Daniel A. Boullosa

Universidad de León | UNILEON · Faculty of Physical Activity and Sports Sciences

Purpose: The purpose of this study was to evaluate changes in autonomic control of heart rate (HR) and fitness in a group of elite soccer players during the preseason. Methods: Eight professional male soccer players competing in the Spanish First Division were evaluated in July (wk 1) and September (wk 8) with night-time HR variability (HRV) ove...

While there is strong support of the usefulness of post-activation potentiation (PAP) phenomenon in power demanding sports, the role that PAP could play in endurance sports has received less attention. The aim of this review is to present evidence for a better understanding of PAP in endurance athletes; and to discuss the physiological basis and me...

This study aimed to: 1) investigate the influence of a 2-weeks sprint interval training (SIT) program on aerobic capacity, cardiac autonomic control and components of attention in young healthy university students; and 2) to ascertain whether training fidelity would influence these adaptations. One hundred and nine participants were divided into an...

The effects of short sprint interval training (sSIT) with efforts of ≤10 seconds on maximal oxygen consumption (V̇O2max), aerobic and anaerobic performances remain unknown. To verify the effectiveness of sSIT in physically active adults and athletes, a systematic literature search was conducted according to the Preferred Reporting Items for Systema...

Purpose: Monitoring is a fundamental part of the training process to guarantee that the programmed training loads are executed by athletes and result in the intended adaptations and enhanced performance. A number of monitoring tools have emerged during the last century in sport. These tools capture different facets (eg, psychophysiological, physic...

The concept of motivation states for physical activity and sedentarism emerged from ideas emanating from addiction medicine, self-control research, and exercise psychology. To start, Robinson and Berridge's theory of incentive salience, which seeks to understand urges and cravings for addictive substances, differentiates the notions of liking versu...

Motivation states for physical activity and sedentarism potentially vary from moment to moment. The CRAVE scale (Cravings for Rest and Volitional Energy Expenditure) was developed to assess transient wants and desires to move. Three studies were conducted with the aims of: (1) translating and validating the scale in Brazilian Portuguese, (2) examin...

We investigated the consistency of metrics obtained from the unweighting, braking, propulsive, and landing phases of the countermovement (CMJ) force-time curve in combat fighters and physically active men. Combat fighters (n=21) and physically actives (n=21) were tested for three days (2-7 days apart). Participants performed four maximal CMJ separa...

Background: The aim of the present study was to compare the effects of active (AR) vs. passive recovery (PR) between two Wingate Anaerobic Tests (WAnT) on power output, blood lactate (BLa) and oxygen consumption (VO2) in a second WAnT. Methods: Twelve well-trained cyclists underwent three experimental sessions. In the first session, they complet...

We aimed to compare differences in performance and pacing variability indices between 5000 m heats and finals during major championships in men and women. Data with 100 m time resolution were used to compare overall pacing variability (standard deviation of 100 m section times, SD; and coefficient of variation, CV%) and short-term pacing variabilit...

PURPOSE: The purpose of this study is to examine longitudinal responses in motivation states with the new ARGE scale. Due to their transitory nature, we hypothesize that motivation states measured before exercise sessions will have little correspondence. However, responses following sprint sessions should have greater correspondence. METHODS: The s...

Editorial of the Special Issue: Advances in Nutrition, Dietary Supplements and Ergogenic Aids for Athletic Performance. This special issue belongs to the section "Sports Nutrition".

Multidirectional jumping and repeated sprint ability are crucial performance factors in basketball. The aim of this investigation was to examine the neuromuscular performance and body balance adaptations following basketball-specific combined training programs based on drop jump and multidirectional repeated sprint versus multidirectional plyometri...

The full text of the paper is freely accessible here: https://journals.humankinetics.com/view/journals/ijspp/aop/article-10.1123-ijspp.2023-0132/article-10.1123-ijspp.2023-0132.xml

Weight loss is a major motive for engaging in exercise, despite substantial evidence that exercise training results in compensatory responses that inhibit significant weight loss. According to the Laws of Thermodynamics and the CICO (Calories in, Calories out) model, increased exercise-induced energy expenditure (EE), in the absence of any compensa...

Purpose: This study aimed to (1) evaluate the acute effects of different interrepetition rest full-squat protocols on countermovement jump (CMJ) height, velocity loss (VL), and skin temperature (Tsk) and (2) determine whether the VL, the changes in Tsk, or the individual strength level is associated with the change in CMJ height. Methods: Sixtee...

