Rodrigo Ramirez-Campillo1,2, Daniel Castillo3, Javier Raya-González3, Jason Moran4, Eduardo Sáez de Villarreal5, Rhodri S Lloyd6,7,8. 1. Human Performance Laboratory, Quality of Life and Wellness Research Group, Department of Physical Activity Sciences, Universidad de Los Lagos, Osorno, Chile. r.ramirez@ulagos.cl. 2. Centro de Investigación en Fisiología del Ejercicio, Facultad de Ciencias, Universidad Mayor, Santiago, Chile. r.ramirez@ulagos.cl. 3. Faculty of Health Sciences, Universidad Isabel I, Burgos, Spain. 4. School of Sport, Rehabilitation and Exercise Sciences, University of Essex, Colchester, UK. 5. Universidad Pablo de Olavide, Physical Performance and Sports Research Center, Seville, Spain. 6. Youth Physical Development Centre, Cardiff School of Sport and Health Sciences, Cardiff Metropolitan University, Cardiff, UK. 7. Sport Performance Research Institute, New Zealand (SPRINZ), AUT University, Auckland, New Zealand. 8. Centre for Sport Science and Human Performance, Waikato Institute of Technology, Hamilton, New Zealand.
Abstract
BACKGROUND: Even from a young age, modern soccer requires high levels of physical fitness development, particularly jumping and sprinting. Plyometric jump training (PJT), combined with young athletes' regular soccer sessions, has the potential to improve jumping and sprinting. However, studies exploring the effects of PJT are generally limited by small sample sizes. This problem of underpowered studies may, thus, be resolved by pooling study results in a meta-analysis. OBJECTIVE: The objective of this systematic review with meta-analysis (SRMA) was to assess the effects of plyometric jump training (PJT) on jumping and sprinting among young male soccer players. METHODS: The SRMA included peer-reviewed articles that incorporated PJT in healthy players (i.e., < 23 years of age), a control group, and a measure of jumping or sprinting. Means and standard deviations of outcomes were converted to Hedges' g effect sizes (ES), using the inverse variance random-effects model. Moderator analyses were conducted for PJT duration, frequency, total number of sessions, participants' chronological age, and FIFA age categories (i.e., U-17 vs. U-20 vs. U-23). A multivariate random-effects meta-regression was also conducted. RESULTS: Thirty-three studies were included, comprising 1499 participants. PJT improved vertical jump tests (ES = 0.60-0.98; all p < 0.01) and linear sprint performance (ES = 0.60-0.98; p < 0.03). Interventions of > 7 weeks and > 14 PJT sessions induced greater effects compared to PJT with ≤ 7 weeks and ≤ 14 total sessions on 10-m sprint performance (between group p = 0.038). CONCLUSION: PJT is effective in improving jumping and sprinting performance among young male soccer players. Greater 10-m linear sprinting improvements were noted after interventions > 7-week duration and > 14 sessions, suggesting a greater return from exposure to longer PJT interventions, partially in support for the adoption of a long-term approach to athletic development in young athletes. However, with reference to the findings of the meta-regression, and those from the remaining subgroup and single factors analysis, a robust confirmation regarding the moderator role of participant's age or PJT configuration effects on young soccer player's fitness qualities needed.
BACKGROUND: Even from a young age, modern soccer requires high levels of physical fitness development, particularly jumping and sprinting. Plyometric jump training (PJT), combined with young athletes' regular soccer sessions, has the potential to improve jumping and sprinting. However, studies exploring the effects of PJT are generally limited by small sample sizes. This problem of underpowered studies may, thus, be resolved by pooling study results in a meta-analysis. OBJECTIVE: The objective of this systematic review with meta-analysis (SRMA) was to assess the effects of plyometric jump training (PJT) on jumping and sprinting among young male soccer players. METHODS: The SRMA included peer-reviewed articles that incorporated PJT in healthy players (i.e., < 23 years of age), a control group, and a measure of jumping or sprinting. Means and standard deviations of outcomes were converted to Hedges' g effect sizes (ES), using the inverse variance random-effects model. Moderator analyses were conducted for PJT duration, frequency, total number of sessions, participants' chronological age, and FIFA age categories (i.e., U-17 vs. U-20 vs. U-23). A multivariate random-effects meta-regression was also conducted. RESULTS: Thirty-three studies were included, comprising 1499 participants. PJT improved vertical jump tests (ES = 0.60-0.98; all p < 0.01) and linear sprint performance (ES = 0.60-0.98; p < 0.03). Interventions of > 7 weeks and > 14 PJT sessions induced greater effects compared to PJT with ≤ 7 weeks and ≤ 14 total sessions on 10-m sprint performance (between group p = 0.038). CONCLUSION: PJT is effective in improving jumping and sprinting performance among young male soccer players. Greater 10-m linear sprinting improvements were noted after interventions > 7-week duration and > 14 sessions, suggesting a greater return from exposure to longer PJT interventions, partially in support for the adoption of a long-term approach to athletic development in young athletes. However, with reference to the findings of the meta-regression, and those from the remaining subgroup and single factors analysis, a robust confirmation regarding the moderator role of participant's age or PJT configuration effects on young soccer player's fitness qualities needed.
Authors: Naomi Datson; Andrew Hulton; Helena Andersson; Tracy Lewis; Matthew Weston; Barry Drust; Warren Gregson Journal: Sports Med Date: 2014-09 Impact factor: 11.136
Authors: Mario Sánchez; Javier Sanchez-Sanchez; Fabio Y Nakamura; Filipe M Clemente; Blanca Romero-Moraleda; Rodrigo Ramirez-Campillo Journal: Int J Environ Res Public Health Date: 2020-11-30 Impact factor: 3.390
Authors: Ghaith Aloui; Souhail Hermassi; Thomas Bartels; Lawrence D Hayes; El Ghali Bouhafs; Mohamed Souhaiel Chelly; René Schwesig Journal: Front Physiol Date: 2022-02-18 Impact factor: 4.566
Authors: Rodrigo Ramirez-Campillo; Alejandro Perez-Castilla; Rohit K Thapa; José Afonso; Filipe Manuel Clemente; Juan C Colado; Eduardo Saéz de Villarreal; Helmi Chaabene Journal: Sports Med Open Date: 2022-08-29