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Pregled bibliografske jedinice broj: 371281

Are acute effects of maximal dynamic contractions on upper-body ballistic performance load specific?


Marković, Goran; Šimek, Sanja; Bradić, Asim
Are acute effects of maximal dynamic contractions on upper-body ballistic performance load specific? // Journal of strength and conditioning research, 22 (2008), 6; 1811-1815 (međunarodna recenzija, članak, znanstveni)


Naslov
Are acute effects of maximal dynamic contractions on upper-body ballistic performance load specific?

Autori
Marković, Goran ; Šimek, Sanja ; Bradić, Asim

Izvornik
Journal of strength and conditioning research (1064-8011) 22 (2008), 6; 1811-1815

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Complex training; postactivation potentiation; muscle power; throwing

Sažetak
This study investigated the acute effects of upper-body maximal dynamic contractions on maximal throwing speed with 0.55 kg and 4 kg medicine balls. It was hypothesized that heavy preloading would transiently improve throwing performance only when overcoming the heavier of the two loads. Twenty-three male volunteers were randomly allocated into experimental (n=11) and control (n=12) groups. Both groups performed initial and final seated medicine ball throws from the chest and the maximal medicine ball speed was measured by means of a radar gun. Between the two measurements, the control group rested passively for 15 min, while the experimental group performed 3 sets of 3 repetition maximum bench presses. For the 0.55 kg load, a 2 × 2 repeated measures analysis of variance (ANOVA) revealed no significant effect of time × group interaction (P = 0.22), as well as no significant time (P = 0.22) or group (P = 0.72) effects. In contrast, for the 4 kg load, a significant time × group interaction (P = 0.004), as well as a significant time (P = 0.035), but not group (P = 0.77) effect was observed. Analysis of simple main effects revealed that the experimental group significantly (8.3% ; P < 0.01) improved maximal throwing speed with the 4 kg load. These results support our research hypothesis and suggest that the acute effects of heavy preloading on upper-body ballistic performance might be load-specific. In practical sense, our findings suggest that the use of upper-body heavy resistance exercise prior to ballistic throwing movements against moderate external loads might be an efficient training strategy for improving athlete&#8217; s upper-body explosive performance.

Izvorni jezik
Engleski

Znanstvena područja
Pedagogija



POVEZANOST RADA


Projekt / tema
034-0342607-2623 - Mehanička funkcija mišića pri izvedbi balističkih pokreta (Goran Marković, )

Ustanove
Kineziološki fakultet, Zagreb

Časopis indeksira:


  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


Uključenost u ostale bibliografske baze podataka:


  • MEDLINE