Introduction: Motivation to be physically active and sedentary is a transient state that varies in response to previous behavior. It is not known: (a) if motivational states vary from morning to evening, (b) if they are related to feeling states (arousal/hedonic tone), and (c) whether they predict current behavior and intentions. The primary purpo...

Scientific interest in pacing goes back >100 years. Contemporary interest, both as a feature of athletic competition and as a window into understanding fatigue, goes back >30 years. Pacing represents the pattern of energy use designed to produce a competitive result while managing fatigue of different origins. Pacing has been studied both against t...

Background Interval training (IT) is influenced by several variables and its design. However, there is no consensus about the acute effects of this type of training on running kinematics and gait patterns due to the variety of session designs. Research question The aim of this systematic review was to determine the acute effects of IT on gait patt...

Motivation for physical activity and sedentary behaviors (e.g., desires, urges, wants, cravings) varies from moment to moment. According to the WANT model, these motivation states may be affectively-charged (e.g., felt as tension), particularly after periods of maximal exercise or extended rest. The purpose of this study was to examine postulates o...

Background: It is well-documented that listening to music has the potential to improve physical performance during intense physical exercise. Less information is available on the timing of music application. This study aimed to investigate the effects of listening to preferred music during the warm up of a subsequent test or during the test on perf...

Abstract Background It is well-documented that listening to music has the potential to improve physical performance during intense physical exercise. Less information is available on the timing of music application. This study aimed to investigate the effects of listening to preferred music during the warm up of a subsequent test or during the test...

This study was performed to determine the impact of sex and sport-discipline on physical fitness and bone markers in young sub-elite track and field athletes. One hundred and forty-four track and field sub-elite athletes (78 males aged 17.8 ± 1.6 years; 66 females aged 17.2 ± 1.9 years) volunteered to participate in this study and were categorized...

The current evidence suggests that pacing may not be affected by performance level or sex in trail-running races as may occur in road running races. However, the previous studies included races of >100 km. Therefore, we aimed to verify the influence of performance level and sex on pacing in the last four (2017, 2018, 2019, and 2021) editions of a s...

We analyzed work capacity, cardiometabolic, perceptual, and neuromuscular responses to an aerobic interval training (AIT) running session until exhaustion, with active (AR) vs. passive recovery (PR). Eight well-trained male endurance runners (36.88 ± 7.14 years, 58.22 ± 3.39 ml·kg−1·minute−1) randomly completed, after familiarizations and the Unive...

This study aimed to verify the time course recovery of muscle edema within the quadriceps femoris and functional performance after lower-body single- and multi-joint exercises. For this within-participant unilateral and contralateral experimental design, fourteen untrained young males performed a unilateral knee extension exercise (KE), and a unila...

While the scientific community generally agrees about what is considered the highest level of evidence, sport scientists with experience in both the field and in academia understand perfectly well that all the glitters is not gold.1 As an example, I have seen several times how the conclusions of a systematic review with meta-analysis changed dramat...

This manuscript includes analyses for the single-item subscales of the CRAVE scale (Cravings for Rest and Volitional Energy Expenditure) and the new adaptation in Brazilian Portuguese - the ARGE. The translation and validation of this new scale is described. Lastly, we gave the scale to 9 women with depression, who completed the regular, 13-item sc...

[NOTE: Version2 has a corrected caption for Figure 4.] We believe that this is the first analysis to find that motivation to move and be physically active is like a circadian curve or a biorhythm. We also demonstrate that motivation states to move and rest (be sedentary) are highly associated with arousal/activation or how "worked up" one feels. Af...

Introduction: Post-activation potentiation enhancement (PAPE) often results from the inclusion of high-intensity, conditioning activity during warm-up. The majority of PAPE studies to date have incorporated lower body resistance exercises (e.g. loaded squats) to examine PAPE on subsequent jumping and cycling performances. Very few studies have exam...

Purpose: To investigate differences in athletes' knowledge, beliefs, and training practices during COVID-19 lockdowns with reference to sport classification and sex. This work extends an initial descriptive evaluation focusing on athlete classification. Methods: Athletes (12,526; 66% male; 142 countries) completed an online survey (May-July 2020...

In swimming, the beneficial effects of the in-water warm-up are often undermined by the long transition periods before competition (≥ 20 min). For that reason, studies comparing the effects of in-water warm-ups followed by dryland activities have been conducted in the swimming literature. This has brought conflicting evidence due to large combinati...

The main aim of the present study was to examine the effects of age group (U-15, U-17 and U-19) on change of direction (COD) performances and their specific physical determinants among young basketball male players. Thirty-one young male basketball players (13-18 years) volunteered for participation in this study. The sample was divided into 3 age...

