The purpose of this study was to determine the mean propulsive velocity (MVP) at various percentages of one repetition maximum (1RM) in the full squat and chest press exercises. A total of 96 young women and 256 young men (recreational athletes) performed an incremental test (50–60–70–80% 1RM) comprising the bench press and full squat exercises in two different sessions. The individual load and velocity ratios were established through the MPV. Data were analyzed using SPSS software version 25.0, with the significance level set at 5%. The following findings were revealed: highly linear load-velocity relationships in the group of women (r = 0.806 in the squat, and r = 0.872 in the bench press) and in the group of men (r = 0.832 and r = 0.880, respectively); significant differences (p < 0.001) in the MPV at 50–70–80% 1RM between the bench press and the full squat in men and at 70–80% 1RM in women; and a high variability in the MPV (11.49% to 22.63) in the bench press and full squat (11.58% to 25.15%) was observed in women and men (11.31% to 21.06%, and 9.26% to 24.2%) at the different percentages of 1RM evaluated. These results suggest that the load-velocity ratio in non-strength-trained subjects should be determined individually to more precisely establish the relative load to be used in a full squat and bench press training program.

The purpose of this study was to examine the type of relationship between measures of maximal force (dynamic and isometric), maximal power, and mean propulsive velocity. In total, 355 recreational athletes, 96 women (age 20.5 ± 2.5 years; height 158.2 ± 17.3 cm; weight 61.8 ± 48.4 kg) and 259 men (age 21.0 ± 2.6 years; height 170.5 ± 12.6 cm; weight 65.9 ± 9.2 kg) were evaluated in three sessions separated by 72 h each in isometric midthigh pull exercise (ISOS) (kg), bench press maximum strength (1RM MSBP) (kg), jump height (CMJ) (m), and maximum pedaling power (WT) the maximum squat strength (1RM MSS) (kg), the mean propulsive velocity in the bench press (MPVBP) (m·s⁻¹), and the peak power (PPBP) (w), mean propulsive squat velocity (MPVS) (m·s⁻¹), peak power (PP) (w), maximum handgrip force (ISOHG) (kg), and 30 m movement speed (V30) (s). Significant correlations (p ≤ 0.01) were identified between 95% of the various manifestations of force, and only 5% presented a significance of p ≤ 0.05; however, when the magnitude of these correlations is observed, there is great heterogeneity. In this sense, the dynamic strength tests present the best correlations with the other strength and power tests used in the present study, followed by PPBP and PP. The results of this study complement what is reported in the literature regarding the correlation between different types of force manifestations being heterogeneous and contradictory.

Background: Several studies have investigated the importance of physical exercise (PE) in overweight and obese populations; however, to date, no bibliometric study has analyzed research trends in high-intensity interval training (HIIT) in overweight and obese populations across the entire life course. Objective: To analyze the scientific output of HIIT trends in overweight and obese populations. Method: Theoretical study using bibliometrics as a research technique. A total of 282 studies were identified in the Web of Science and PubMed databases for analysis with VOSViewer software 1.6.20. The equation used was (“High-intensity interval training” OR HIIT) AND (overweight OR obesity OR “risk factors” OR “obesity risk”). Results: The year 2022 was the most productive year (n = 46). Most of the documents are research articles (81%), followed by review articles (15%). Most studies do not specify the characteristics of the sample, only mentioning the application of a HIIT program in overweight or obese individuals in (65.6%) of the total articles found. There is low scientific output in research focused on women (23.4%). The most frequently occurring words were “exercise” (n = 145), “obesity” (n = 131), “high-intensity interval training” (n = 81), “overweight” (n = 78), “physical activity” (n = 73), “body composition” (n = 46), “weight loss” (n = 45), “health” (n = 42), and “cardiorespiratory fitness” (n = 40). Conclusions: Scientific research has advanced the understanding of the impact of HIIT in relation to excess weight, with total fat reduction being one of the most frequently reported variables and no differences observed between sexes. HIIT has shown benefits in populations with overweight and obesity when compared with low-intensity training programs.

