Oscar Andrades-Ramírez

Prof. Oscar Andrades-Ramírez

University of the Americas
orcid

Research Focus & Metrics

Academic Career Length

5Years (2022-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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Felipe Montalva-ValenzuelaFelipe Montalva-Valenzuela
Felipe Montalva-Valenzuela
OAOscar Andrades-Ramírez
Oscar Andrades-Ramírez
Antonio Castillo ParedesAntonio Castillo Paredes
Antonio Castillo Paredes
Attention deficit hyperactivity disorder (ADHD) is a neurodevelopmental disorder that negatively affects the inattention, disorganization, and/or hyperactivity–impulsivity in children and adolescents who suffer from it, included cases being reported that continue into adulthood. This disorder impairs social, academic, emotional, psychological, and health system functioning due to its high cost of treatment. The present systematic review aims to analyze the effects of physical activity, exercise, and sports on the executive function in children and adolescents diagnosed with ADHD through the scientific literature. The results show that the practice of physical activity, exercise, or sport produces improvements in executive function in children and adolescents diagnosed with ADHD, mainly through aerobic exercise. A 20 min session of physical activity, sport, or exercise leads to improvements in executive functions in children and adolescents with ADHD. It can be concluded that the practice of physical activity, exercise, and sport generate improvements on executive functions in children and adolescents with ADHD, mainly through aerobic exercise.

14 December 2024 in Life
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LRLuis Sebastián Romero
Luis Sebastián Romero
DUDavid Ulloa-Díaz
David Ulloa-Díaz
Sergio Luis ArayaSergio Luis Araya
Sergio Luis Araya
FGFrancisco Guede-Rojas
Francisco Guede-Rojas
OAOscar Andrades-Ramírez
Oscar Andrades-Ramírez
DMDario Martinez-Garcia
Dario Martinez-Garcia
Objective: This systematic review and meta-analysis aimed to (I) evaluate the evidence on the effects of high-intensity interval training (HIIT) on systolic blood pressure (SBP) and diastolic blood pressure (DBP) in hypertensive patients; (II) determine whether HIIT impacts SBP and DBP differently; and (III) assess the clinical relevance of these effects. Methods: A comprehensive search was conducted across multiple electronic databases, resulting in the inclusion of seven randomized clinical trials in the meta-analysis. The outcomes were analyzed using random-effects models to compute mean differences (MD) and standardized mean differences (SMD) for SBP and DBP. Results: A small reduction in SBP was observed with HIIT interventions (MD −3.00; 95% CI −4.61 to −1.39; p < 0.0001; SMD −0.28; 95% CI −0.42 to −0.13; p = 0.0003). However, no statistically significant reductions were detected for DBP (MD −0.70; 95% CI −1.80 to 0.39; p = 0.21; SMD −0.07; 95% CI −0.22 to 0.08; p = 0.35). Despite demonstrating statistical significance for SBP, the effects did not reach clinical relevance. Conclusions: HIIT interventions yield small reductions in SBP, with minimal impact on DBP. These findings suggest limited clinical relevance in the management of hypertension. Further randomized controlled trials are necessary to standardize HIIT protocols, with specific emphasis on intensity control and manipulation, to better understand their potential role in hypertensive populations.

26 June 2024 in Sports
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OAOscar Andrades-Ramírez
Oscar Andrades-Ramírez
DUDavid Ulloa-Díaz
David Ulloa-Díaz
BABrayan Alfaro
Brayan Alfaro
PAPatricio Arroyo
Patricio Arroyo
Antonio Castillo ParedesAntonio Castillo Paredes
Antonio Castillo Paredes
Luis Javier Chirosa RíosLuis Javier Chirosa Ríos
Luis Javier Chirosa Ríos
The purpose of the study was to analyze the test–retest reliability of an isometric and isometric/vibratory muscular strength protocol in the bilateral seated bench press (BSBP), bilateral seated rowing (BSR), unilateral seated right knee extension (USKER), and left knee extension (USKEL) tests controlled using functional electromechanical dynamometry (FEMD) in healthy young adults. A repeated measures design was used to determine the reliability of a muscular strength protocol in isometric and isometric vibration modes with FEMD. No significant differences were found in test–retest analysis (p > 0.05; ES < 0.20); and high reliability (CV = 4.65–5.02%; ICC = 0.99–0.98) was found for BSBP measures, and acceptable reliability (CV = 3.71–9.61%; ICC = 0.98–0.95) was found for BSR, USKER, and USKEL. Furthermore, the coefficients between the two measures were strong (r = 0.963–0.839) and highly significant (p = 0.001) for maximal strength in the isometric and maximal isometric/vibratory assessment of muscle strength in all muscle strength tests. This study demonstrates that isometric and maximal isometric/vibratory strength in the BSBP, BSR, USKER, and USKEL tests can be measured with high reliability and reproducibility using the FEMD.

