Victor Cuadrado

Universidad Autónoma de Madrid | UAM · Departamento de Educación Física, Deporte y Motricidad Humana

Beach handball (BH) is characterized by high-intensity actions, such as accelerations and short rest times, in combination with long periods of low-intensity activity during a match. The purpose of this study was to establish a comparative analysis between the effect of a hard surface vs. sandy surface on the properties of the sprint Force–Velocity...

Training systems based on high-intensity interval training (HIIT) have experienced great influence in recent years within the context of exercise and sport. This study aims to provide insight on whether the immediate outcomes (e.g., central and peripheral acute responses) may be intensified or attenuated when a HIIT protocol is performed using a FF...

Introduction: The implementation of optimal sprint training volume is a relevant component of team sport performance. This study aimed to compare the efficiency and effectiveness of two different configurations of within-season training load distribution on sprint performance over 6 weeks. Methods: Twenty male professional FH players participate...

Considering the existing controversy over the possible role of acute antioxidant vitamins in reducing exercise-induced muscle damage (EIMD), this doubled-blind, randomized and controlled trial aimed to determine whether supplementation with vitamins C and E could mitigate the EIMD in endurance-trained runners (n = 18). The exercise protocol involve...

Spatial navigation is a key aspect of human behavior and it is still not completely understood. A number of experimental approaches exist, although most of the published data in the last decades have relied on virtual maze on-screen simulation or not-completely freely moving 3D devices. Some interesting recent developments, such as circular mazes,...

The aim of the present study was to determine the influence of maturation status on the components of the sprint force-velocity (F-V) profile in young soccer players. Sixty-two male young soccer players from the same professional soccer academy took part in the present study. A cross-sectional design was implemented to compare the main components o...

This study aimed to compare sprint, jump performance, and sprint mechanical variables between endurance-adapted milers (EAM, specialized in 1500–3000-m) and speed-adapted milers (SAM, specialized in 800–1500 m) and to examine the relationships between maximal sprint speed (MSS), anaerobic speed reserve (ASR), sprint, jump performance, and sprint me...

The aim was to determine the relationships among components of the force-velocity (F-V) profiles in jumping and sprinting, with both biological and chronological ages in 89 young soccer players belonging to categories from U10 to U18. Participants performed countermovement jumps (CMJ) and 20-m sprint tests. F-V components assessed were associated w...

Strength and conditioning specialists commonly deal with the quantification and selection the setting of protocols regarding resistance training intensities. Although the one repetition maximum (1RM) method has been widely used to prescribe exercise intensity, the velocity-based training (VBT) method may enable a more optimal tool for better monito...

The aim was to compare pacing, biomechanical and perceptual responses between elite speed-and endurance-adapted milers during a sprint interval training session (SIT). Twenty elite and world-class middle-distance runners (male: n = 16, female: n = 4; 24.95 ± 5.18 years; 60.89 ± 7 kg) were classified as either speed-or endurance-adapted milers accor...

This study aimed to describe the seasonal changes in the sprint force-velocity (Fv) profile of professional soccer players. The sprint Fv profile of 21 male soccer players competing in the first division of the Spanish soccer league was evaluated 6 times: preseason 1 (September 2015), in-season 1 (November 2015), in-season 2 (January 2016), in-seas...

This study aimed (i) to explore the relationship between vertical (jumping) and horizontal (sprinting) force–velocity–power (FVP) mechanical profiles in a large range of sports and levels of practice, and (ii) to provide a large database to serve as a reference of the FVP profile for all sports and levels tested. A total of 553 participants (333 me...

Database of force-velocity profile from horizontal and vertical modalities in various sports modalities, level and sex. F0, theoretical maximal force; v0, theoretical maximal velocity; Pmax, theoretical maximal power; LL, low level or amateur; ML, medium level or semi-professional; HL, high level or professional; EL, elite level or international.

This study analysed the acute mechanical and metabolic responses to a sprint training session focused on maintaining maximal speed until a given speed loss was reached. Nine male high-level sprinters performed 60 m running sprints up to a 3% in speed loss with 6 min rests between sets. Mechanical responses (countermovement jump (CMJ) height and spe...

Purpose:: This study aimed to compare the sprint mechanical force-velocity (F-V) profile between soccer and futsal players. A secondary aim was, within each sport, to study the differences in sprint mechanical F-V profile between sexes and players of different levels. Methods:: 102 soccer players (63 men) and 77 futsal players (49 men) that were...

Purpose: The aims of this study were (I) to quantify the magnitude of the association between the same variables of the force-velocity (FV) profile and the performance variables (unloaded squat jump [SJ] height and 20 m sprint time) obtained during the jumping and sprinting testing procedures, and (II) to determine which mechanical capacity (i.e.,...

This chapter determines the main competences of the university professor, the values that can be transmitted in the implementation of these competences and a proposal of practical strategies, based on each of the values raised. All of these variables (competencies, values and strategies) have been validated through expert judgment, through Aiken's...

