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Publications (165)
Purpose
To evaluate the agreement between the two Gas Exchange Thresholds (GETs = GET1 and GET2), identified by the conventional V-Slope method, and two Respiratory Frequency Thresholds (f R Ts = f R T1 and f R T2) obtained from a novel, low-cost, and simple method of breakpoint determination.
Methods
Fifty middle-aged males (age: 50–58 years; $$\...
This study aimed to investigate the applicability of the Lactate Threshold (LT) to predict maximal oxygen uptake (V̇O2max) and demarcate the boundary between the moderate- to heavy-intensity domain (HRm-h) in old age in comparison to the most utilized methods. A cross-sectional validation study was conducted. Participants aged 61 to 77 performed a...
Inertial Measurement Units (IMUs) measure trunk-acceleration variables related to both running performances and rehabilitation purposes. This study examined both the reliability and sex-based differences of these variables during incremental treadmill running test. Eighteen endurance runners performed a test-retest on different days, and thirty run...
Objectives
To examine 1) the contribution of physiological performance variables to Olympic-distance (OD) triathlon performance, and 2) the links between an 8-wk intensified training plus competition preceding the main OD triathlon race and the changes in the physiological status in triathletes.
Study Design
An observational longitudinal study.
M...
Objectivesː To examine 1) the contributions of physiological performance variables to Olympic-distance (OD) triathlon performance, and 2) the links between 8-wks intensified training plus competition preceding the main OD triathlon race and the changes in the physiological status in triathletes. Study Design: An observational longitudinal study. Me...
This report aims to generate an evidence-based debate of the Critical Power (CP), or its analogous Critical Speed (CS), concept. Race times of top Spanish runners were utilized to calculate CS based on three (1500-m to 5000-m; CS1.5-5km ) and four (1500-m to 10000-m; CS1.5-10km ) distance performances. Male running world records from 1000 to 5000-m...
We have read with great interest the review and exchange letters concerning the Maximal Metabolic Steady State (MMSS) recently published in the journal. The review criticized the definition of the Maximal Lactate Steady State intensity (MLSSint) and suggested that, rather than MLSSint, the Critical Power (CP) or its analogous Critical Speed (CS) sh...
How exercise intensity targets, calibrated according to oxygen consumption, relate to vertical impacts during weight-bearing exercise is currently unknown. The authors investigated the relationship between vertical peaks (VPs) and metabolic equivalents (METs) of oxygen consumption in 82 women during walking and running. The magnitude of VPs, measur...
We have read with interest the review written by Jones et al. (2019) published in a recent volume-issue (volume 7, issue 5) of the journal. The review covers all the fundamental methodological factors of both maximal lactate steady state (MLSS) and critical power (CP). Criticisms regarding MLSS intensity (MLSSint) determination are to some extent c...
This study aimed to investigate training-induced fitness changes and their relationship with training-competition load during half soccer season (18-wks). Training load [heart rate (HR) and ratings of perceived exertion (RPE)] and match time were monitored, including 108 training (3223 individuals) and 23 match sessions, in thirty-eight youth elite...
Purpose: The association between an overlooked classical Lactate Threshold (LT), named “Minimum Lactate Equivalent” (LEmin), with Maximal Lactate Steady State (MLSS) has been recently described with good MLSS prediction results in endurance-trained runners. This study aimed to determine the applicability of LEmin to predict MLSS in lower aerobic-co...
Purpose: The aim of this study was to compare the widely used accelerometer activity cut-points derived from the absolute moderate intensity recommendation (3‒6 METs), with relative intensity cut-points according to maximal cardiorespiratory fitness (46%‒63% V˙O2max) and to individual lactate thresholds (LT1 and LT2) in postmenopausal women. Method...
Introduction
The aim of this study was to demonstrate that the Lactate Threshold (LT), conceptually comprehended as in the old days (Owles, 1930), could be more accurate and functional method in comparison with the most common functional submaximal exercise field tests used for aerobic conditioning assessment and aerobic (either continuous or inter...
This study aimed to estimate the maximal lactate steady-state velocity (vMLSS) from non-invasive bloodless variables and/or blood lactate-related thresholds (BLRTs) measured during an Incremental submaximal Shuttle Test (IST), and to determine whether the addition of a Constant Velocity Test (CVT) could improve the estimation. Seventy-five postmeno...
Objetivo: demostrar que el umbral aeróbico (LT) puede ser un método valido y más práctico que los existentes para evaluar la condición aeróbica en la tercera edad.
Método: Participaron 12 individuos de 69 ± 5 años de edad que realizaron de manera aleatoria 1) 6-minutos-marcha (6MWT); 2) Shuttle 20-m continuo (SC20m) hasta el 90% de la frecuencia...
We have read with great interest the review written by D.Phil. Susan A. Ward published in a recent volume-issue (volume 118, issue 5) of the journal. Our main concern arises from the alternative validation approaches and their on-field clinical actual practical applications to control the quality of breath-by-breath systems´ measurements covered by...