Introduction: Soccer is the sport with the highest risk of muscle injury for players. Eccentric exercise is fundamental for reducing injury rates and isoinertial technology devices cause an increase in eccentric demands after a concentric contraction.Objective: To identify the use of isoinertial technology in the fields of physical activity and sports for rehabilitation and prevention of muscle injuries reported in scientific literature.Materials and methods: A search of scientific papers in PubMed, Google Scholar, EMBASE and Science Direct data base was performed by using the following MeSH medical terms and search equations: [isoinertial AND technology AND flywheels] and [free weight AND sport AND humans AND soccer].Results: 23 references, classified into three approaches, were selected: isoinertial technology for rehabilitation, fitness and injury prevention. The use of this technology is fundamental due to the increase of the eccentric demand in muscle groups.Conclusions: Isoinertial technology is a useful tool for treating and preventing injuries, as well as for the development of physical qualities. However, it is necessary to work on protocols that allow unifying its usage parameters so that it can be included in prevention programs.

Background/Objectives: Heart rate variability (HRV) is a reliable, non-invasive marker of autonomic nervous system function and is often impaired in individuals with metabolic syndrome (MetS). Physical exercise has emerged as an effective strategy to improve autonomic modulation; however, the comparative effects of different training modalities on HRV in individuals with MetS remain unclear. This systematic review and meta-analysis aimed to evaluate the impact of various exercise interventions on HRV and to identify which training types yield the most significant improvements. Methods: A systematic search was conducted in PubMed and Scopus up to April 2025. Eligible studies (n = 16) included adults with obesity and MetS (n = 752) who underwent structured exercise interventions with HRV assessments pre- and post-intervention. Standardized mean differences were calculated using random effects models. Subgroup analyses were performed based on training modality (endurance training [ET], resistance training [RT], high-intensity interval training [HIIT], and concurrent training [CT]). Results: Sixteen studies of moderate to high quality were included, with eleven studies eligible for meta-analysis. ET and HIIT significantly improved time-domain indices (Root mean square of differences of successive R-R intervals —rMSSD—, Standard deviation of the R-R interval series —SDNN—) and frequency-domain parameters (high-frequency —HF—), suggesting enhanced parasympathetic activity. RT showed inconsistent effects, while CT improved long-term HF and total power (TP). Non-linear indices were the least reported due to insufficient data. Conclusions: Physical exercise—particularly ET and HIIT—appears to enhance cardiac autonomic modulation in individuals with obesity and MetS. These findings support incorporating targeted training strategies into clinical practice to optimize cardiovascular health in these populations.

Introducción: En salvamento acuático las condiciones físicas son poco evaluadas, a pesar de que existe literatura científica que hace referencia a dicha temática, esta se encuentra en su mayoría en salvavidas de playa siendo muy limitada la información referente al personal de salvamento en aguas confinadas. Objetivos: Determinar las capacidades físicas en personal de salvamento acuático. Metodología: 17 salvavidas pertenecientes a las empresas Fundación: Deporteo y Campus Activo, se aplicó una batería de evaluación conformada por once Test físicos para medir la condición física. La información se sistematizó en una base de datos en Excel, y se trataron los datos estadísticamente en el Software Rstudio. Resultados: Se realizó una correlación de datos cuantitativos para determinar las capacidades físicas en personal de salvamento acuático, se encontró que 53% obtuvo un resultado regular en Fuerza de Miembros Superiores, el 71% obtuvo un resultado malo para fuerza de la zona Abdominal y para Resistencia un 47% un resultado regular. Conclusiones: Existe un déficit en el desarrollo de capacidades físicas, capacidades fundamentales para la técnica del salvamento, además de ser, un factor de riesgo intrínseco modificable para la presencia de lesiones. Al ser limitados los registros es importante seguir realizando estudios de este tipo.