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Abstract
The purpose of this study was to use an inertial measurement unit (IMU) to analyze variations in the jump outcomes concerning weekly training days, and the dependencies between the number of jumps per minute and the jump height. An experimental research design was adopted across three weeks of the final play-off of a volleyball championship. Through an IMU, the external load of seven male elite volleyball athletes of a top rating team from Portuguese 1st Division (age: 30.5 ± 3.5 years; height: 200.2 ± 6.3 cm; body mass: 93.0 ± 8.1 kg; BMI: 23.1 ± 2.3 kg/m2) was monitored. Repeated measures ANOVA was executed to compare the outcomes between training days. It was observed a similar density of jumps during the week. However, when comparing MD-1 to MD-2, a more significant average number of jumps per minute was observed in MD-1 (1.3 ± 0.2 vs. 1.0 ± 0.2). Additionally, a positive, large and significant correlation was registered between the number of jumps and the height of the jump. Those results highlight the benefits of the specific training, leading to greater stimulation and improvement, in a game-like context, of the stretching-shortening cycle, observed in every jump action in volleyball.
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1 Rua Escola Industrial e Comercial de Nun’Álvares, Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Viana do Castelo, Portugal (GRID:grid.27883.36) (ISNI:0000 0000 8824 6371); Innovation and Technology (SPRINT), Research Center in Sports Performance, Recreation, Melgaço, Portugal (GRID:grid.27883.36)
2 Rua Escola Industrial e Comercial de Nun’Álvares, Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Viana do Castelo, Portugal (GRID:grid.27883.36) (ISNI:0000 0000 8824 6371); Innovation and Technology (SPRINT), Research Center in Sports Performance, Recreation, Melgaço, Portugal (GRID:grid.27883.36); The Research Centre in Sports Sciences, Health Sciences and Human Development (CIDESD), Vila Real, Portugal (GRID:grid.513237.1)
3 Rua Escola Industrial e Comercial de Nun’Álvares, Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Viana do Castelo, Portugal (GRID:grid.27883.36) (ISNI:0000 0000 8824 6371); Innovation and Technology (SPRINT), Research Center in Sports Performance, Recreation, Melgaço, Portugal (GRID:grid.27883.36); Higher Institute of Educational Sciences of the Douro, Department of Sports, Penafiel, Portugal (GRID:grid.27883.36)
4 Universidade Federal de Mato Grosso, Faculdade de Educação Física, Cuiabá, Brazil (GRID:grid.411206.0) (ISNI:0000 0001 2322 4953)
5 Universidade Lusófona, CIDEFES, Centro de Investigação em Desporto, Educação Física e Exercício e Saúde, Lisboa, Portugal (GRID:grid.164242.7) (ISNI:0000 0000 8484 6281); Sporting Clube de Portugal, COD, Center of Sports Optimization, Lisboa, Portugal (GRID:grid.164242.7)
6 Rua Escola Industrial e Comercial de Nun’Álvares, Escola Superior Desporto e Lazer, Instituto Politécnico de Viana do Castelo, Viana do Castelo, Portugal (GRID:grid.27883.36) (ISNI:0000 0000 8824 6371); Instituto de Telecomunicações, Delegação da Covilhã, Lisboa, Portugal (GRID:grid.421174.5) (ISNI:0000 0004 0393 4941)
7 University of Mohaghegh Ardabili, Department of Exercise Physiology, Faculty of Educational Sciences and Psychology, Ardabil, Iran (GRID:grid.413026.2) (ISNI:0000 0004 1762 5445); University of Extremadura, Faculty of Sport Sciences, Cáceres, Spain (GRID:grid.8393.1) (ISNI:0000000119412521)