Rodrigo Ramirez-Campillo

Universidad Andrés Bello | UNAB · Faculty of Rehabilitation Sciences

The purpose of this study is to examine the effects of different volume and training surfaces during a short-term plyometric training program on neuromuscular performance. Twenty-nine subjects were randomly assigned to four groups: control group (CG, n=5), moderate volume group (MVG, n=9, 780 jumps), moderate volume hard surface group (MVGHS, n=8,...

Purpose: The purpose of this intervention study was to investigate if a low-dose of plyometric training (PT) could improve sprint and jump performance in groups of different maturity status. Methods: Male youth field hockey players were divided into Pre-PHV (from -1 to -1.9 from PHV; Experimental: n = 9; Control = 12) and Mid-PHV (0 to +0.9 from...

Background. Upper-body plyometric training (UBPT) is a commonly used training method, yet its effects on physical fitness are inconsistent and there is a lack of comprehensive reviews on the topic. Objective. To examine the effects of UBPT on physical fitness in healthy youth and young adult participants compared to active, specific-active, and pas...

This study aimed to assess the test-retest reliability of untested single-and dual-beam timing gates and compare them with previously validated video-based applications to measure linear and change of direction sprint (CODS) times. Twenty-three participants were concurrently assessed for 30 m linear sprint and CODS time using single-and dual-beam t...

The purpose was to ascertain the effects of a 12-week intervention program based on exercises of mobility and dynamic strength on the stabilization of neck and trunk muscles in people with neck or low back pain according to gender. Forty-two subjects (n = 25 males and n = 17 females; age 49.62±8.82 years) with neck or low back pain completed a reco...

Introduction. This study aimed to investigate the effects of a six-week complex contrast training (CCT) intervention on the athletic performance of highly-trained amateur male soccer athletes during the pre-season period. Material and methods. Participants aged 21.3 years were randomized to CCT (n = 7) or active (i.e. standard soccer training) cont...

Background People with disabilities usually face barriers to regularly engaging in physical activities. Estimating physical activity patterns are necessary to elaborate policies and strategies to facilitate active lifestyles, considering the particular access difficulties experienced by this population.PurposeThis study aimed (i) to describe the pr...

Publication bias refers to a systematic deviation from the truth in the results of a meta-analysis due to the higher likelihood for published studies to be included in meta-analyses than unpublished studies. Publication bias can lead to misleading recommendations for decision- and policy-making. In this education review, we introduce, explain, and...

The objective of this systematic review with meta-analysis was to compare the endurance performance chronic adaptations induced by running-based high-intensity interval training (HIIT), small-sided games (SSGs), and combined HIIT+SSGs in male and female youth and adult soccer players. The studies included in this review followed the PICOS criteria:...

We systematically reviewed the effect of ambient temperature on football players’ performance during a football-specific fatigue protocol. Data sources: Cochrane Library, PubMed, Scopus, SPORTDiscus, Web of Science. Eligibility criteria followed the P.I.C.O.S. approach: (i) Healthy football players regardless of sex, age, or competitive level; (ii)...

The aim of this study was to quantify weekly internal workload across the in-season and compare the workload variables between starter and non-starter Spanish female first league (Liga Iberdrola) football players. Twenty-six participants belonging to the same team (age, height, and mass: 25.4 ± 6.1 years, 167.4 ± 4.8 cm and 57.96 ± 6.28 kg, respect...

Study aim : This study aimed to examine the effects of a six-week complex-contrast training (CCT) intervention on the physical fitness of male field hockey athletes. Material and methods: Participants were randomized into a CCT (n = 8) or control (CG; n = 6) group. Physical fitness was assessed pre- and post-six-week intervention using a 30 m linea...

Purpose: The aim of this study was to describe and compare the external loads response of elite female soccer players to different small-sided games (SSG). Twelve elite female soccer players (26.5 ± 5.7 years, 58.6 ± 5.6 kg, 164.4 ± 5.3 cm) performed four different 6vs6 SSG: two different sizes (20x20m and 30x30m) and with minigoals (MG) and withou...

