0000000000405393
AUTHOR
Olli Okkonen
showing 3 related works from this author
Biomechanical comparison between sprint start, sled-pulling and selected squat type exercises
2012
The purpose of the present study was to compare kinetics, kinematics and muscle activity between sprint start, sled-pulling and selected squat type exercises and also to examine how different exercises and variables correlate with the performance time of the block start (10 m). Nine male athletes (4 sprinters, 3 decathlonists, 1 long jumper and 1 triple jumper; mean ± SD; age = 24.9 ± 3.9 yr; height = 180.4 ± 5.9 cm; weight = 80.3 ± 7.5 kg; 100 m record = 11.35 ± 0.29 s) performed measurements and different force-time, electromyographic (EMG) and kinematic variables were compared to sprint start. Most of the comparison was done to the block phase (the phase of force production towards start…
Sadan metrin lajianalyysi: erityisesti biomekaniikka ja valmennuksen ohjelmointi
2010
Okkonen, Olli. Sadan metrin lajianalyysi: erityisesti biomekaniikka ja valmennuksen ohjelmointi. Valmennus- ja testausoppi, VTE.A008. Liikuntabiologian laitos, Jyväskylän yliopisto, s. 66. 2009. Biomekaniikka. Sadan metrin juoksu voidaan jakaa ainakin neljään vaiheeseen: telinevaihe, kiihdytysvaihe, maksiminopeuden vaihe ja hidastumisvaihe. Telinevaiheen voimantuottoaika hyvillä pikajuoksijoilla on yleensä 310 370 ms, josta etujalka osallistuu voimantuottoon lähes koko ajan ja takajalka noin 120 180 ms. Eri tutkimuksissa etujalan polvikulman keskiarvoiksi on saatu 89 111 ° ja takajalan 118 136 °. Hyvien ja keskitason juoksijoiden polvikulmissa valmiit-asennossa ei ole huomattu olevan merk…
Biomechanical Comparison Between Sprint Start, Sled Pulling, and Selected Squat-Type Exercises
2013
The purpose of this study was to compare kinetics, kinematics, and muscle activity among sprint start, sled pulling, and selected squat-type exercises (countermovement jumps [CMJs] and 1/2-squats with various loads) and also to examine how these exercises correlate with the performance time of the block start (10 m). Nine male athletes (4 sprinters, 3 decathlonists, 1 long jumper, and 1 triple jumper: age = 24.9 ± 3.9 years; 100-m record = 11.35 ± 0.29 seconds; track and field training years = 11.8 ± 3.1 years) volunteered as subjects. The comparisons were made with regard to the block phase (the phase of force production toward starting blocks) of the block start. In nearly all exercises, …