data were recorded during and after each session...
February 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28467493/p38-mapk-activation-and-h3k4-trimethylation-is-decreased-by-lactate-in-vitro-and-high-intensity-resistance-training-in-human-skeletal-muscle
#20
Lena Willkomm, Sebastian Gehlert, Daniel Jacko, Thorsten Schiffer, Wilhelm Bloch
Exercise induces adaptation of skeletal muscle by acutely modulating intracellular signaling, gene expression, protein turnover and myogenic activation of skeletal muscle stem cells (Satellite cells, SCs). Lactate (La)-induced metabolic stimulation alone has been shown to modify SC proliferation and differentiation. Although the mechanistic basis remains elusive, it was demonstrated that La affects signaling via p38 mitogen activated protein kinase (p38 MAPK) which might contribute to trimethylation of histone 3 lysine 4 (H3K4me3) known to regulate satellite cell proliferation and differentiation...
2017: PloS One
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