| Autor: |
Zemková, Erika, Dzurenková, Dagmar, Ollé, Gábor, Kovâcikovâ, Zuzana |
| Předmět: |
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| Zdroj: |
Serbian Journal of Sports Sciences; Dec2010, Vol. 4 Issue 4, p161-168, 8p, 1 Color Photograph, 9 Graphs |
| Abstrakt: |
The study compares the cardiorespiratory parameters during and after upper and lower body resistance exercises performed under stable and unstable conditions, respectively. A group of 16 PE students performed randomly on different days 6 sets of 8 reps (with 2 minutes of rest period in-between) of a) barbell chest presses on either the bench or the Swiss ball, and b) barbell squats on either a stable surface or the Bosu ball (both with 70% of 1RM). Cardiorespiratory parameters were monitored by means of the breath-by-breath system Spiroergometry CS 200. The kinetics of most of the cardiorespiratory parameters revealed only slight changes during the active lifting period compensated by a rather pronounced increase in the early phase of recovery. More specifically, oxygen uptake after both stability and instability resistance exercises increased and it was only after about 30 to 40 seconds that a gradual decrease back to the resting level set in. On the other hand, heart rates reached the maximum at the end of exercising and started to decline immediately in the recovery phase. Even more delayed was the response of oxygen pulse which remained relatively unchanged during exercise and started to increase in recovery reaching the maximum after some 40 to 50 seconds. However, the values obtained during the upper-limb exercises were significantly higher under unstable versus stable conditions, whereas no differences were observed for the lower-limb exercises. Moreover, a gradual increase in cardiorespiratory parameters from the 1st to the 6th set was observed during both exercises performed on a stable as well as on an unstable surface (about 10-20%). These findings indicate that instability chest presses represent a more intensive stimulus for cardiorespiratory functions than those performed on a stable surface. In contrast, cardiorespiratory response to squats is similar under stable and unstable conditions. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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