The optimal intra-set rest for cluster sets (CLS) during plyometric-jump training (PJT) to improve physical fitness remains unclear. The objective of this quasi-experimental study was to compare the effects of PJT with traditional (TRS) vs. CLS structures, using different intra-set rests, on the physical fitness of healthy participants. Forty-seven...

Dear Editor, Due to the relevance of plyometric training for the strength and conditioning community and the exponential rise in the number of original research and systematic reviews on the topic, an umbrella review is needed, as it summarises findings from published meta-analyses which could meaningfully advance knowledge in this field of resear...

Background: Plyometric jump training (PJT) encompasses a range of different exercises that may offer advantages over other training methods to improve human physical capabilities (HPC). However, no systematic scoping review has analyzed either the role of the type of PJT exercise as an independent prescription variable or the gaps in the literatur...

This study aimed to compare the effects of two 8-week in-season strength-training programs on handball players’ physical and technical parameters. Thirty-six male athletes were randomly separated into three groups: a control group (n = 12), a plyometric training group (PG, n = 12), and an eccentric-overload training group (EG, n = 12). The PG and E...

Background It has previously been shown that drop jump height is an effective programming parameter in plyometric jump training. Less is known on the usage of maximal rebound jump height from a distinct drop height as a parameter for individualized plyometric jump training. Aim This study examined the effects of 8-weeks of two drop jump (DJ) train...

Anthropometric characteristics, including body size, shape, and composition, can have a significant impact on sports performance due to their influence on various physiological and biomechanical factors. However, limited research has been conducted on the anthropometric characteristics of highly trained throwing para-athletes. The purpose of this s...

Purpose: The aim of this study was to assess the interaction of kinematic, kinetic, and energetic variables as speed predictors in adolescent swimmers in the front-crawl stroke. Design: Ten boys (mean age [SD] = 16.4 [0.7] y) and 13 girls (mean age [SD] = 14.9 [0.9] y) were assessed. Methods: The swimming performance indicator was a 25-m sprin...

Constant global advancements and expanding evidence in the neuroscience of learning have provided compelling support for the inclusion of neuroscience as a crucial content priority in initial teacher education. Existing research confirms the efficacy of neurocognitive interventions for atypical and typical school-aged learners in a variety of key s...

IntroductionThis study examined the effects of an 8-week backward running (BR) vs. forward running (FR) training programmes on measures of physical fitness in young female handball players.Methods Twenty-nine players participated in this study. Participants were randomly assigned to a FR training group, BR training group, and a control group.Result...

Lower limbs muscle injuries (LLMI) are the most common sports-related injuries during practice and/or competition. The most affected muscle groups are the adductors, hamstrings, quadriceps, and calf muscles. These injuries generate a considerable competitive and economic burden, justifying a comprehensive investment in strategies focused on reducin...

Purpose To improve basketball players’ athletic performance, effective and optimal training programs are needed. The study aim was to compare the effects of 6 weeks of plyometric training (PT) to high-intensity interval training (HIIT) on youth female basketball player’s athletic performance. Methods The athletes were randomly divided into PT (n =...

INTRODUCTION: The cross-education (CE) has been shown to induce positive effects during unilateral limb immobilization, rehabilitation in musculoskeletal injuries, and for stroke patients that course with hemiplegia. The aim of this systematic review and meta-analysis was to determine the effect of contralateral resistance training (i.e., cross-edu...

INTRODUCTION: Resistance training (RT) promotes increases in muscle strength and mass, muscle power, functional capacity, and quality of life (1). However, only a few literature reviews have attempted to meta-analyze RT effects in patients with chronic obstructive pulmonary disease (COPD) (2). Thus, the aim of this systematic review and meta-analys...

Although measures of exercise performance and physical activity are known to be related to 6-minute walk test (6mWT), the role of the strength of each muscle group of the lower limb in the locomotor capacity during the development period is unknown. OBJECTIVE: To identify the role of the isometric strength of lower limb muscles and cardiovascular p...

