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- Title
Biomechanical Characteristics of Jumping.
- Authors
Aura, Ossi; Viitasalo, Jukka T.
- Abstract
Four track and field athletes were subjects in a study that analyzed seven jumping exercises and flop-style high jump takeoffs for ground reaction forces, knee angular kinematics, and electromyographic activities of knee extensor musculature. The ground contact times varied between 177±13 (flop) and 278±25 ms (standing five jumps). The peak ground contact forces were from 5002±130 N (special drop jump) to 8202±901 N (running five hops). Average knee angular velocities were highest in the eccentric phase of the flop takeoff (ϖ=7.1±2.1 rad × s-1). Electromyographic activities before the ground contact and during the eccentric phase of contact were highest in the flop-style high jump, while during the concentric phase of contact a special drop jump exercise showed the highest activity. Preactivity IEMG correlated with the eccentric IEMG. force, and knee angular velocity positively and with the contact time negatively (p<0.001). while eccentric IEMG correlated with the eccentric force and angular velocity positively and with the contact time negatively (p<0.001).
- Subjects
JUMPING; TRACK &; field athletes; MUSCLES; GROUND reaction forces (Biomechanics); SPORTS biomechanics
- Publication
International Journal of Sport Biomechanics, 1989, Vol 5, Issue 1, p89
- ISSN
0740-2082
- Publication type
Article
- DOI
10.1123/ijsb.5.1.89