Influence of training status on maximal accumulated oxygen deficit during all-out cycle exercise

Gastin, Paul B.; Lawson, David L

doi:10.1007/bf00392038

Cited by 46 publications

(46 citation statements)

References 33 publications

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“…In a given exercise bout, the cross-over point to predominantly aerobic energy supply may occur between 20 to 30 seconds, [76,89] with the aerobic contribution to each continuing period of exercise increasing while the anaerobic contribution continues to diminish. While not seemingly so, this is in fact consistent with the suggestion that a maximal effort of about 75 seconds derives equal energy from both the aerobic and anaerobic energy systems.…”

Section: Energy System Interaction and Contributionmentioning

confidence: 99%

“…Small, insignificant differences exist for training status. Table III provides 5 contrasting examples, with estimates of the sequential energy system contribution during 90 seconds of all-out exercise, [76] 800 and 1500m running, [89] and exercise to exhaustion during cycling at 110% V . O 2max [40] and one-legged, knee-extension at 65W.…”

Section: Energy System Interaction and Contributionmentioning

confidence: 99%

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Energy System Interaction and Relative Contribution During Maximal Exercise

Gastin¹

2001

Sports Medicine

714

517

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Section: Energy System Interaction and Contributionmentioning

confidence: 99%

Section: Energy System Interaction and Contributionmentioning

confidence: 99%

Energy System Interaction and Relative Contribution During Maximal Exercise

Gastin¹

2001

Sports Medicine

714

517

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“…A plateau in V O 2 was deemed when V O 2 did not increase by more than 50 ml during the last 2 min of exercise. 20 Calculating the VO 2 slow component The magnitude of the SC has previously been calculated using several different approaches. Mathematical modelling based on both linear and double exponential models 21,22 has been used, as well as subtracting the V O 2 obtained after 3 min of exercise from either the V O 2 measured after 6 min of exercise or the end-exercise V O 2 .…”

Section: Slow Component Of V á O 2 Kineticsmentioning

confidence: 99%

Slow component of V̇O2 kinetics: the effect of training status, fibre type, UCP3 mRNA and citrate synthase activity

et al. 2002

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OBJECTIVE:In healthy individuals performing constant-load exercise at intensities above the lactate threshold a secondary rise in pulmonary oxygen uptake (V O 2 ) occurs. V O 2 reaches a maximum and exhaustion rapidly prevails for a range of work rates lower than the maximal work rate achieved during a conventional rapid-incremental test. This phenomenon is called the slow component (SC) of V O 2 kinetics and represents an increase in V O 2 without an increase in work rate. Although still under debate, the magnitude of the SC is believed to be associated with the percentage of type II muscle fibres and their recruitment. In this study we investigated the relationship between the magnitude of the relative SC, citrate synthase activity, UCP2 and UCP3 mRNA levels and muscle fibre composition in both endurance-trained and recreationally active subjects. METHOD: The magnitude of the relative SC was measured in 12 endurance-trained (Tr) and 15 recreationally active (RA) male subjects. The magnitude of the relative SC was determined as the difference between the end-exercise V O 2 and 3 min V O 2 divided by the difference between end-exercise V O 2 and baseline V O 2 . UCP2 and UCP3 mRNA expression in the vastus lateralis was measured by RT-PCR with b-actin mRNA used as an internal control. These values were also normalized against cytochromeb mRNA to control for training induced changes in mitochondria when comparing the Tr and RA groups. Type I, IIa and IIx skeletal muscle fibre composition was determined using a routine myosin ATPase histochemical staining technique. Citrate synthase (CS) activity was measured using spectrophotometric detection. RESULTS:The magnitude of the relative SC of the Tr group had the highest correlation with citrate synthase activity (r ¼ 7 0.90, P < 0.001) and that of the RA group with V O 2 peak (r ¼ 7 0.68, P < 0.01). For the Tr group other correlations with the magnitude of the relative SC included UCP3 mRNA levels (r ¼ 0.69, P < 0.05) and the percentage of type I fibres (r ¼ 7 0.58, P < 0.05), while for the RA group they included UCP3 mRNA (r ¼ 0.58, P < 0.05) and the percentage of type IIa muscle fibres (r ¼ 0.59, P < 0.05). The Tr subjects had a lower relative SC (P ¼ 0.04) and a lower expression of UCP2 (P ¼ 0.04), and UCP3 mRNA (P ¼ 0.01) than the RA subjects. When the groups were combined the magnitude of the relative SC correlated with UCP3 mRNA (r ¼ 0.70, P < 0.01), percentage of type IIa muscle fibres (r ¼ 0.60, P < 0.01) and V O 2 peak (r ¼ 7 0.73, P < 0.01). Additionally UCP3 mRNA correlated with the percentage of type IIa muscle fibres (r ¼ 0.63, P < 0.001). CONCLUSION: Citrate synthase activity and V O 2 peak are indicators of aerobic fitness. The high negative correlations between the magnitude of the relative SC and citrate synthase activity and V O 2 peak, of the Tr and RA subjects, respectively, suggests that the magnitude of the relative SC is inversely correlated with aerobic fitness. Additionally the correlations between UCP3 mRNA and the magnitude of the relative SC...