This study aimed to compare the effects of horizontal (HJ) and vertical (VJ)-based plyometric jump training on male semi-professional soccer player's performance (e.g., change-of-direction speed [5-0-5 test]; 10-m, 20-m, and 30-m linear sprint speed). A parallel-study design was conducted. Participants were organized into HJ (n = 10) or VJ (n = 9)...

The aims of this study were to (i) estimate the intra- and inter-day reliability of mean concentric (CON) and eccentric (ECC) power at different inertial loads during a flywheel quarter-squat using a cluster set approach; and (ii) to determine the acute effect of internal and external attentional focus on mean power when performing the flywheel qua...

This study aimed to assess the validity, reliability, and sensitivity of mobile applications for assessing change-of-direction speed (CODS) performance. Thirty college athletes performed two Illinois CODS tests during one session. Assessments were carried out simultaneously using six devices (the CODTimer app, Seconds Count app, StopwatchCamera app...

This study aimed to systematically review and synthesize evidence (i.e., active [land-based training] and non-active controls [e.g., receiving usual care]) regarding the effects of water-based training on patients with non-specific chronic low-back pain (NSCLBP). Web of Science (WOS), PubMed (MEDLINE), EMBASE, EBSCO (SPORTDiscus; CINAHL), and PEDro...

Arterial stiffness (AS) describes the mechanical properties of the arterial wall and predicts cardiovascular health. AS is improved by aerobic exercise. However, the effects of resistance training (RT) on AS are less clear. Therefore, this meta-analysis aimed to assess the effects of RT on AS. A systematic search for randomized-controlled trials pu...

Padel is an intermittent racket sport played in pairs (2 vs. 2) on a small-sized grass court (20 x 10 m), involving high physical fitness demands for the players. Therefore, this study aims to compare the effect of two 8-week in-season training programs on the athletic performance of male padel players. Participants (age, 22.1±0.8; body height, 182...

This study compared the effects of a sand-based 6-week combined plyometric and sprint-training programme to regular preseason training, on the athletic performance and technical actions of beach handball (BH) players. Athletes were randomly assigned to control group (CG, n=12; BH training only) and experimental group (EG, n=12; plyometric + sprint...

Fascial restrictions that occur in response to myofascial trigger points (MTrP), exercise-induced muscle damage (EIMD) and delayed onset of muscle soreness (DOMS) cause soft tissue to lose extensibility which contributes to abnormal muscle mechanics, reduced muscle length and decrements in joint range of motion (ROM) and actively contributes to mus...

Objective: To evaluate the effects of exergames added to a conventional physical therapy (CPT) program on functional fitness (FF) and dynamometric muscle performance for the sit-to-stand (STS) maneuver in older adults and to compare their results concerning a CPT-only intervention. Materials and Methods: Fifty independent older adults were randomly...

The phase angle (PhA) of bioelectrical impedance determines primary factors such as age, body mass index and sex. The researchers’ interest in applying PhA to better understand the skeletal muscle property and ability has grown, but the results are still heterogeneous. This systematic review with a meta-analysis aimed to examine the existence of re...

Background: Altering moderator variables during a jump rope training (JRT) program can provide a novel training modification that can be used to modify the specific training outcomes. JRT is commonly implemented as a traditional game activity in many countries as an old culture of physical activity in school-age participants (SAP). However, strengt...

Background Engaging in physical activity increases energy expenditure, reducing total body fat. Time spent in sedentary behaviours is associated with overweight and obesity, and adequate sleep duration is associated with improved body composition. This systematic review aimed to analyse the relationship between compliance with the 24-h movement gui...

This study aimed to explore the acute effect of four velocity-based resistance training (VBT) protocols on 2000-meter rowing ergometer (RE2000) time-trial, as well as the behavior of the maximal neuromuscular capacities when RE2000 is performed alone or preceded by VBT protocols in the same session. Fifteen male competitive rowers (15-22 years) und...

