Beetroot for endurance has been studied for nearly two decades. The interest is not based on tradition or anecdote. It is based on a well-understood physiological pathway.
Dietary nitrate, found in beetroot, converts to nitric oxide in the body. Nitric oxide relaxes blood vessels, improves blood flow, and reduces the oxygen cost of exercise.
This article looks at what the research actually shows — and where the evidence is still developing.
Beetroot for Endurance: The Short Answer
The research suggests that dietary nitrate from beetroot can improve endurance performance in some individuals. The effects are most consistent for:
- Time-to-exhaustion during sustained efforts
- Oxygen economy at submaximal intensities
- Performance in recreational and competitive athletes
Individual responses vary. Not everyone responds the same way.
7 Evidence-Based Benefits of Beetroot for Endurance
1. Reduced Oxygen Cost
Bailey et al. (2009) found that dietary nitrate reduced the oxygen cost of submaximal exercise. In practical terms, the same effort required less oxygen.
This is the most consistent finding in the literature. It is the basis for most of the performance benefits.
Source: Bailey et al. (2009) — Journal of Applied Physiology
2. Extended Time-to-Exhaustion
The same study found that time-to-exhaustion increased by up to 16% following nitrate supplementation.
This does not mean every athlete will see 16%. It was the average in that specific study. But the direction is consistent across trials.
3. Improved Muscle Efficiency
Larsen et al. (2007) measured oxygen consumption during cycling and found that nitrate reduced the oxygen cost at a given workload.
This suggests the muscles become more efficient — producing the same power with less oxygen.
Source: Larsen et al. (2007) — Acta Physiologica
4. Better Blood Flow
Nitric oxide relaxes blood vessels. This lowers vascular resistance and improves oxygen delivery to working muscles.
This effect is most relevant during sustained efforts, when oxygen demand is high and blood flow becomes a limiting factor.
5. Lower Heart Rate at the Same Output
Some athletes report a lower heart rate at the same power or pace after supplementing with beetroot.
This is anecdotal and not guaranteed. But it is consistent with the oxygen economy findings.
Arvid Johannesen — Norwegian & Nordic Champion Cyclist
"380 watts at 145 bpm with Stamox. Without: 153 bpm. That's 8 beats lower at the same power.
6. Improved Repeated Sprint Recovery
Clifford et al. (2016) found that beetroot juice accelerated recovery of sprint and jump performance after exercise.
This suggests benefits beyond pure endurance — relevant for team sports and interval-based training.
Source: Clifford et al. (2016) — Nutrients
7. IOC Level A Rating
The International Olympic Committee rates dietary nitrate as one of only five supplements with the highest evidence rating in sport.
This is not a performance benefit per se. But it indicates the quality of the evidence base.
Who Benefits Most?
The research suggests the effect is stronger in:
| Group | Why |
| Recreational athletes | Larger margin for improvement |
| Endurance athletes | The effect targets oxygen economy |
| Masters athletes | Nitric oxide production declines with age |
| Team sport athletes | Repeated sprint recovery |
Elite athletes may see smaller margins, simply because they are already near the ceiling of their physiology.
How to Use Beetroot for Endurance
Daily Training
| Step | Action |
| 1 | Mix 1 tablespoon of beetroot powder into 500ml water |
| 2 | Drink 2–3 hours before training |
| 3 | Avoid mouthwash for 2 hours after |
Race Week
| Day | Dose |
| 5 days pre-race | 2 tablespoons daily |
| Race morning | 2–3 tablespoons, 2–3 hours pre-start |
Why the timing matters: Peak plasma nitrite occurs 2–3 hours after ingestion. The acute effect is most pronounced during this window.
Source: Wylie et al. (2013) — Dose-response study
Common Mistakes
1. Taking It Too Close to Exercise
Nitrate conversion takes time. Taking beetroot 30 minutes before training misses the peak window.
2. Using Mouthwash After Taking It
Mouthwash kills the oral bacteria that convert nitrate to nitrite. This can reduce the effect.
3. Expecting Immediate Results
The acute effect is real but modest. Cumulative adaptations — VO₂ max, mitochondrial efficiency — develop over weeks.
4. Ignoring Individual Variation
Some people respond strongly. Others respond less. Genetics, training status, and baseline nitrate levels all play a role.
Common Questions
How long before exercise should I take beetroot?
Approximately 2–3 hours.
Does beetroot work for everyone?
Individual responses vary. Baseline fitness, diet, and genetics all influence the effect.
How long until I see results?
The acute effect is measurable within hours. Longer-term adaptations develop over 4–12 weeks.
Related Reading
Best time to take beetroot powder — the 2–3 hour window explained.
Beetroot capsules vs powder vs juice — which form to choose.
Beetroot vs nitric oxide supplements — what the research says.
Stamox Oxy-Plus — a beetroot powder used by athletes since 2007.
Stamox Oxy-Plus is a beetroot powder used by athletes since 2007. Measurable results. 12-week guarantee.