Maximal Lactate Steady State (MLSS) and Lactate Threshold (LT) are physiologically-related and fundamental concepts within the sports and exercise sciences. Literature supporting their relationship, however, is scarce. Among the recognized LTs, we were particularly interested in the disused "Minimum Lactate Equivalent" (LEmin), first described in t...
Introducción Este estudio tuvo como objetivo validar el uso de una sola toma de lactato capilar medida tras 5' de carrera a 10 km·h-1 (BLC 10), y la velocidad asociada al 90% del pulso máximo (S 90) para predecir y facilitar la monitorización de los umbrales de concentraciones fijas de lactato (FBLC) en atletas de élite. Materiales y Métodos Se rea...
Context- The muscular function restoration related to the type of physical rehabilitation followed after anterior cruciate ligament reconstruction (ACLR) using autologous hamstring tendon graft in terms of strength and cross sectional area (CSA) remain controversial.
Objective- To analyze the CSA and force output of quadriceps and hamstring muscle...
This study aimed to predict the velocity corresponding to the maximal lactate steady state (MLSSV) from non-invasive variables obtained during a maximal multistage running field test (modified University of Montreal Track Test, UMTT), and to determine whether a single constant velocity test (CVT), performed several days after the UMTT, could estima...
This study aimed to validate the use of a single blood lactate concentration measure taken following a 12 km h(-1) running stage (BLC12) to predict and monitor fixed blood lactate concentration (FBLC) thresholds. Three complementary studies were undertaken. Study I: the relationships between BLC12 and the running speeds at FBLC of 3 mmol L(-1) (S3m...
The aim was to examine the drift in the measurements of fractional concentration of oxygen (FO2) and carbon dioxide (FCO2) of a Nafion-using metabolic cart during incremental maximal exercise in 18 young and 12 elderly males, and to propose a way in which the drift can be corrected. The drift was verified by comparing the pre-test calibration value...
This study aimed to predict the velocity corresponding to the maximal lactate steady state (MLSSV) from non-invasive variables obtained during an incremental maximal running test (University of Montreal Track Test, UMTT) and to determine whether a single constant velocity test (CVT), performed several days after the UMTT, could estimate the MLSSV....
To compare the effects of 12-week training periods (2 d·wk) involving resistance training only with the effects of 12-week training periods involving combined resistance (once weekly) and endurance (once weekly) training on strength, endurance performance, and quality of life.
Thirty-six patients with moderate-to-severe chronic obstructive pulmonar...
Persistent biomechanical and jumping capacity alterations have been observed among female athletes who have sustained anterior cruciate ligament (ACL) injuries. The purpose of this study was to examine if biomechanical jumping differences persist among a cohort of elite female handball players with previous ACL reconstruction several years after re...
Background: Handball is one of the most challenging sports for the knee joint. Persistent biomechanical and jumping capacity alterations can be observed in athletes with an anterior cruciate ligament (ACL) injury. Commonly identified jumping biomechanical alterations have been described by the use of laboratory technologies. However, portable and e...
Handball is one of the most challenging sports for the knee joint. Persistent biomechanical and jumping capacity alterations can be observed in athletes with an anterior cruciate ligament (ACL) injury. Commonly identified jumping biomechanical alterations have been described using laboratory technologies. However, portable and easy to handle techno...
The aim of this study was to investigate whether the speed associated with 90% of maximal heart rate (S90%HRmax) could predict speeds at fixed blood lactate concentrations of 3 mmol·L (S3mM) and 4 mmol·L (S4mM). Professional team-sport players of futsal (n = 10), handball (n = 16) and basketball (n = 10) performed a four-stage discontinuous progres...
Handball is one of the most challenging sports for the knee joint. Persistent strength and jumping capacity alterations may be observed among athletes who have suffered anterior cruciate ligament (ACL) injury.
To examine unilateral and bilateral jumping ability differences between previously ACL--reconstructed rehabilitated elite handball athletes...
This study investigated, in male professional players: 1) fluctuations in rating of local-muscular (sRPEmus) and central-respiratory (sRPEres) perceived exertion measured after the completion of each training and competitive session, over a 9 week competitive period, and 2) the influence of quantitative assessment of different training and competit...
Introduction
Anaerobic lactic thresholds (ATs) often occur at a mean intensity close to 90% of maximal heart rate (HRmax) (Hurley et al., 1984; Garcia-Tabar et al., 2013). Notwithstanding, whether the speed at a given percentage of HRmax (%HRmax) could be used as an endurance performance variable has never been investigated. The aim of this study w...
This study aimed to compare the effect on neuromuscular performance of 2 isoinertial resistance training programs that differed only in actual repetition velocity: maximal intended (MaxV) vs. half-maximal (HalfV) concentric velocity. 21 resistance-trained young men were randomly assigned to a MaxV (n=10) or HalfV (n=11) group and trained for 6 week...