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“…However, at the last sprint, the anaerobic glycolysis and the PCr contributes approximately to 9% and 49% of the total ATP production 8 . Indeed, the energetic contributions during exercise changes according to the type of subjects used 34 , although, the above cited studies highlight the importance of the anaerobic capacity on the RS performance.…”

Section: Discussionmentioning

confidence: 99%

A influência de variáveis aeróbias e anaeróbias no teste de “sprints” repetidos

Aguiar

Raimundo

Lisbôa

et al. 2016

Rev. bras. educ. fís. esporte

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Intermittent sports are very popular and practiced by many people around the world. Such sports (e.g., soccer, rugby, tennis and others) require repeated sprint actions, that is, maximum or near-maximum e orts interspaced by short recovery times (< 60 seconds) [1][2][3][4][5] . Indeed, albeit the frequency/incidence of these actions are low 1, 5-7 , these brief periods are normally the decisive moments of the game. For better performance in the repeated sprints (RS), it is necessary that the subject covers a certain distance as fast as possible (i.e., within the shortest time) at the rst sprint and, then, be able to repeat a similar performance in a subsequent one 8 . However, the sprint total time increases throughout the RS, which determines the fatigue related with this activity. According to the above-cited evidences, some studies point out that RS involves the transfer of energy by the three energetic systems as well as periods of restitution and clearance of the substrates that in uences the energy production [8][9] . us, this activity is dependent on the dynamic integration among the physiological systems (e.g., cardiovascular, respiratory and neuromuscular). AbstractThis study aimed to determine the manner and degree to which aerobic and anaerobic variables infl uence repeated running sprint performance and ability. Twenty four males (sprinters = 8, endurance runners = 8 and physical active subjects = 8) performed in a synthetic track the following tests: 1) incremental test to determine the VO 2 max and the maximum aerobic velocity (MAV); 2) constant velocity test performed at 110% of MAV to determine the VO 2 kinetics and the maximum accumulated oxygen defi cit (MAOD); 3) repeated sprint test (10 sprints of 35-m interspersed by 20s) to determine sprint total time (TT), best sprint time (BT) and score decrement (Sdec). Between-groups comparisons and the correlations between variables were analyzed by one-way ANOVA with a Tukey post-hoc tests and Pearson correlation, respectively. TT was signifi cantly different among all groups (sprinters = 49.5 ± 0.8 s; endurance = 52.6 ± 3.1 s; active = 55.5 ± 2.6 s) and Sdec was signifi cantly lower in endurance runners as compared with sprinters and physical active subjects (sprinters = 8.9 ± 2.1%; endurance = 4.0 ± 2.0%; active = 8.4 ± 4.4%). TT correlated signifi cantly with BT (r = 0.85, p < 0.01) and MAOD (r = -0.54, p < 0.01). Moreover, Sdec was signifi cantly correlated with aerobic parameters (VO 2 max, r = -0.58, p < 0.01; MAV, r = -0.59, p < 0.01; time constant tau, r = 0.45, p = 0.03). In conclusion, although the aerobic parameters have an important contribution to RS ability, RS performance is mainly infl uenced by anaerobic parameters.

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Influence of training status on maximal accumulated oxygen deficit during all-out cycle exercise

Cited by 46 publications

References 33 publications

Energy System Interaction and Relative Contribution During Maximal Exercise

Energy System Interaction and Relative Contribution During Maximal Exercise

Slow component of V̇O2 kinetics: the effect of training status, fibre type, UCP3 mRNA and citrate synthase activity

A influência de variáveis aeróbias e anaeróbias no teste de “sprints” repetidos

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