Pacing behavior is typically described through graphical profiles and coefficient of variation (CV%) with respect to the mean speed of the race. Given that races during major championships are highly stochastic because of runners’ tactical behaviors, it may be valuable to use alternative methods to better describe and capture the occurrence of paci...

Abstract: Objective: to systematically search for randomized controlled trials comparing the effects of high-intensity interval training (HIIT) protocols vs. control without exercise or other exercise protocols, in patients with mental disorders experiencing depressive symptoms, and to provide some guidance based on the current HIIT literature to i...

Background Jumping and specific multidirectional repeated sprint ability are important in basketball. The objective of this study was to assess the contributions of 8-week combined versus single-mode training programs based on drop jump (DJ) and specific multidirectional repeated sprint (MRSA) on repeated sprint ability performances, body balance a...

Background Several studies have examined the effect of creatine monohydrate (CrM) on indirect muscle damage markers and muscle performance, although pooled data from several studies indicate that the benefits of CrM on recovery dynamics are limited. Objective This systematic review and meta-analysis determined whether the ergogenic effects of CrM...

This protocol is uploaded to ResearchGate for the Project HYPER study kickoff event - July 9, 2022. The paper is "In Press". ABSTRACT: Motivation for bodily movement, physical activity and exercise varies from moment to moment. These motivation states may be "affectively-charged," ranging from instances of lower tension (e.g., desires, wants) to hi...

***** This poster has embedded links. ***** ABSTRACT. According to the WANT model (Stults-Kolehmainen et al., 2020), motivation for movement and rest varies moment to moment. To assess these motivation states, the CRAVE scale (Cravings for Rest and Volitional Energy Expenditure) was recently developed. The purpose of the current study is to validat...

***** This poster has functioning links embedded. ***** ABSTRACT: According to the WANT model, motivation for physical activity and sedentary behaviors (e.g., desires, urges, wants, and cravings) varies from moment to moment. Previous studies have shown changes with periods of maximal exercise or passive rest. The purpose of this study was to exam...

***** This poster has functioning links embedded. ***** ABSTRACT: Numerous investigations have surmised that the motivation to be physically active and/or sedentary is transient (i.e., a motivation state, such as a want, desire or urge) and varies throughout the day. However, we are aware of no study that has measured undulations in physical activi...

***** This poster has functioning embedded links. ***** ABSTRACT: The CRAVE scale (Stults-Kolehmainen et al., 2021) was developed to measure affectively-charged motivation states (ACMS) as conceptualized by the WANT model (Stults-Kolehmainen et al., 2020). This scale has 13 items, 10 of which are scored (5 each for move and rest subscales), while...

Incline and level running on treadmills have been extensively studied due to their different cardiorespiratory and biomechanical acute responses. However, there are no studies examining the performance determinants of outdoor running on hilly terrains. We aimed to investigate the influence of anthropometrics, muscle strength, and cardiorespiratory...

Purpose To compare cardio-metabolic, perceptual and neuromuscular responses to an aerobic interval training (AIT) run- ning session, with active (AR) vs. passive recovery (PR). Methods Eleven well-trained male distance runners (36.63 ± 6.93 years, 59.26 ± 5.27 mL·kg −1 ·min −1 , ⁓ 35 min in 10 km) completed the University of Montréal Track Test (UM...

Training intensity distribution is important to training program design. The zones 1 to 2 boundary can be defined by the Talk Test and the rating of perceived exertion. The zones 2 to 3 boundary can be defined by respiratory gas exchange, maximal lactate steady state, or, more simply, by critical speed (CS). The upper boundary of zone 3 is potentia...

Purpose. Exercise-associated muscle cramps (EAMC) are characterized by intense pain and involuntary contractions of a single muscle or muscle group. While EAMCs may occur during and after exercise, their precise aetiology remains unknown. However, there are some potential risk factors, as the workload of physical training previously performed. The...

The aim of this study was to investigate the effects of listening to preferred music during a warm up or exercise, on performance during a 6-min all-out exercise test (6-MT) in young adult males. Twenty-five healthy males volunteered to participate in this study. Following a within subject design, participants performed three test conditions (MDT:...

Background The aim of the investigation was to compare the occurrence of post-activation performance enhancement (PAPE) after drop jumps, or heavy sled towing, and the subsequent effect on repeated sprint ability (RSA). Methods Ten young basketball players (17 ± 1 yrs) performed, in randomized order, RSA test with changes of direction after a stan...

