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Titolo:
NEUROMUSCULAR FUNCTIONING OF ATHLETES AND NONATHLETES IN THE DROP JUMP
Autore:
VIITASALO JT; SALO A; LAHTINEN J;
Indirizzi:
RES INST OLYMPIC SPORTS,RAUTPOHJANKATU 6 FIN-40700 JYVASKYLA FINLAND UNIV EXETER,SCH EDUC EXETER EX4 4RJ DEVON ENGLAND
Titolo Testata:
European journal of applied physiology and occupational physiology
fascicolo: 5, volume: 78, anno: 1998,
pagine: 432 - 440
SICI:
0301-5548(1998)78:5<432:NFOAAN>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
STRETCH-SHORTENING CYCLE; LEG EXTENSOR MUSCLES; ELASTIC ENERGY; MECHANICAL EFFICIENCY; HUMAN LOCOMOTION; REFLEX; STIFFNESS; EXERCISE; ANKLE; SLOW;
Keywords:
JUMPING; STRETCH LOAD; STRETCH SPEED; SPECIFICITY; TRAINING HISTORY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
51
Recensione:
Indirizzi per estratti:
Citazione:
J.T. Viitasalo et al., "NEUROMUSCULAR FUNCTIONING OF ATHLETES AND NONATHLETES IN THE DROP JUMP", European journal of applied physiology and occupational physiology, 78(5), 1998, pp. 432-440

Abstract

Tn many sports vertical jumping is important. This study compared neuromuscular functioning of the lower extremity muscles together with some kinetic and kinematic parameters before and during ground contact in drop jumps from two heights [0.4 m (DJ40) and 0.8 m (DJ80)] in 7 highly trained triple-jumpers and 11 physically active controls. The triple-jumpers jumped 32% higher in DJ40 and 34% higher in DJ80, had shorter braking and total contact times, and greater average and peak vertical ground reaction forces than the controls. In both drop jumps in the electromyogram pre-activity of the vastus lateralis and gastrocnemius muscles started earlier in the jumpers than in the controls. For thecontrol group the increase in dropping height was associated with a decrease in the propulsion force, and resulted in more extended knee and ankle angles at touch down and more flexed angles at the deepest position than for the jumpers. All angular displacements for DJS0 were larger than for DJ40 in the control group. The triple jumpers and control subjects differed with respect to their neuromuscular functioning inthe drop jump exercise and they responded in a different way to the increase in dropping height.

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Documento generato il 15/07/20 alle ore 19:59:21