Magnitude and reliability of mechanical outputs obtained during loaded squat jumps performed from different knee angles
Нема приказа
Аутори
Janićijević, DanicaKnežević, Olivera
Mirkov, Dragan M.
Perez-Castilla, Alejandro
Petrović, Miloš R.
Garcia-Ramos, Amador
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
This study aimed to explore the effect of the knee angle and loading condition on the magnitude and reliability of squat jump (SJ) performance variables. Thirteen male sport sciences students performed in a random order 4 SJ types (knee angle of 80o [SJ80], 90o [SJ90], 100o [SJ100], and self-preferred [SJ(pref)]) against 3 external loads. The push-off distance (HpO), jump height (Hmax), maximum force (Fmax) and maximum power (Pmax) were obtained from force platform recordings. The HpO during the SJ(pref) (43.4 +/- 6.4 cm) was always between SJ90 (44.3 +/- 4.8 cm) and SJ100 (40.5 +/- 4.2 cm). The magnitudes of Hmax, Fmax and Pmax were comparable or higher during the SJ(pref). The increase of the knee angle was associated with larger values of Fmax and Pmax, but no significant differences were observed for Hmax. An acceptable reliability was observed for HpO (coefficient of variation [CV] lt = 5.09% and intraclass correlation coefficient [ICC] gt = 0.78), Hmax (CV lt = 6.06% and ICC gt... = 0.84), Fmax (CV lt = 3.25% and ICC gt = 0.96) and Pmax (CV lt = 2.93% and ICC gt = 0.96). Reliability did not systematically differ between the 4 SJ types. In conclusion, the higher magnitudes and comparable reliability of the performance variables obtained during the SJ(pref) support its use for testing lower-body ballistic performance against different loads.
Кључне речи:
Ballistic performance / push-off distance / jump height / maximum force / maximum powerИзвор:
Sports Biomechanics, 2019Издавач:
- Routledge Journals, Taylor & Francis Ltd, Abingdon
Финансирање / пројекти:
- University of Granada under a post-doctoral grant (perfeccionamiento de doctores)
- FPU15/03649
- Мишићни и неурални фактори хумане локомоције и њихове адаптивне промене (RS-175037)
- Неинвазивна модулација кортикалне ексцитабилности и пластицитета - Развој метода неинвазивне неуромодулације централног нервног система у испитивања физиолошких механизама, дијагностици и терапији (RS-175012)
DOI: 10.1080/14763141.2019.1618390
ISSN: 1476-3141
PubMed: 31232220
WoS: 000472834000001
Scopus: 2-s2.0-85068038091
Институција/група
Institut za medicinska istraživanjaTY - JOUR AU - Janićijević, Danica AU - Knežević, Olivera AU - Mirkov, Dragan M. AU - Perez-Castilla, Alejandro AU - Petrović, Miloš R. AU - Garcia-Ramos, Amador PY - 2019 UR - http://rimi.imi.bg.ac.rs/handle/123456789/10 AB - This study aimed to explore the effect of the knee angle and loading condition on the magnitude and reliability of squat jump (SJ) performance variables. Thirteen male sport sciences students performed in a random order 4 SJ types (knee angle of 80o [SJ80], 90o [SJ90], 100o [SJ100], and self-preferred [SJ(pref)]) against 3 external loads. The push-off distance (HpO), jump height (Hmax), maximum force (Fmax) and maximum power (Pmax) were obtained from force platform recordings. The HpO during the SJ(pref) (43.4 +/- 6.4 cm) was always between SJ90 (44.3 +/- 4.8 cm) and SJ100 (40.5 +/- 4.2 cm). The magnitudes of Hmax, Fmax and Pmax were comparable or higher during the SJ(pref). The increase of the knee angle was associated with larger values of Fmax and Pmax, but no significant differences were observed for Hmax. An acceptable reliability was observed for HpO (coefficient of variation [CV] lt = 5.09% and intraclass correlation coefficient [ICC] gt = 0.78), Hmax (CV lt = 6.06% and ICC gt = 0.84), Fmax (CV lt = 3.25% and ICC gt = 0.96) and Pmax (CV lt = 2.93% and ICC gt = 0.96). Reliability did not systematically differ between the 4 SJ types. In conclusion, the higher magnitudes and comparable reliability of the performance variables obtained during the SJ(pref) support its use for testing lower-body ballistic performance against different loads. PB - Routledge Journals, Taylor & Francis Ltd, Abingdon T2 - Sports Biomechanics T1 - Magnitude and reliability of mechanical outputs obtained during loaded squat jumps performed from different knee angles DO - 10.1080/14763141.2019.1618390 ER -
@article{ author = "Janićijević, Danica and Knežević, Olivera and Mirkov, Dragan M. and Perez-Castilla, Alejandro and Petrović, Miloš R. and Garcia-Ramos, Amador", year = "2019", abstract = "This study aimed to explore the effect of the knee angle and loading condition on the magnitude and reliability of squat jump (SJ) performance variables. Thirteen male sport sciences students performed in a random order 4 SJ types (knee angle of 80o [SJ80], 90o [SJ90], 100o [SJ100], and self-preferred [SJ(pref)]) against 3 external loads. The push-off distance (HpO), jump height (Hmax), maximum force (Fmax) and maximum power (Pmax) were obtained from force platform recordings. The HpO during the SJ(pref) (43.4 +/- 6.4 cm) was always between SJ90 (44.3 +/- 4.8 cm) and SJ100 (40.5 +/- 4.2 cm). The magnitudes of Hmax, Fmax and Pmax were comparable or higher during the SJ(pref). The increase of the knee angle was associated with larger values of Fmax and Pmax, but no significant differences were observed for Hmax. An acceptable reliability was observed for HpO (coefficient of variation [CV] lt = 5.09% and intraclass correlation coefficient [ICC] gt = 0.78), Hmax (CV lt = 6.06% and ICC gt = 0.84), Fmax (CV lt = 3.25% and ICC gt = 0.96) and Pmax (CV lt = 2.93% and ICC gt = 0.96). Reliability did not systematically differ between the 4 SJ types. In conclusion, the higher magnitudes and comparable reliability of the performance variables obtained during the SJ(pref) support its use for testing lower-body ballistic performance against different loads.", publisher = "Routledge Journals, Taylor & Francis Ltd, Abingdon", journal = "Sports Biomechanics", title = "Magnitude and reliability of mechanical outputs obtained during loaded squat jumps performed from different knee angles", doi = "10.1080/14763141.2019.1618390" }
Janićijević, D., Knežević, O., Mirkov, D. M., Perez-Castilla, A., Petrović, M. R.,& Garcia-Ramos, A.. (2019). Magnitude and reliability of mechanical outputs obtained during loaded squat jumps performed from different knee angles. in Sports Biomechanics Routledge Journals, Taylor & Francis Ltd, Abingdon.. https://doi.org/10.1080/14763141.2019.1618390
Janićijević D, Knežević O, Mirkov DM, Perez-Castilla A, Petrović MR, Garcia-Ramos A. Magnitude and reliability of mechanical outputs obtained during loaded squat jumps performed from different knee angles. in Sports Biomechanics. 2019;. doi:10.1080/14763141.2019.1618390 .
Janićijević, Danica, Knežević, Olivera, Mirkov, Dragan M., Perez-Castilla, Alejandro, Petrović, Miloš R., Garcia-Ramos, Amador, "Magnitude and reliability of mechanical outputs obtained during loaded squat jumps performed from different knee angles" in Sports Biomechanics (2019), https://doi.org/10.1080/14763141.2019.1618390 . .