Why Are Fresh Juices Valuable for Athletes?
Freshly squeezed juices are one of the most effective ways to quickly replenish the body's reserves of vitamins, minerals and antioxidants. Unlike store-bought juices with added sugar, fresh juices preserve enzymes, phytochemicals and all biologically active substances. This is especially important for athletes because intense training increases oxidative stress and the need for micronutrients.
📊 Best Juices for Athletes — Comparison
| Juice Type | Main Benefit for Sport | Calories (250 ml) | Best time | Recommendation |
|---|---|---|---|---|
| Beetroot juice | NO production, endurance | 110 | 2–3 h before training | Highly recommended |
| Cherry juice | Recovery, sleep quality | 130 | After training / in the evening | Highly recommended |
| Watermelon juice | Source of citrulline, hydration | 80 | Pre-Workout | Recommended |
| Orange juice | Vitamin C, quick energy | 110 | Morning / before training | Good |
| Celery juice | Electrolytes, anti-inflammatory | 40 | Morning (empty stomach) | Good |
| Carrot juice | Vitamin A, beta-carotene | 90 | Any time | Good |
🔴 Beetroot Juice — Endurance Elixir
Beetroot juice is one of the most scientifically studied sports nutrition products. The nitrates in it are converted in the body into nitric oxide (NO), which dilates blood vessels, improves blood circulation and oxygen supply to muscles.
🏃 Endurance Improvement
A meta-analysis (23 studies) showed that beetroot juice improves endurance performance. Time to exhaustion increases by 15–25%. The effect is strongest in recreational athletes.
⚡ Faster Recovery
Nitrates reduce muscle soreness (DOMS) and creatine kinase levels after intense training. 250 ml of beetroot juice after a hard workout accelerates recovery by ~20%.
🧠 Mental Focus
Improved blood circulation in the brain improves reaction time and decision-making — important in sports that require quick decisions (martial arts, team sports).
Dosage:
- Before training: 250–500 ml of beetroot juice 2–3 h before (allows nitrates to reach peak levels in the blood)
- Concentrate: 70 ml of beetroot juice concentrate (Beet-It shots) — a more convenient alternative
- Note: Urine may turn red — this is harmless (beeturia)
🍒 Cherry Juice — Recovery Aid
Sour cherries (Prunus cerasus) juice is one of the best natural post-workout recovery aids. The anthocyanins in it have a strong anti-inflammatory effect.
- Reducing muscle soreness: 2×250 ml of cherry juice per day (before and after a marathon) reduced muscle soreness by 34% and accelerated strength recovery (2010 study)
- Sleep quality: Cherries naturally contain melatonin. 250 ml of juice in the evening increases melatonin levels and improves sleep duration by ~84 minutes
- Inflammation markers: CRP and IL-6 markers are significantly lower in the group of athletes consuming cherry juice
- Protocol: 250 ml twice a day — morning and evening. Start consuming 3–5 days before competitions
🍉 Watermelon Juice — Natural Pre-Workout
Watermelon is the richest natural source of L-citrulline — an amino acid that is converted in the body into L-arginine and ultimately nitric oxide. 250 ml of watermelon juice provides ~300–500 mg of citrulline.
- Natural “pump”: Citrulline improves blood circulation and the muscle “pump” effect during workouts
- Hydration: 92% water + electrolytes — an ideal hydration aid on hot days
- Less soreness: Citrulline reduces muscle soreness after workouts (compared with placebo)
- Pre-workout recipe: 300 ml watermelon + 1/2 lemon juice + a pinch of salt
🥬 Green Juices for Athletes
Green juices (spinach, kale, celery, parsley, cucumbers) are an irreplaceable way to increase vegetable consumption and get a concentrated dose of chlorophyll, vitamins and minerals without a large amount of sugar.
🥬 Spinach-Based
Nitrates in spinach work similarly to those in beetroot — they improve circulation. Add an apple for sweetness and ginger for its anti-inflammatory effect.
🌿 Parsley Boost
Parsley has the most vitamin C of all greens (133 mg/100 g). It adds a refreshing taste and strengthens immunity.
🥒 Celery Detox
Celery juice contains natural electrolytes (sodium, potassium) and anti-inflammatory compounds. It is best drunk in the morning on an empty stomach.
🛒 Recommended Products
❓ Frequently Asked Questions
Do juices replace all fruits and vegetables?
No. Juices lack fiber, which slows sugar absorption and feeds gut bacteria. Juice should supplement, not replace, whole fruits and vegetables. Optimal ratio: 1 glass of juice + 3–4 servings of whole fruits/vegetables per day.
When is it best to drink juice — before or after a workout?
It depends on the type of juice. Beetroot and watermelon — 2–3 hours before a workout. Cherry — after a workout or in the evening. Orange — in the morning before a workout for energy. Green juices — at any time, but not immediately before an intense workout (due to fiber).
Are juices suitable for weight loss?
Juices should be consumed with caution when losing weight — although they are high in vitamins, it is easy to exceed calories from liquid carbohydrates. One glass (250 ml) of fruit juice contains ~100–130 kcal. Choose more vegetable-based juices (green, celery); they have fewer calories.
Can juices be stored in advance?
Freshly squeezed juice is best drunk within 15–30 minutes. When stored in the refrigerator, oxidation destroys some vitamins (especially C) and enzymes. If storage is necessary, use an airtight glass container and drink it within 24 hours.