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Effect of Prior Exercise on the V·O2/Work Rate Relationship During Incremental Exercise and Constant Work Rate Exercise
| Content Provider | Scilit |
|---|---|
| Author | Marles, A. Mucci, P. Legrand, R. Betbeder, D. Prieur, F. |
| Copyright Year | 2005 |
| Abstract | The disproportionate increase in $V·O_{2}$ (“extra $V·O_{2}$”) reported at elevated intensity during incremental exercise (IE) might result from the same physiological mechanisms as the $V·O_{2}$ slow component observed during heavy constant work rate exercise (CWRE). Moreover, it has been demonstrated that prior heavy exercise can diminish the $V·O_{2}$ slow component. The aim of this study was to evaluate whether prior heavy exercise also alters the “extra $V·O_{2}$” during IE. Ten trained sprinters performed three tests on a cycle ergometer: Test 1 was an IE; Test 2 consisted of six minutes of a CWRE (90 % of $V·O_{2max}$) followed by six minutes at 35 W and by an IE and Test 3 was composed of two CWRE of six minutes separated by six minutes of exercise at 35 W. For each IE, the slope and the intercept of the $V·O_{2}$/work rate relationship were calculated by linear regression using data before the first Ventilatory Threshold (pre-VT1 slope). The difference between $V·O_{2max}$ measured and $V·O_{2max}$ expected using the pre-LT slope was calculated $(ΔV·O_{2}$). We also calculated the difference between $V·O_{2}$ at min five and $V·O_{2}$ at min three during CWRE of Test 3 $(ΔV·O_{2(5′ - 3′)}$). $V·O_{2max}$ was significantly higher than $V·O_{2exp}$ during IE of Test 1 and Test 2. Δ $V·O_{2}$ during IE did not differ between Test 1 and Test 2 (+ 259 ± 229 ml · $min^{-1}$ vs. + 222 ± 221 ml · $min^{-1}$). During Test 3, six subjects achieved five minutes of exercise during the second CWRE and Δ $V·O_{2(5′ - 3′)}$ was significantly decreased during the second CWRE (338 ± 65 ml · $min^{-1}$ vs. 68 ± 98 ml · $min^{-1}$, n = 6). These results demonstrate that the amplitude of the “extra $V·O_{2}$” during IE was not affected by prior exercise, whereas the slow component of $V·O_{2}$ evaluated by Δ $V·O_{2(5′ - 3′)}$ during CWRE was lowered. This implies that prior exercise does not have the same effect on the slow component of $V·O_{2}$ and on the “extra $V·O_{2}$”. Therefore we were unable to demonstrate a relationship between the $V·O_{2}$ slow component and the $“extra-V·O_{2}$” phenomenon during IE. |
| Related Links | http://www.thieme-connect.de/products/ejournals/pdf/10.1055/s-2005-865665.pdf |
| Ending Page | 350 |
| Page Count | 6 |
| Starting Page | 345 |
| ISSN | 01724622 |
| e-ISSN | 14393964 |
| DOI | 10.1055/s-2005-865665 |
| Journal | International Journal of Sports Medicine |
| Issue Number | 5 |
| Volume Number | 27 |
| Language | English |
| Publisher | Georg Thieme Verlag KG |
| Publisher Date | 2005-07-11 |
| Access Restriction | Open |
| Subject Keyword | Journal: International Journal of Sports Medicine Sport Sciences V·o2 Slow Component V·o2/wr Relationship Incremental Exercise Constant Work Rate Exercise |
| Content Type | Text |
| Resource Type | Article |
| Subject | Orthopedics and Sports Medicine Physical Therapy, Sports Therapy and Rehabilitation Sports Science |