This study aimed to analyze various fitness qualities in handball players of different ages, and to determine the relationships between these parameters and throwing velocity. Forty-four handball players participated, pooled by age groups: ELITE (n = 13); under-18 (U18, n = 16); under-16 (U16, n = 15). The following tests were completed: 20-m runni...

The purpose of this study was to assess validity and reliability of sprint performance outcomes measured with an iPhone application (named: MySprint) and existing field methods (i.e. timing photocells and radar gun). To do this, 12 highly trained male sprinters performed 6 maximal 40-m sprints during a single session which were simultaneously timed...

AIM: Ballistic performances, notably jumping, are key factors in many sport activities. They are mostly determined by the maximal power (Pmax) that lower limbs can generate but also by the individual Force-velocity (F-v) mechanical profile characterizing the ratio between maximal force and maximal unloaded extension velocity capabilities. An indivi...

This study aimed to analyze perceptual, metabolic and mechanical responses to sprint training sessions. 9 male high-level sprinters performed 40 m running sprints up to a loss of 3% in speed, with 4 min rests between sets. Perceptual (rating of perceived exertion, RPE), mechanical (speed and countermovement jump height loss) and metabolic (blood la...

Purpose: 1) to analyze the reliability and validity of a simple computation method to evaluate force (F), velocity (v) and power (P) output during a countermovement jump (CMJ) suitable for use in field conditions; and 2) to verify the validity of this computation method to compute the CMJ Force-velocity (F-v) profile (including unloaded and loaded...

Introduction: One of the main problems faced by strength and conditioning coaches is the issue of how to objectively quantify and monitor the actual training load undertaken by athletes in order to maximize performance. It is well known that performance of explosive sports activities is largely determined by mechanical power. Objective: This study...

The aim of this study is to examine the relationship between the relative load in full-squats and the height achieved in jump squat exercises, and to discover the load which maximizes the power output of high-level athletes. Fifty-one male high-level track and field athletes (age = 25.2 ± 4.4 years, weight = 77. ± 6.2 kg, height = 179.9 ± 5.6 cm) w...

PURPOSE: The aim of this study is to examine the relationship between the relative load in full-squats and the height achieved in jump squat exercises, and to discover the load which maximizes the power output of high-level athletes. METHOD: Fifty-one male high-level track and field athletes (age = 25.2 ± 4.4 years, weight = 77. ± 6.2 kg, height =...

This study analysed the acute metabolic and mechanical responses to a specific Repeated Sprint Ability (RSA) test. Eighteen male professional soccer players from a team of the First Division of Spanish National League participated. A 12x30m RSA test with 30 s recovery together with countermovement jump test (CMJ) pre a post RSA test was performed....

Introduction: Sprints, jumps and kicking are considered relevant factors for successful performance and widely related to strength. Traditionally, the training protocols used for increasing strength training consisted in a set of exercises in which athletes lifted heavy weights (nearly 1RM) with difficulties for considering the real effort of athle...

A simple method for evaluating force (F), velocity (V) and power (P) output during a squat jump (SJ) was validated by Samozino et al. (2008, J Biomech, 41: 2940–5), who also showed the existence of an optimal force-velocity profile during SJ (2012, MSSE, 44(2):313–22). Counter Movement Jump (CMJ) is a very common test in sports training and testing...

Purpose To study the effect of a countermovement on the lower limb force–velocity (F–v) mechanical profile and to experimentally test the influence of F–v mechanical profile on countermovement jump (CMJ) performance, independently from the effect of maximal power output (P max). Methods Fifty-four high-level sprinters and jumpers performed vertical...

Introduction In response to the need to adjust training loads of sprinters in speed sessions, caused by great variability in the number of series that coaches use and ignorance about how many series realize, when to stop training or what tool to use to control optimally speed session training, was carried out this study, in which we tried to approa...

Introduction The study of training load´s dose always has provoked controversies and there is not solved which is the optimal training load to achieve the highest performance (Cronin and Sleivert, 2005). Most studies analyse the training's immediate effects without a scientific evidence exists, in many cases, on the most suitable loads and their ef...

In response to the need to adjust training loads of sprinters in speed sessions, due to the large variability in the number of repetitions that coaches use and their ignorance of how many repetitions to execute, when to stop training, or what tools to use to optimally monitor speed session training, this study was carried out, in which we assess th...

Power output is acknowledged as an indicator of physical condition for athletes. Vertical jump height is a good predictor of muscle strength (power output), and therefore several types of vertical jump tests have been used to evaluate athletic performance. The aimof this study was to analyse the relationship between jumping and acceleration abiliti...

Knowledge of acute effects of training load in sprint training sessions is essential for improving performance. The ultimate goal of training is to prepare athletes to perform at their best at important competitions. Therefore, it´s a need the training load´s individualization for sprint training. PURPOSE: To analyze the acute metabolic and mechani...