1 July 2025 in Discover Social Science and Health
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Felipe Montalva-ValenzuelaFelipe Montalva-Valenzuela
Felipe Montalva-Valenzuela
OAOscar Andrades-Ramírez
Oscar Andrades-Ramírez
GFGerson Luis de Moraes Ferrari
Gerson Luis de Moraes Ferrari
José Carmelo AdsuarJosé Carmelo Adsuar
José Carmelo Adsuar
JGJosé Irineu Gorla
José Irineu Gorla
Antonio Castillo ParedesAntonio Castillo Paredes
Antonio Castillo Paredes
The objective of this systematic review (PROSPERO: CRD42024503648) is to analyze and describe the effects of physical activity, exercise and sport interventions on fitness in children and adolescents with DS, to promote the improvement of physical fitness or in body composition. Following the PRISMA guidelines, a search strategy was carried out in four databases (Pubmed, WoS, Scopus and SciELO). Inclusion criteria: studies that used exercise, physical activity or sports as an intervention, which sought to improve physical fitness in children or adolescents with DS. PEDro scale and RoB-2 were used to evaluate the quality of the articles. Of the total number of participants, there were 342 participants in the experimental group and 279 in the control group. To synthesize the information from the studies, it was ordered based on authors and year of publication; country; study design; population; age of participants; intervention; instruments for data collection; results.16 investigations met the selection criteria. 8 studies mention an improvement in muscle fitness, 3 on cardiorespiratory fitness, 2 on body composition, 5 on balance, one on agility and one on functional capacity. The limitations of the study include the heterogeneity of the interventions, which makes their comparison and recommendation difficult, and the small number of articles of high methodological quality according to the scales used. It is concluded that physical activity, exercise or sports interventions with a duration of 30 min to 75 min with a frequency of two or three times a week, for a period of 6 weeks up to 36 weeks and even for at least 5 consecutive days, produce improvements in the components of fitness in children and adolescents with Down syndrome. Therefore, it is a viable strategy to seek improvements in the physical condition of children and adolescents with Down syndrome, which could lead to a general improvement in the life of this population. This review received no external funding.

26 May 2025 in Applied Sciences
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CCClaudio Carvajal-Parodi
Claudio Carvajal-Parodi
GAGonzalo Arias-Alvarez
Gonzalo Arias-Alvarez
DUDavid Ulloa-Díaz
David Ulloa-Díaz
LRLuis Sebastián Romero
Luis Sebastián Romero
OAOscar Andrades-Ramírez
Oscar Andrades-Ramírez
Jesús Ponce GonzálezJesús Ponce González
Jesús Ponce González
Fibromyalgia (FM) is characterized by persistent widespread pain that severely impacts quality of life. Immersive virtual reality-based exercise (iVRE) is emerging as a therapeutic modality for chronic pain management. However, research on iVRE in FM patients has primarily focused on perceived pain intensity (PI), with limited exploration of underlying analgesic mechanisms. This study aims to explore the effects of iVRE on PI, considering risk of poor outcomes (RPO) stratification, and on mechanical pain sensitivity (MPS) in FM. A single-arm, uncontrolled, pre-post-test exploratory study was conducted in subjects with FM. The intervention included 2 weekly 15-min iVRE sessions for 6 weeks. PI (numeric rating scale [NRS]) and MPS (pressure pain thresholds [PPTs] at the upper trapezius, lumbar spine, and knee) were assessed at baseline, after the first session (to assess exercise-induced hypoalgesia), and postintervention. RPO was assessed using the Keele STarT MSK Tool. Eleven participants completed the study. No adverse effects were reported. Clinically important reductions were observed in PI (mean difference [MD]: −2.36, 95% CI: [−4.15, −0.58], d = 0.89; p < 0.05) with this effect being associated with baseline RPO. No observable changes were found in PPTs (all 95% CIs included 0, p > 0.05). In this sample, iVRE appears to reduce PI but not PPTs, suggesting the persistence of MPS and limitations in activating endogenous pain inhibitory mechanisms. Further randomized controlled trials with larger samples are needed to corroborate these results.

29 August 2024
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LRLuis Sebastián Romero
Luis Sebastián Romero
DMDario Martinez-Garcia
Dario Martinez-Garcia
FGFrancisco Guede-Rojas
Francisco Guede-Rojas
OAOscar Andrades-Ramírez
Oscar Andrades-Ramírez
GBGustavo Alejandro Muñoz Bustos
Gustavo Alejandro Muñoz Bustos
DUDavid Ulloa-Díaz
David Ulloa-Díaz
INPLASY202480131 Effects of manipulation and intensity control of high-intensity interval training on blood pressure in persons with arterial hypertension: A Systematic Review and Meta-Analysis of …