Effect of Induced Alkalosis on the Power-Duration Relationship of "All-out" Exercise

Vanhatalo, Anni; McNaughton, Lars R.; Siegler, Jason; Jones, Andrew M.

doi:10.1249/mss.0b013e3181b71a4a

Cited by 54 publications

(59 citation statements)

References 43 publications

(119 reference statements)

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“…Therefore, ingestion of NaHCO3 following the initial exercise bout may be more appropriate to maximise post-exercise acid-base balance recovery compared to prior ingestion. Similarly, the use of the recovery window in the were still rising 60 min post NaHCO3 ingestion, which agrees with previous research displaying peak alkalosis occurs later than the time frame adopted in the present study (Carr et al, 2011b;Siegler et al, 2010). Therefore, if the recovery window was larger we may have seen a more superior state of alkalosis, and based on this premise, resulted in a more profound effect of NaHCO3 Gough et al, 2017).…”

Section: Discussionsupporting

confidence: 91%

Ingestion of Sodium Bicarbonate (NaHCO3) Following a Fatiguing Bout of Exercise Accelerates Postexercise Acid-Base Balance Recovery and Improves Subsequent High-Intensity Cycling Time to Exhaustion

Gough

Rimmer

Osler

et al. 2017

International Journal of Sport Nutrition and Exercise Metabolism

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This study evaluated the ingestion of sodium bicarbonate (NaHCO3) on postexercise acid-base balance recovery kinetics and subsequent high-intensity cycling time to exhaustion. In a counterbalanced, crossover design, nine healthy and active males (age: 23 ± 2 years, height: 179 ± 5 cm, body mass: 74 ± 9 kg, peak mean minute power (Wpeak) 256 ± 45 W, peak oxygen uptake (V̇O2peak) 46 ± 8 ml.kg-1.min-1) performed a graded incremental exercise test, two familiarization and two experimental trials. Experimental trials consisted of cycling to volitional exhaustion (TLIM1) at 100% WPEAK on two occasions (TLIM1 and TLIM2) interspersed by a 90 min passive recovery period. Using a double-blind approach, 30 min into a 90 min recovery period participants ingested either 0.3 g.kg-1 body mass sodium bicarbonate (NaHCO3) or a placebo (PLA) containing 0.1 g.kg-1 body mass sodium chloride (NaCl) mixed with 4 ml.kg-1 tap water and 1 ml.kg-1 orange squash. The mean differences between TLIM2 and TLIM1 was larger for PLA compared with NaHCO3 (-53 ± 53 vs. -20 ± 48 s; p = .008, d = 0.7, CI =-0.3, 1.6), indicating superior subsequent exercise time to exhaustion following NaHCO3. Blood lactate [Bla-] was similar between treatments post TLIM1, but greater for NaHCO3 post TLIM2 and 5 min post TLIM2. Ingestion of NaHCO3 induced marked increases (p < .01) in both blood pH (+0.07 ± 0.02, d = 2.6, CI = 1.2, 3.7) and bicarbonate ion concentration [HCO3-] (+6.8 ± 1.6 mmo.l-1, d = 3.4, CI = 1.8, 4.7) compared with the PLA treatment, before TLIM2. It is likely both the acceleration of recovery, and the marked increases of acid-base after TLIM1 contributed to greater TLIM2 performance compared with the PLA condition.

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Section: Discussionsupporting

confidence: 91%

Ingestion of Sodium Bicarbonate (NaHCO3) Following a Fatiguing Bout of Exercise Accelerates Postexercise Acid-Base Balance Recovery and Improves Subsequent High-Intensity Cycling Time to Exhaustion

Gough

Rimmer

Osler

et al. 2017

International Journal of Sport Nutrition and Exercise Metabolism

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“…The NaHCO 3 -ingestion resulted in an elevated blood buffering status prior to the first Wingate test, with that elevation being sustained throughout the following WTs. The results of the present study, in agreement with other investigations (Parry-Billings and MacLaren 1986; Stephens et al 2002;Vanhatalo et al 2010;Zabala et al 2008), demonstrate no ergogenic effect of sodium bicarbonate ingestion on high-intensity exercise performance, despite significant blood alkalosis. Other studies have reported performance improvements, due to an ergogenic benefit of NaHCO 3 -supplementation during multiple bouts of high-intensity exercise (Bishop and Claudius 2005;Bishop et al 2004;Douroudos et al 2006;Price et al 2003).…”

Section: Discussionsupporting

confidence: 93%

“…Moreover, the highest value of cycling work and peak power were achieved with that dose. For the present investigation we chose a dose of 0.3 g kg -1 body weight, extensively used previously (Requena et al 2005;Siegler and Hirscher 2010;Stephens et al 2002;Vanhatalo et al 2010;Zabala et al 2008) and proposed to be the optimal amount to be ergogenic (Hollidge-Horvat et al 2000;Linderman and Fahey 1991;McNaughton et al 2008;Stephens et al 2002) and the most appropriate to obtain a blood alkalosis in human without side effects (i.e., gastrointestinal distress) (Vanhatalo et al 2010). Thus, the observed lack of improvement in WT performance in the present study may consequently not be due to the sodium bicarbonate administration protocol used, and perhaps the improvements observed in other studies (Douroudos et al 2006;Price et al 2003;Siegler and Hirscher 2010) may be partly due to the type of ingestion (drink solution).…”

