Muscle metabolism during 30, 60, and 90 s of maximal cycling on an air-braked ergometer

This study examined the suitability of the Wingate test as a means of assessing the maximal oxygen deficit (MOD), and the influence of the anaerobic capacity on the fraction of the MOD used during a 30- and a 45-s Wingate test in 19 male subjects. The MOD incurred in constant-intensity supramaximal exercise was higher (P < 0.01) than that for the 45-s and 30-s Wingate tests [68.6 (3.4) vs 60.9 (2.2) and 53.7 (1.6) ml x kg(-1), respectively], corresponding to a 10% higher value for the 45-s compared to that for the 30-s test (P < 0.001). A close correlation was found to occur between MOD and the oxygen deficit incurred during the 30- and 45-s Wingate tests, as well as between both all-out tests (r = 0.86-0.90; P < 0.001). The oxygen deficit accumulated during the first 30 s of the 45-s Wingate test was similar to that accumulated during the 30-s Wingate test. The intraclass correlation coefficient for the oxygen deficit after 30 s of all-out exercise (two treatments) was 0.96. The higher the MOD the lower was its fractional recruitment during the 30-s (r = -0.88, P < 0.001) and during the 45-s (r = -0.74, P < 0.01) Wingate tests. In conclusion, 80-90% as an assessment of the oxygen deficit incurred during a Wingate test is valid as an estimate of the anaerobic capacity. The fraction of the anaerobic capacity used in a 30- and 45-s all-out test is inversely related to the anaerobic capacity.

Section: Discussionsupporting

confidence: 76%

Fractional use of anaerobic capacity during a 30- and a 45-s Wingate test

Calbet

Chavarren

Dorado

1997

“…1) and there was no difference in MAOD (Table 2), which is a noninvasive method for estimating the phosphagen and anaerobic glycolytic contributions to energy metabolism during this type of exercise (Withers et al 1991). The results of a number of studies (Bangsbo et al 1992;Ren et al 1990;Spencer and Katz 1991;Symons and Jacobs 1989;Vandenberghe et al 1995) suggest that glycogenolysis during intense exercise is not significantly altered by pre-exercise muscle glycogen availability.…”

Section: Discussionmentioning

confidence: 95%

Effect of muscle glycogen availability on maximal exercise performance

Hargreaves

Finn

Withers

et al. 1997

Self Cite

This investigation determined the influence of pre-exercise muscle glycogen availability on performance during high intensity exercise. Nine trained male cyclists were studied during 75 s of all-out exercise on an air-braked cycle ergometer following muscle glycogen-lowering exercise and consumption of diets (energy content approximately 14 MJ) that were either high (HCHO(80% CHO) or low (LCHO-25% CHO) in carbohydrate content. The exercise-diet regimen was successful in producing differences in pre-exercise muscle glycogen contents [HCHO: 578(SEM 55) mmol x kg(-1) dry mass; LCHO: 364 (SEM 58) P < 0.05 mmol x kg(-1) dry mass]. Despite this difference in muscle glycogen availability, there were no between trial differences for peak power [HCHO 1185 (SEM 50)W, LCHO 1179 (SEM 48)W], mean power [HCHO 547 (SEM 5)W, LCHO 554 (SEM 8)W] and maximal accumulated oxygen deficit [HCHO 54.4 (SEM 2.3) ml x kg(-1), LCHO 54.6 (SEM 2.0) ml x kg(-1)]. Postexercise muscle lactate contents (HCHO 95.9 (SEM 4.6) mmol x kg(-1) dry mass, LCHO 82.7 (SEM 12.3) mmol x kg(-1) dry mass, n = 8] were no different between the two trials, nor were venous blood lactate concentrations immediately after and during recovery from exercise. These results would indicate that increased muscle glycogen availability has no direct effect on performance during all-out high intensity exercise.

“…Although several studies (Calbet et al 1997;Seresse et al 1988;Withers et al 1991) have reported comparable _ V O 2 values during stepwise incremental and Wingate exercise tests of various durations, regression equations for predicting the peak _ V O 2 during incremental exercise from Wingate test values are not available. The current ®ndings indicated a strong relationship between the peak _ V O 2 values during the incremental and 45 s Wingate tests (Fig.…”

Section: Biomechanical Responsesmentioning

confidence: 96%

Oxygenation trends in vastus lateralis muscle during incremental and intense anaerobic cycle exercise in young men and women

Bhambhani

Maikala

Esmail

2001

The purposes of this study were to compare the acute cardiorespiratory responses and muscle oxygenation trends during incremental cycle exercise to exhaustion with those observed during 30 s and 45 s Wingate tests in healthy men and women, and to examine the relationships between selected variables among these tests. Seventeen healthy junior badminton players, nine men [mean age, height, body mass and maximal oxygen uptake (VO2max) were 15.8 (SD 0.8) years, 1.73 (SD 0.08) m, 65.6 (SD 6.3) kg and 50.6 (SD 6.9) ml x kg(-1) x min(-1) respectively] and eight women [mean age, height, body mass and VO2max were 16.6 (SD 1.0) years, 1.65 (SD 0.03) m, 62.7 (SD 4.5) kg and 42.0 (SD 5.0) ml x kg(-1) x min(-1) respectively] completed a stepwise incremental exercise test to voluntary exhaustion and two Wingate tests lasting 30 s and 45 s in three separate sessions in random order. Cardiorespiratory responses were monitored breath-by-breath using a metabolic cart interfaced with an electrocardiogram. Tissue absorbancy trends were continuously recorded from the right vastus lateralis muscle using dual wavelength near infrared spectroscopy. Oxygen uptake and heart rate were significantly higher during the incremental test when compared to the two Wingate tests in the men and women. However, the oxygen pulse (oxygen utilization per heart beat, i.e., the product of stroke volume and arterio-venous oxygen difference) was not significantly different among the three tests in both sexes. The minimal tissue absorbancy, an index of muscle deoxygenation, was also not significantly different among the three tests in both sexes. Significant relationships were observed for the oxygen uptake (r2=0.72) and oxygen pulse (r2=0.60) between the incremental and 45 s Wingate tests in the sample for both sexes combined. The minimal tissue absorbancy, however, was not significantly related between the two tests. It was concluded that the significantly higher oxygen uptake during the incremental test was due to the higher heart rate because: firstly, oxygen pulse was not significantly different among the three tests, and secondly, peripheral factors, as indicated by the changes in muscle oxygenation, were not significantly different among the three test conditions. Although the peak values of the oxygen pulse during the incremental and 45 s Wingate tests were significantly correlated, the common variance of the minimal tissue absorbancy measurements between these two tests was quite low, suggesting considerable variation in the peripheral contribution during these two tests.