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Le bicarbonate augmente la force des cuisses de 4%

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Le bicarbonate augmente la force des cuisses de 4%

Messagepar Nutrimuscle-Conseils » 8 Déc 2012 17:05

Sodium bicarbonate supplementation improves hypertrophy-type resistance exercise performance
Benjamin M. Carr Eur J Appl Physiol DOI 10.1007/s00421-012-2484-8

The aim of the present study was to examine
the effects of sodium bicarbonate (NaHCO3) administration
on lower-body, hypertrophy-type resistance exercise
(HRE). Using a double-blind randomized counterbalanced
design, 12 resistance-trained male participants (mean ±
SD; age = 20.3 ± 2 years, mass = 88.3 ± 13.2 kg, height =
1.80 ± 0.07 m) ingested 0.3 g kg-1 of NaHCO3 or placebo
60 min before
initiation of an HRE regimen. The
protocol employed multiple exercises: squat, leg press, and
knee extension, utilizing four sets each, with 10–12 repetition-
maximum loads and short rest periods between sets.

Exercise performance was determined by total repetitions
generated during each exercise, total accumulated repetitions,
and a performance test involving a fifth set of knee
extensions to failure. Arterialized capillary blood was
collected via fingertip puncture at four time points and
analyzed for pH, [HCO3
-], base excess (BE), and lactate
[Lac-]. NaHCO3 supplementation induced a significant
alkaline state
(pH: NaHCO3: 7.49 ± 0.02, placebo:
7.42 ± 0.02, P\0.05; [HCO3
-]: NaHCO3: 31.50 ± 2.59,
placebo: 25.38 ± 1.78 mEq L-1, P\0.05; BE: NaHCO3:
7.92 ± 2.57, placebo: 1.08 ± 2.11 mEq L-1, P\0.05).
NaHCO3 administration resulted in significantly more total
repetitions than placebo (NaHCO3: 139.8 ± 13.2, placebo:
134.4 ± 13.5)
, as well as significantly greater blood [Lac-]
after the exercise protocol (NaHCO3: 17.92 ± 2.08, placebo:
15.55 ± 2.50 mM, P\0.05). These findings demonstrate
ergogenic efficacy for NaHCO3 during HRE and
warrant further investigation into chronic training
applications.
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