INTRODUÇÃO: O aumento de desempenho pós-ativação (Post-activation performance enhancement – PAPE) é uma melhora aguda no desempenho de exercícios físicos após uma atividade condicionante máxima ou submáxima. O PAPE tem sido associado a indivíduos treinados, e parece sofrer influência do nível de condicionamento e intensidade da atividade condiciona...

The aims of this study were to: 1) provide and compare the height achieved during Smith-machine (SM) and free-weight (FW) loaded jumps executed over a wide spectrum of loads (40-120% of body-mass [BM]); and 2) test the difference between loaded and unloaded squat jump (SJ) and countermovement jump (CMJ) attempts in ten highly-trained male sprinters...

Background: It is well known that exercise training has positive effects on both cardiac autonomic function and arterial stiffness (AS). However, it is not clear that which exercise training variables, intensity or volume, or both, play a crucial role in this regard. This study investigates the chronic effects of high-volume moderate-intensity trai...

This study aimed to compare the post-activation performance enhancement induced by successive drop-jumps performed on hard or sand surfaces in the sprint and jump performance of top-level sprinters. Athletes were tested on 2 occasions. On each visit they were allocated to one of the experimental protocols, which consisted of performing 2x5 drop-jum...

Purpose: The optimal power load is defined as the load that maximizes power output in a given exercise. This load can be determined through the use of various instruments, under different testing protocols. Specifically, the "optimum power load" (OPL) is derived from the load-velocity relationship, using only bar force and bar velocity in the powe...

The aims of the current study were to compare the pacing patterns of all-time 800 m, 1500 m and mile running world records (WRs) and to determine whether differences exist between sexes, and if 800 m and 1500 m WRs were broken during championship or meet races. Overall and lap times for men and women's 800 m, 1500 m, and mile WRs from World Athleti...

Objectives: Explore training-related knowledge, beliefs and practices of athletes and the influence of COVID-19-related lockdowns. Methods: Athletes [n = 12,526 classified: world-class (13%), international (21%), national (36%), state (24%), and recreational (6%)] completed an online survey (50 d; 17th May to 5th July 2020) exploring their trainin...

The objective of this study was to investigate the construct validity and reliability of a new Reactive multidirectional repeated sprinting test (RRSA5COD) in basketball players. Forty male basketball players were divided into 2 groups: Professional (PRO; n=20) and Semi-professional (SEMI; n=20). Participants completed Yo-Yo Intermittent Recovery T...

This systematic review and meta-analysis determined whether the ergogenic effects of branched-chain amino acids (BCAA) ameliorated markers of muscle damage and performance following strenuous exercise. In total, 25 studies were included, consisting of 479 participants (age 24.3 ± 8.3 years, height 1.73 ± 0.06 m, body mass 70.8 ± 9.5 kg, females 26....

Jumping performance (e.g., countermovement jump [CMJ]), as a measure of neuromuscular performance, has been suggested as an easy-to-use tool which simultaneously provides neuromuscular and metabolic information and, thereby, allows coaches to confidently monitor the status of their athletes during a workout. This hypothesis has been satisfactorily...

he efficiency index (Effindex) combines internal and external loads, and it has been considered a promising tool to evaluate physical fitness status. However, its real applicability and limitations have not been elucidated yet. To examine and discuss the findings from studies that used Effindex as a tool for the evaluation of physical fitness statu...

PURPOSE: Performance in running events, such as 1-Mile World Records (WR), depends both on having and effectively using energetic resources. Although often understood in terms of physiological capacity based on the Joyner model, the Critical Speed/D’ model is an alternative method of accounting for energetic capacity and use, based on prior perform...

Background: To the authors' knowledge, there have been no studies comparing the acute responses to "all out" efforts in concentric (isoinertial) vs. eccentric (isovelocity) cycling. Methods: After two familiarization sessions, 12 physically active men underwent the experimental protocols consisting of a 2-min warm-up and 8 maximal efforts of 5 s...

Big Data has real value when the veracity of the collected data has been previously identified. However, data veracity for load monitoring in professional soccer players has not been analyzed yet. This systematic review aims to evaluate the current evidence from the scientific literature related to data veracity for load monitoring in professional...

After being in the PhD world for more than a decade, I can honestly say that I do not understand very well the logic of publication based on rigor and originality. This contradiction started to build up in my early scholar years when one of my first papers was finally published in a reputed journal after having been rejected in 4 other low-ranked j...

Ultra-short race-pace training (USRPT) is a high-intensity training modality used in swimming for the development of the specific race-technique. However, there is little information about the fatigue associated to this modality. In a crossover design, acute responses of two volume-equated sessions (1000-m) were compared on 14 national swimmers: i)...