How Pre-Training Dietary Nitrate from Celery and Romaine Can Improve Blood Flow, Economy, and Repeat-Set Performance
Dietary nitrate can improve exercise efficiency and repeat efforts when timed and dosed correctly. Here’s how to use celery and romaine like a performance tool.
If you have ever felt your legs turn heavy halfway through intervals, or watched your last set drop off faster than it should, dietary nitrate is worth your attention. In controlled studies, nitrate-rich foods and beetroot juice have improved oxygen cost, blood pressure, and repeated-sprint performance by a meaningful margin in some athletes (Lansley et al., 2011; Wylie et al., 2013).
The interesting part: you do not need beetroot to get the benefit. Celery and romaine lettuce can also contribute nitrate, and when you use them with the right timing, you can support blood flow and movement economy without relying on supplements every session.
What dietary nitrate actually does Dietary nitrate is converted in the body to nitrite and then to nitric oxide, especially under lower-oxygen conditions during hard exercise. Nitric oxide helps regulate vascular tone, so blood vessels can dilate and deliver oxygen more efficiently to working muscle (Lundberg et al., 2008).
That matters for athletes because better nitric oxide availability can reduce the oxygen cost of a given workload. In practical terms, the same pace or bar speed may require less internal effort. That is why researchers have repeatedly observed improved exercise economy in cycling and running after nitrate supplementation (Lansley et al., 2011; Wylie et al., 2013).
For resistance training, the effect is less dramatic than in endurance work, but it can still matter. Better perfusion and a slightly improved energy cost can help on repeated sets, short rest intervals, and hybrid sessions where you need to maintain output across multiple bouts.
Why celery and romaine can work Beetroot gets the headlines because it is easier to dose consistently, but leafy greens also contain nitrate. Celery, romaine lettuce, arugula, spinach, and beetroot are all useful sources. The catch is variability: nitrate content changes with growing conditions, storage, and preparation. That means whole foods are performance tools, but they are not as standardized as a laboratory dose.
Still, celery and romaine are practical because they are easy to eat in the 2-4 hours before training, they digest well, and they pair with real meals. A large romaine salad plus celery sticks can meaningfully contribute nitrate intake, especially if you are also getting other nitrate-rich vegetables across the day.
Do not sabotage the pathway with antiseptic mouthwash or aggressive gum use before training. The oral bacteria that reduce nitrate to nitrite are part of the conversion process; antiseptic mouthwash can blunt nitric oxide generation and reduce the effect (Kapil et al., 2013).
What the evidence says about performance The best-supported outcome is improved exercise economy. In trained runners and cyclists, nitrate has lowered the oxygen cost of submaximal work, which can translate into better endurance and less perceived effort at a given pace (Lansley et al., 2011).
Repeated high-intensity efforts also appear responsive. Studies have found better performance in repeated sprint or intermittent exercise after nitrate intake, especially when the task is demanding and recovery is incomplete (Wylie et al., 2013). That makes the strategy relevant for team sports, hard interval work, and mixed-modality training.
Strength and hypertrophy data are less consistent. Nitrate is not a replacement for carbohydrate, creatine, or adequate training volume. But if your session depends on maintaining output over multiple hard sets, improved blood flow and a small efficiency boost may help preserve rep quality.
The effect tends to be more noticeable in less-trained athletes, in endurance work, and in sessions where the limiting factor is fatigue management rather than absolute strength. Elite athletes may still benefit, but the signal is smaller and more individual.
How much nitrate do you need The commonly studied ergogenic range is about 5-9 mmol of nitrate, taken 2-3 hours before exercise. That amount is often achieved with beetroot juice, but with vegetables you need to think in food portions rather than a precise lab number.
Because nitrate content varies, a practical food-based target is a large serving of nitrate-rich vegetables 2-4 hours pre-training, with another nitrate-rich serving earlier in the day if you want to raise total intake. For example:
- 2-3 cups romaine lettuce in a salad
- 2-4 celery stalks alongside a meal or snack
- A mix of arugula, spinach, romaine, and celery in a meal window before training
If you want more reliable dosing, use food consistently and track what gives you the best perceived effect. If you want precise performance dosing, standardized beetroot products are easier. But for everyday athletes, celery and romaine are a low-friction option that can still move the needle.
