Browsing by Subject "Jump"

Now showing 1 - 3 of 3
  • Thumbnail Image
    Publication
    Open Access
    Comparison between the trajectory and movement velocity of shoulders vs. hip during vertical jumps
    (2017-09-21) Jiménez Ruiz, Abel; Actividad Física y Deporte
    The vertical velocity at takeoff has been extensively used for estimating the height achieved during vertical jumps. Although this criterion has been applied when exercising on a force or a contact platform, recent works have calculated the height of the jump by measuring the displacement using a velocity transducer attached to the bar positioned at the shoulders' level
  • Thumbnail Image
    Publication
    Open Access
    Effects of velocity loss threshold during resistance training on strength and athletic adaptations: a systematic review with meta-analysis
    (MDPI, 2022-04-27) Hernández Belmonte, Alejandro; García Pallarés, Jesús; Actividad Física y Deporte
    This study aimed to systematically review the effects of the different velocity loss (VL) thresholds during resistance training (RT) on strength and athletic adaptations. The VL was analyzed as both a categorical and continuous variable. For the categorical analysis, individual VL thresholds were divided into Low-ModVL (≤ 25% VL) or Mod-HighVL (> 25% VL). The efficacy of these VL thresholds was examined using between-group (Low-ModVL vs. Mod-HighVL) and within-group (pre–post effects in each group) analyses. For the continuous analysis, the relationship (R2) between each individual VL threshold and its respective effect size (ES) in each outcome was examined. Ten studies (308 resistance-trained young men) were finally included. The Low-ModVL group trained using a significantly (p ≤ 0.001) lower VL (16.1 ± 6.2 vs. 39.8 ± 9.0%) and volume (212.0 ± 102.3 vs. 384.0 ± 95.0 repetitions) compared with Mod-HighVL. Between-group analyses yielded higher efficacy of Low-ModVL over Mod-HighVL to increase performance against low (ES = 0.31, p = 0.01) and moderate/high loads (ES = 0.21, p = 0.07). Within-group analyses revealed superior effects after training using Low-ModVL thresholds in all strength (Low-ModVL, ES = 0.79–2.39 vs. Mod-HighVL, ES = 0.59–1.91) and athletic (Low-ModVL, ES = 0.35–0.59 vs. Mod-HighVL, ES = 0.05–0.36) parameters. Relationship analyses showed that the adaptations produced decreased as the VL threshold increased, especially for the low loads (R2 = 0.73, p = 0.01), local endurance (R2 = 0.93, p = 0.04), and sprint ability (R2 = 0.61, p = 0.06). These findings prove that low–moderate levels of intra-set fatigue (≤25% VL) are more effective and efficient stimuli than moderate–high levels (> 25% VL) to promote strength and athletic adaptations.
  • Thumbnail Image
    Publication
    Open Access
    The acute effects of various dynamic stretching exercises on jump performance and range of motion
    (Universidad de Murcia. Servicio de Publicaciones, 2025) Savaşan, Mustafa; Pınar, Yeliz; Pınar, Salih; Sin departamento asociado
    This study aimed to investigate the acute effects of different dynamic stretching (DS) protocols on vertical jump performance and range of motion (ROM). Thirty healthy male participants, with an average age of 23.48 years, body weight of 76.90 kg, and height of 181.87 cm, who had engaged in recreational exercise for at least two years, participated voluntarily. A "cross-controlled randomized" experimental design was utilized to assess four distinct DS protocols: a-DS at 100 bpm for 30", b-DS at 100 bpm for 75" s, c-DS at 150 bpm for 30", and d-DS at 150 bpm for 75". Acute ROM was measured using the Passive Straight Leg Raise Test (PSLR), while jump performance was assessed via countermovement jump (CMJ). Data were analyzed using repeated measures ANOVA and paired samples T-tests with significance set at p<.05. All four DS techniques significantly increased angles measured by PSLR following application (p <.05). CMJ values also showed significant improvements in both groups subjected to the shorter protocols lasting 30"at either tempo (p <.05). Consideration should be given to application duration and tempo when planning DS exercises, as structured warm-up routines can enhance flexibility and optimize athletic performance.