Blood and muscle pH after maximal exercise in man

Hermansen, Lars; Jb, Osnes

doi:10.1152/jappl.1972.32.3.304

Cited by 288 publications

(151 citation statements)

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“…Similar to SWEET [21,23], BiSC involves brief intervals of positive work (i.e., 12 seconds of ascend), negative work (i.e., 8 seconds of descend) and produces a high respiratory rate (Table 2) yet at lower heart rates than previously reported for exercise to VO 2 max or PWR (Table 3) [5,11,[27][28][29].…”

Section: Discussionmentioning

confidence: 98%

Comparison of Two Stair Climbing Protocols for Smokers

Giménez¹,

Saavedra²

2017

IJRDM

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Section: Discussionmentioning

confidence: 98%

Comparison of Two Stair Climbing Protocols for Smokers

Giménez¹,

Saavedra²

2017

IJRDM

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“…Finally, in spite of the important elevated energy transfer of the anaerobic system on the RS performance, this transfer could increase the Method Subjects fatigue associated with this type of activity, given that, metabolic byproducts related with fatigue cumulates during the energy transfer by this energetic system [25][26] . Di erently, some researches have demonstrated negative signi cant correlations between aerobic parameters and decrease in performance 10-11, 13, 15, 20 .…”

Section: Introductionmentioning

confidence: 99%

“…It is important to highlight that consequently to the energy transfer by the glycolytic system, H+ ions and lactate are produced, inducing an intramuscular acidosis 36 and, consequently, performance decrease [25][26] . Additionally, albeit the importance of the MAOD on RS performance, we observed that this variable also moderately correlated with Sdec on the RS.…”

mentioning

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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“…In exercises with the mentioned characteristics above, the high H + ions concentration has been mentioned as one of the main causes of muscular fatigue (4)(5) . The decrease of the intramuscular pH is related with a series of events which harm the muscular contraction-relaxation and energy obtaining processes (4)(5)(6) .…”

Section: Introductionmentioning

confidence: 99%

“…The decrease of the intramuscular pH is related with a series of events which harm the muscular contraction-relaxation and energy obtaining processes (4)(5)(6) . In this context, several studies have researched the ergogenic action of alkaline substances in activities of high intensity and short duration.…”

Section: Introductionmentioning

confidence: 99%

A ingestão de bicarbonato de sódio pode contribuir para o desempenho em lutas de judô?

Artioli

Coelho

Benatti

et al. 2006

Rev Bras Med Esporte

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The objective of this study was to investigate the effect of the NaHCO 3 ingestion on the judo performance. Six male athletes ingested 0.3 g • kg -1 body weight of NaHCO 3 or CaCO 3 (placebo) 2 h before 3 fights of 5 min, with 15 min recovery. Immediately afterwards, and 15 min after each fight, the athletes related their perceived exertion. The blood lactate concentration was verified in rest, after warming up, 0, 3, 5, 7, 10 and 15 min after each fight. The same experimental protocol was repeated twice by each athlete, except for the ingested substance. The study adopted the counterbalanced double-blind model. There was no significant difference for the performance variables. The perceived exertion did not differ among the treatments, and the blood lactate concentration was significantly greater (p < 0.05) after NaHCO 3 ingestion in the first moments of the protocol. In conclusion, the ergogenic effects of NaH-CO 3 are not enough to contribute to the improvement of the performance in judo fights. However, the model limitations must be considered when generalizing these results. Future studies should use other tools to evaluate the performance in judo.

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Blood and muscle pH after maximal exercise in man

Cited by 288 publications

References 0 publications

Comparison of Two Stair Climbing Protocols for Smokers

Comparison of Two Stair Climbing Protocols for Smokers

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

A ingestão de bicarbonato de sódio pode contribuir para o desempenho em lutas de judô?

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