Strength training and changes in the dynamics of running economy
| Autoři | |
|---|---|
| Rok publikování | 2014 |
| Druh | Článek ve sborníku |
| Konference | Special Issue; Supplementary Issue: 8th INSHS International Christmas Sport Scientific Conference, 5-7 December 2013 |
| Fakulta / Pracoviště MU | |
| Citace | |
| Doi | http://dx.doi.org/10.14198/jhse.2014.9.Proc1.34 |
| Obor | Sport a aktivity volného času |
| Klíčová slova | oxygen uptake; acute effect; plyometric; maximum power |
| Popis | The aim of this study was to examine an acute effect of 4RM training and plyometric training (PT) on running economy (RE; O2 consumption) in endurance runners during a 48 hour interval. Eight performance runners (age 25.4±1.4 years) completed a maximum strength training (4RM) of lower limbs (3 sets, rest 2 min, 5 exercises) and subsequently underwent a RE test on a treadmill (speed 8, 10 and 12 km·h-1) at three time intervals (0, +24 and +48 h) after the training. We found that the average VO2·BM-1·min-1 and VO2·BM-1·min-1 at the given speed increased from baseline (a pretest 48 h before the strength intervention) by 2.3-5.6% and culminated after 24 h. These changes in RE after the strength intervention were not statistically significant, when compared to the pretest (48 h before the intervention). The second investigation was conducted in seven runners (age 25±1.6 years). This time the intervention was plyometric (7 sec load, rest 2 min, maximum intensity, 3 sets, 6 exercises on the dominant lower limb). We found that the average VO2·BM-1·min-1 and VO2·BM-1·min-1 at given speeds at intervals 0, +24 and +48 h did not increase, when compared to the pretest (p < 0.05; max +1%). These minimal changes probably resulted from the design of the PT, which had not a sufficiently destructive effect on muscle cells. The comparison of these two investigations indicates a stronger (although statistically insignificant) deterioration of RE after 4RM training versus PT. |
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