This systematic review analyzed the effects of recreational soccer programs on physical fitness and health-related outcomes in youth populations. Studies were sought in the following databases: (i) PubMed, (ii) Scopus, (iii) SPORTDiscus, and (iv) Web of Science. The eligibility criteria included (1) population: youth (<18 years old) populations wit...

Abstract: The phase angle (PhA) of bioelectrical impedance is determined by primary factors such as age, body mass index and sex. The researchers’ interest in applying PhA to better understand the skeletal muscle property and ability has grown, but the results are still heterogeneous. This systematic review with a meta-analysis aimed to examine the...

Abstract: The phase angle (PhA) of bioelectrical impedance is determined by primary factors such as age, body mass index and sex. The researchers’ interest in applying PhA to better understand the skeletal muscle property and ability has grown, but the results are still heterogeneous. This systematic review with a meta-analysis aimed to examine the...

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 optimal intra-set rest in cluster sets (CLS) plyometric-jump training (PJT) to improve physical fitness remains unclear. Thus, this study compared the effects of PJT with traditional (TRS) vs. CLS structures using different intra-set rests on physical fitness components. Forty-seven recreationally active young men performed 3-5 sets of 10-12 re...

This study explored the effects of an 8-week repeated backward running training (RBRT) programme on measures of physical fitness in youth male soccer players. Youth male soccer players were randomly allocated into a RBRT group (n = 20; 13.95 ± 0.22 y) or a control group (CG; n = 16; 14.86 ± 0.29 y). The CG continued normal soccer training, while th...

BACKGROUND/AIM The 2014 World Cup at Brazil exposed players to high temperatures, drawing attention to the need to study and understand the effect that heat has on physical, physiological and anticipatory performance of players [1]. This systematic review examined the effect of ambient temperature on football players who followed an assessment of t...

Abstract Background Among youth, plyometric-jump training (PJT) may provide a safe, accessible, and time-efficient training method. Less is known on PJT effectiveness according to the maturity status. Objective This systematic review with meta-analysis set out to analyse the body of peer-reviewed articles assessing the effects of PJT on measures of...

The aim was to explore the effects of a 32-week resistance training (RT) intervention with elastic bands with or without microfiltered seawater (SW) supplementation on isokinetic strength, bone mineral density (BMD), body composition, and subjective quality of life in postmenopausal women. Ninety-three untrained women (age: 70.00±6.26 years; body m...

Background: Non-communicable diseases (NCD) are an important concern for public health be-cause of their high rates of morbidity and mortality. A prevalent lifestyle-linked NCD is type 2 diabetes mellitus (T2D). Recently, molecular biomarkers secreted by adipocytes, called adi-pokines, have been linked with T2D and muscle function disturbances. How...

[This corrects the article DOI: 10.3389/fphys.2023.1127669.].

Background: The reactive strength index (RSI) is meaningfully associated with independent markers of athletic (e.g., linear sprint speed) and neuromuscular performance (e.g., stretch-shortening-cycle [SSC]). Plyometric jump training (PJT) is particularly suitable to improve the RSI due to exercises performed in the SSC. However, no literature revie...

Aging is associated with muscle atrophy, and erosion and destruction of neuronal pathways in the spinal cord. The study aim was to assess the effect of swimming training (Sw) and L-Arginine loaded chitosan nanoparticles (LA-CNPs) on sensory and motor neuron population, autophagy marker LC3, total oxidant status / total antioxidant capacity, behavio...

Aim: This prospective cross-sectional intervention study aimed to compare the effect of different frequencies (equated for total repetitions) of plyometric-jump and linear-sprint training on U-18 (age, 17,0 ± 1,05) male futsal athlete’s physical fitness. Methods: Athletes (33) were randomly distributed into groups with one (1-TSW, n = 10), two (2-T...

This study explored the effects of an 8-week repeated backward running training (RBRT) programme on measures of physical fitness in youth male soccer players. Youth male soccer players were randomly allocated into a RBRT group (n=20; 13.95±0.22y) or a control group (CG; n=16; 14.86±0.29y). The CG continued normal soccer training, while the RBRT gro...

