Vertical jump fatigue does not affect intersegmental coordination and segmental contribution

Abstract

The aim of this study was to describe the intersegmental coordination and segmental contribution during intermittent vertical jumps performed until fatigue. Seven male visited the laboratory on two occasions: 1) the maximum vertical jump height was determined followed by vertical jumps habituation; 2) participants performed intermittent countermovement jumps until fatigue. Kinematic and kinetic variables were recorded. The overall reduction in vertical jump height was 5,5%, while the movement duration increased 10% during the test. The thigh segment angle at movement reversal significantly increased as the exercise progressed. Non-significant effect of fatigue on movement synergy was found for the intersegmental coordination pattern. More than 90% of the intersegmental coordination was explained by one coordination pattern. Thigh rotation contributed the most to the intersegmental coordination pattern, with the trunk second and the shank the least. Therefore, one intersegmental coordination pattern is followed throughout the vertical jumps until fatigue and thigh rotation contributes the most to jump height.

Muscular fatigue in response to different modalities of CrossFit sessions

“…To quantifying muscular fatigue through mechanical variables, some studies have focused on total jump duration [ 25 , 26 ]. These investigations distinguish two jump stages: a negative movement phase (corresponding to ECC) and a positive movement phase (corresponding to CON).…”

“…These investigations distinguish two jump stages: a negative movement phase (corresponding to ECC) and a positive movement phase (corresponding to CON). The start of ECC has been linked to the time point at which bodyweight falls by 2% [ 25 ] or 5% [ 26 ]. This stage finishes when angular displacement of the knee peaks [ 26 ] or when the net velocity of the center of mass is zero [ 25 ].…”

“…These variables were selected because a loss of jump height and force in a CMJ test during an exercise session has been used to indicate neuromuscular fatigue [ 14 ]. Other variables that have been used to assess jump ability and neuromuscular fatigue are total jump duration, and the duration of the eccentric and concentric phases [ 25 , 26 ]. In our study, these durations were determined by measuring vertical reaction forces during the jump (range 0–10 kN; sampling frequency 0.5 kHz).…”

Specific warm-up exercise is the best for vertical countermovement jump in young volleyball players

“…Vertical countermovement jumps (VCMJs) are considered essential to success in volleyball, as they are used in both defensive (blocking) and offensive (attacking, passing, and serving) motions 1,2 VCMJs are performed frequently by volleyball players during training and competitions, and several studies have focused on how athletes can enable themselves to jump most effectively 3,4 Volleyball players must jump frequently in matches, making good jumping technique crucial. An analysis of two matches showed that the average player executed about 45 jumps and subsequent landings, and that the players' overall performance depended heavily on these actions 5 .…”

Controle de carga de treinamento: uma abordagem biomecânica

“…Estatisticamente, o investigador ou profissional tem uma probabilidade muito mais elevada (~10:1) de encontrar o valor "real" quando o valor médio é usado em comparação ao maior valor (HARVILL, 1991;PEREIRA et al, 2014). Encontrar o valor verdadeiro é essencial quando se monitora a "real" mudança de desempenho de um atleta (ATKINSON & NEVILL, 1998;HOPKINS, 2000;WEIR, 2005 , 2012).…”