Abstract The purpose of this study was to compare the effect on strength gains of two isoinertial resistance training (RT) programmes that only differed in actual concentric velocity: maximal (MaxV) vs. half-maximal (HalfV) velocity. Twenty participants were assigned to a MaxV (n = 9) or HalfV (n = 11) group and trained 3 times per week during 6 we...
To examine whether blood lactate and ammonia concentrations can be used to estimate the functional state of the muscle contractile machinery with regard to muscle lactate and ATP levels during leg press exercise. Thirteen men (age 34 ± 5 yr, 1RM leg press strength 199 ± 33 kg) performed either 5 sets of 10 repetitions to failure (5x10RF), or 10 set...
Introducción
Existen estudios que han investigado el efecto del entrenamiento de fuerza-máxima en el fútbol, pero pocos son los que han estudiado el del entrenamiento de fuerza-explosiva. El objetivo del presente estudio fue analizar los efectos en la altura de salto vertical con contra-movimiento (SCM) y en las adaptaciones hormonales cuando al en...
This study aimed to predict widely used aerobic threshold (AeT) and anaerobic lactate thresholds (AnTs) and other cycling performance variables from mathematically determined heart rate variability thresholds (HRVTs). Twelve male professional world-class road cyclists performed a continuous maximal graded cycling test. Blood lactate concentration (...
Background/aims:
A weight-loss diet alone or combined with a progressive resistance training program induced different adaptations on cardiometabolic risk, i.e. regional changes in visceral adipose tissue (VAT) and subcutaneous adipose tissue (SAT) volume distribution patterns. We hypothesized that a heterogeneous adipose tissue metabolism may exi...
Unlabelled:
Lifestyle changes such as following a hypocaloric diet and regular physical exercise are recognized as effective non-pharmacological interventions to reduce body fat mass and prevent cardiovascular disease risk factors.
Purpose:
To evaluate the interactions of a higher protein (HP) vs. a lower protein (LP) diet with or without a conc...
Lifestyle changes such as following a hypocaloric diet and regular physical exercise are recognized as effective non-pharmacological interventions to reduce body fat mass and prevent cardiovascular disease risk factors. Purpose: To evaluate the interactions of a higher protein (HP) vs. a lower protein (LP) diet with or without a concomitant progres...
This investigation examined the influence of the number of repetitions per set on power output and muscle metabolism during leg press exercise. Six trained men (age 34 ± 6 yr) randomly performed either 5 sets of 10 repetitions (10REP), or 10 sets of 5 repetitions (5REP) of bilateral leg press exercise, with the same initial load and rest intervals...
This study examined the effects of concurrent strength and endurance training on neuromuscular and endurance characteristics compared to strength or endurance training alone. Previously untrained men were divided into strength (S: n=16), endurance (E: n=11) or concurrent strength and endurance (SE: n=11) training groups. S and E trained 2 times and...
This study compared physical characteristics in a 2003 national elite female team (NE; n=16; fourth in the Spanish Championship) to the same team when it reached international level in 2009 (IE; n=14; winner of the Spanish Championship and the European Handball Cup). Body height, body mass, body fat, and fat free mass, one repetition maximum bench...
Muscle fatigue is a common experience in daily life. Many authors have defined it as the incapacity to maintain the required or expected force, and therefore, force, power and torque recordings have been used as direct measurements of muscle fatigue. In addition, the measurement of these variables combined with the measurement of surface electromyo...
The purpose of this study was to examine the changes in peak power output, blood lactate concentrations and surface electromyographic activity (sEMG) of the agonist [vastus lateralis (VL) and vastus medialis (VM)] and the antagonist [biceps femoris (BF)] muscles at two angular positions intervals (90-67° and 23-0° of knee flexion), during a set of...
Both strength and endurance training have several positive effects on aging muscle and physical performance of middle-aged and older adults, but their combination may compromise optimal adaptation. This study examined the possible interference of combined strength and endurance training on neuromuscular performance and skeletal muscle hypertrophy i...
Quantification of abdominal fat and its regional distribution has become increasingly important in assessing the cardiovascular risk.
To examine the effects of 16 weeks of a hypocaloric diet with a caloric restriction of 500 Kcal per day (WL) or the same dietary intervention plus resistance training (WL+RT) on regional variation of abdominal viscer...
this study examined the effects of heavy resistance training on the relationships between power loss and surface EMG (sEMG) indices and blood metabolite concentrations on dynamic exercise-induced fatigue with the same relative load as in pretraining.
twelve trained subjects performed five sets consisting of 10 repetitions in the leg press, with 2 m...
The purpose of this study was to investigate the sensitivity of new surface electromyography (sEMG) indices based on the discrete wavelet transform to estimate acute exercise-induced changes on muscle power output during a dynamic fatiguing protocol. Fifteen trained subjects performed five sets consisting of 10 leg press, with 2 min rest between se...
Information about anaerobic energy production and mechanical efficiency that occurs over time during short-lasting maximal exercise is scarce and controversial. Bilateral leg press is an interesting muscle contraction model to estimate anaerobic energy production and mechanical efficiency during maximal exercise because it largely differs from the...