The aim of this review was to describe and summarize the scientific literature on programming parameters related to jump or plyometric training in male and female soccer players of different ages and fitness levels. A literature search was conducted in the electronic databases PubMed, Web of Science and Scopus using keywords related to the main top...

Among the people most affected by coronavirus disease 2019 (COVID-19) are those suffering from hypertension (HTN). However, pharmacological therapies for HTN are ineffective against COVID-19 progression and severity. It has been proposed that exercise training (EX) could be used as post-COVID treatment, which does not rule out the possible effects...

Aim: This prospective cross-sectional intervention study aimed to compare the effect of different frequencies (equated for total repetitions) of plyometric-jump and linear-sprint training on U-18 (age, 17,0 ± 1,05) male futsal athlete's physical fitness. Methods: Athletes (33) were randomly distributed into groups with one (1-TSW, n = 10), two (2-T...

Aim: The aims of this scoping review were (i) to characterize the main methodological approaches to assessing individualized running speed thresholds in team sports players; (ii) to assess the use of traditional arbitrary (absolute) thresholds compared to individualized running speed thresholds in team sports players; (iii) to provide an evidence g...

Introduction: The cardiorespiratory optimal point (COP) represents the lowest minute ventilation to oxygen consumption ratio (VE/VO2) and can be estimated during a CPET at submaximal intensity when an exercise test until volitional fatigue is not always advisable (i.e., a conflict zone where you cannot be confident of the security because near-comp...

This study aims to compare the effects of standard warm-up versus stretching-focused warm-up on the physical performance of male youth soccer players. Eighty-five male soccer players (age: 10.3±4.3 years; body mass index: 19.8±4.3 kg/m2) were assessed for countermovement jump height (CMJ, cm), 10 m, 20 m and 30 m running sprint speed (s) and ball k...

Background: lifestyle and cardiometabolic risk factors information is scarce regarding youth and adults of Latin-American ethnics. Objective: the primary aim was to describe the lifestyle and cardiometabolic risk factors for arterial hypertension (HTN) and diabetes in ethnic Latin-American groups (Mapuche and Aymara) and other non-ethnics > 15 y...

Abstract: We aimed to assess the athletic performance changes in combat sport athletes (CoSA) after plyometric-jump training (PJT) compared to control condition through a systematic review with meta-analysis. Following PRISMA guidelines, three electronic databases were searched for includable articles, according to a PICOS approach. Using a random-...

One of the most often-used task constraints in designing small-sided games (SSGs) is the manipulation of pitch size to promote increases or decreases in the relative area per player. Such adjustments cause changes in the acute responses during SSGs. This systematic review with meta-analysis aimed to compare the effects of smaller vs. larger pitch s...

Background: Hamstrings injuries are common in sports and the reinjury risk is high. Despite the extensive literature on hamstrings injuries, the effectiveness of the different conservative (i.e., non-surgical) interventions (i.e., modalities and doses) for the rehabilitation of athletes with acute hamstrings injuries is unclear. Objective: We aime...

Complex contrast training (CCT) is an exercise modality that utilizes both high-load resistance activity and low-load plyometric activity in a set-by-set fashion within a single exercise session. Such a combination of exercises targets multiple aspects of the force–velocity curve and may thus lead to improvement of various components of physical fi...

ABSTRACT: This systematic review aimed to (1) identify and summarize studies that have examined the effects of re-warm-up (RWU) protocols on the physical performance of soccer players (vertical height jump and sprinting time) and (2) establish a meta-comparison between performing a re-warm-up and not performing one regarding the outcomes of the afo...

Purpose: This randomised controlled trial examined the effect of an 8-week volume-equated programme of Nordic hamstring exercise (NHE) training, executed at frequencies of 1- or 2-days per week, on fitness (10 m and 40 m sprint, '505' change of direction [COD] and standing long jump [SLJ]) in male youth soccer players (mean age: 16.4 ± 0.81 years)...