When to take it Timing matters. The conversion from nitrate to nitrite and then nitric oxide takes time, so the best window is usually 2-3 hours before training or competition (Lansley et al., 2011). That is the sweet spot for most athletes.
A good default looks like this:
- 2-3 hours pre-training: nitrate-rich meal or salad
- 30-60 minutes pre-training: carbohydrate and fluids if needed, but avoid antiseptic mouthwash
- During training: normal fueling based on session length and intensity
For longer sessions, you can layer nitrate intake earlier in the day rather than trying to cram everything into one pre-workout meal. The goal is to start the session with elevated nitrate availability, not to use it like a stim pre-workout.
Who is most likely to benefit You are most likely to notice the effect if your training includes one of these:
- Intervals with short rest
- Repeated sprints
- Tempo runs
- High-volume hypertrophy blocks
- Hybrid sessions where endurance and strength are both taxed
You may benefit less if the session is a true one-rep-max test or if your training already has long rest intervals and very low metabolic stress. Nitrate is a fatigue-management tool, not a maximal-force booster.
It is also useful when you are under-recovered but still need to perform. Better blood flow and lower oxygen cost do not erase poor sleep or low glycogen, but they can slightly improve how a session feels and how much quality you can preserve.
Practical food examples Here are simple pre-training options that fit real life:
Option 1: Salads and sides
- Large romaine-based salad with olive oil, vinegar, and salt
- 2-4 celery stalks with hummus or alongside lunch
- Chicken, rice, or potatoes to cover training fuel
- Eat 2-3 hours before lifting or intervals
Option 2: Hybrid-day meal
- Romaine wrap with lean protein
- Celery sticks plus fruit
- Rice or bagel for carbohydrate support
- Take 2-4 hours pre-session
Option 3: Double-dose day
- Nitrate-rich breakfast: spinach and romaine omelet or salad
- Pre-training meal: celery and romaine salad with protein and carbs
- Useful for long endurance or two-a-day training
If you are a runner, keep fiber manageable. Too much roughage right before impact work can backfire in the gut. If you are a lifter, the tolerance window is usually broader, but a massive salad right before squats can still be a bad idea.
Safety and limitations Dietary nitrate from vegetables is generally safe for healthy athletes. The main caution is individual tolerance. Large servings of raw greens can cause GI distress in some people, especially close to high-intensity training.
If you have low blood pressure, take antihypertensive medication, or have a medical condition affecting vascular regulation, talk with a clinician before using nitrate strategically. The blood pressure effect is real, and that can be a benefit or a problem depending on the person.
Also remember that food-based nitrate is not standardized. One head of romaine is not identical to another, and celery nitrate content varies. That is why the best approach is to treat this as a repeatable habit, not a precision lab protocol.
How to apply this Use this weekly plan for two weeks and judge the response by output, perceived exertion, and repeat-set quality:
Monday: lower-body or interval day
- 2-3 hours pre-session: large romaine salad plus 3-4 celery stalks
- Add 30-60 g carbohydrate if the session is hard
- Track bar speed, pace, or RPE on the last two work sets
Wednesday: mixed or upper-body day
- 2-3 hours pre-session: romaine wrap and celery side
- Compare how you feel on short-rest accessories or intervals
Friday: hardest session of the week
- Use your most nitrate-rich meal of the week
- Keep mouthwash out of the pre-training window
- Log whether you preserve rep quality better than usual
Checklist for each session
- Eat nitrate-rich vegetables 2-3 hours before
- Pair with enough carbohydrate to support the workout
- Avoid antiseptic mouthwash for several hours before training
- Keep the meal consistent so you can judge whether it works
- Use it on sessions where fatigue resistance matters most
If performance improves, keep it in your rotation for interval days, hard conditioning, and high-volume lifting. If you do not notice a difference, the issue is usually dose, timing, or session type, not the concept itself.
Used properly, celery and romaine are not just “healthy foods.” They are a cheap, low-risk way to bias blood flow, improve exercise economy, and protect repeat-set output when training gets hard.