The Claim

Sodium bicarbonate supplementation at a dose of 0.2 g/kg body weight, ingested after a carbohydrate-rich meal, improves peak power output by approximately 3.4% and average power output by approximately 2.3% during 20 repeated 6-second maximal sprints in a hot environment (40°C) among recreationally endurance-trained adults, through extracellular buffering of metabolic acidosis.

Source: Effect of sodium bicarbonate on performance and markers of kidney and gastrointestinal injury during repeated sprints in the heat.

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
60score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Cause and effect
1 study reviewed
In plain English

Taking sodium bicarbonate after a carbohydrate-rich meal increases peak power output by 3.4% and average power output by 2.3% during 20 repeated 6-second all-out sprints in 40°C heat in adults with endurance training, due to reduced acid buildup in the blood.

See the scientific wording

Sodium bicarbonate supplementation at a dose of 0.2 g/kg body weight, ingested after a carbohydrate-rich meal, improves peak and average power output by approximately 3.4% and 2.3%, respectively, during 20 repeated 6-second maximal sprints in a hot environment (40°C) among recreationally endurance-trained adults, suggesting it enhances high-intensity exercise performance through extracellular buffering of metabolic acidosis.

Why this might work

When someone takes sodium bicarbonate, it increases the level of bicarbonate in the blood. This bicarbonate catches excess acid produced by muscles during intense sprinting, making it easier for the acid to leave the muscle cells. As a result, the inside of the muscle stays less acidic, which keeps the muscle fibers contracting strongly and efficiently, allowing more power to be generated during repeated sprints.

Verified mechanismbased on 1 study

What the research says

1 study

  1. Study: Effect of sodium bicarbonate on performance and markers of kidney and gastrointestinal injury during repeated sprints in the heat.

    This study found that athletes who took sodium bicarbonate before doing short, intense bike sprints in hot weather were able to generate more power with each sprint, just like the claim said. It didn’t make them hotter or sick, so the boost in power likely comes from reducing muscle acidity.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

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