Section: Discussionmentioning

confidence: 99%

Bicarbonate ingestion has no ergogenic effect on consecutive all out sprint tests in BMX elite cyclists

et al. 2011

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The aim of the present study was to examine the effect of sodium bicarbonate ingestion on consecutive "all out" sprint tests, analyzing the acid-base status and its influence on performance and perceived effort. Ten elite bicycle motocross (BMX) riders (20.7 ± 1.4 years, training experience 8-12 years) participated in this study which consisted of two trials. Each trial consisted of three consecutive Wingate tests (WTs) separated by 15 min recovery. Ninety minutes prior to exercise subjects ingested either NaHCO(3) (-) (0.3 g kg(-1) body weight) or placebo. Blood samples were collected for the assessment of blood acid-base status: bicarbonate concentration ([HCO(3) (-)]), pH, base excess (BE) and blood lactate concentration ([La(-)]). Performance variables of peak power (PP), mean power (MP), time to peak power and fatigue index were calculated for each sprint. Significant differences (p < 0.05) were observed in acid-base variables [pH before WT1: 7.47 ± 0.05 vs. 7.41 ± 0.03; [HCO(3) (-)] before WT1: 29.08 ± 2.27 vs. 22.85 ± 0.24 mmol L(-1) (bicarbonate vs. placebo conditions, respectively)], but there were not significant differences in performance variables between trials [PP WT1: 1,610 ± 373 vs. 1,599 ± 370 W; PP WT2: 1,548 ± 460 vs. 1,570 ± 428 W; PP WT3: 1,463 ± 361 vs. 1,519 ± 364 W. MP WT1: 809 ± 113 vs. 812 ± 108 W; MP WT2: 799 ± 135 vs. 799 ± 124 W; MP WT3: 762 ± 165 vs. 782 ± 118 W (bicarbonate vs. placebo conditions, respectively)]. Rating of perceived effort (RPE) was not influenced nor ratings of perceived readiness. Sodium bicarbonate ingestion modified significantly the blood acid-base balance, although the induced alkalosis did not improve the Wingate test performance, RPE and perceived readiness across three consecutive WTs in elite BMX cyclists.

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“…The low active recovery intensity used in this study was an attempt to increase muscle blood flow while not interrupting PCr resynthesis, since those stores are crucial for subsequent efforts [24, 25]. When considering that the half time recovery for PCr is rarely superior to 90 s during a passive recovery [26], we expected a more than optimum reload of PCr in the current study for both active and passive interventions.…”

Section: Discussionmentioning

confidence: 99%

Repeated High Intensity Bouts with Long Recovery: Are Bicarbonate or Carbohydrate Supplements an Option?

Stöggl

Torres‐Peralta

Çetin

et al. 2014

The Scientific World Journal

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The effects of varying recovery modes and the influence of preexercise sodium bicarbonate and carbohydrate ingestion on repeated high intensity performance, acid-base response, and recovery were analyzed in 12 well-trained males. They completed three repeated high intensity running bouts to exhaustion with intervening recovery periods of 25 min under the following conditions: sodium bicarbonate, active recovery (BIC); carbohydrate ingestion, active recovery (CHO); placebo ingestion, active recovery (ACTIVE); placebo ingestion, passive recovery (PASSIVE). Blood lactate (BLa), blood gases, heart rate, and time to exhaustion were collected. The three high intensity bouts had a duration of 138 ± 9, 124 ± 6, and 121 ± 6 s demonstrating a decrease from bout 1 to bout 3. Supplementation strategy had no effect on performance in the first bout, even with differences in pH and bicarbonate (HCO3 −). Repeated sprint performance was not affected by supplementation strategy when compared to ACTIVE, while PASSIVE resulted in a more pronounced decrease in performance compared with all other interventions. BIC led to greater BLa, pH, and HCO3 − values compared with all other interventions, while for PASSIVE the opposite was found. BLa recovery was lowest in PASSIVE; recovery in pH, and HCO3 − was lower in PASSIVE and higher in BIC.

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Effect of Induced Alkalosis on the Power-Duration Relationship of "All-out" Exercise

Abstract: Despite notably enhanced blood-buffering capacity, NaHCO3 ingestion had no effect on the W', the CP, or the overall performance during 3 min of all-out cycling. It is concluded that preexercise blood alkalosis had no influence on the power-duration relationship for all-out exercise.

Cited by 54 publications

References 43 publications

Ingestion of Sodium Bicarbonate (NaHCO3) Following a Fatiguing Bout of Exercise Accelerates Postexercise Acid-Base Balance Recovery and Improves Subsequent High-Intensity Cycling Time to Exhaustion

Ingestion of Sodium Bicarbonate (NaHCO3) Following a Fatiguing Bout of Exercise Accelerates Postexercise Acid-Base Balance Recovery and Improves Subsequent High-Intensity Cycling Time to Exhaustion

Bicarbonate ingestion has no ergogenic effect on consecutive all out sprint tests in BMX elite cyclists

Repeated High Intensity Bouts with Long Recovery: Are Bicarbonate or Carbohydrate Supplements an Option?

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