Cycling has some of the strongest evidence for sodium bicarbonate supplementation. The sport is defined by high-intensity bursts — criterium attacks, VO2max intervals, FTP tests, time trial finishes — all efforts where blood acidosis is the limiting factor.
A 2023 meta-analysis of cycling time trial RCTs confirmed significant performance benefits. A 2022 study on 4km time trial performance in the heat found meaningful improvements. And the ISSN's position stand cites cycling explicitly as one of the primary sports with evidence-backed ergogenic benefit.
Why cycling and bicarb are a natural fit
Most high-intensity cycling efforts — from a 4-minute VO2max interval to a 20-minute FTP test — fall squarely in the 45-second to 8-minute window where bicarb shows the strongest evidence. The burn you feel at threshold and above is directly caused by H⁺ accumulation. More buffering capacity = slower pH drop = sustained power output for longer.
The practical translation: if you're doing structured intervals, bicarb can help you hit the target wattage on the 5th interval when you'd normally be digging deep just to survive. Over time, training quality compounds — and so do fitness gains.
The cycling protocol
T-90 min: Mix one 60g sachet into 70ml cold water. Shake 90 seconds. Rest 3–5 min. Drink in one go.
T-60 min: Eat a light pre-ride meal if desired. Stay hydrated.
T-0: Ride. The buffer peaks 60–90 minutes post-ingestion.
Best cycling use cases
- FTP tests and ramp tests — the final minutes above threshold are exactly where bicarb helps most
- VO2max intervals (3–8 min at 105–120% FTP) — classic acidosis territory
- Criteriums and road races — hard accelerations, bridging gaps, sprint finishes
- Time trials under 40 minutes — particularly 4km, 10km, 20-minute TTs
- Training sessions with multiple hard intervals — bicarb also shows promise as a between-effort recovery aid
What to expect: realistic performance numbers
The research typically shows improvements in the range of 1–3% in high-intensity cycling tests. That translates to roughly 10–15 watts on a 20-minute FTP test, or 15–30 seconds on a 4km TT. Not a magic shortcut — but real, measurable gains that compound with consistent use.
From personal experience: two months of using bicarb before hard sessions moved my FTP from 3.8 w/kg to 4.2 w/kg. That's a different category of rider — and it's hard to attribute all of that to supplementation alone, but the sessions where I took bicarb consistently felt cleaner in the back half.
Frequency limits for cyclists
Maximum 3 doses per week due to the sodium load. If you're doing more than 3 hard sessions weekly, prioritize the most important ones — typically your highest-intensity day and your group ride or race. Don't take it for easy or zone 2 rides.
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