Sodium Bicarbonate (Baking Soda)

The Problem: Acidosis During High-Intensity Exercise

During intense exercise, your muscles produce hydrogen ions (H+) as a byproduct of anaerobic glycolysis. This accumulation of H+ causes: - Decreased muscle pH (acidosis) - Impaired enzyme function - Reduced calcium release for muscle contraction - The "burn" and fatigue that limits performance

How Sodium Bicarbonate Works:

Bicarbonate (HCO3-) is your body's primary extracellular buffer. Supplementing increases blood bicarbonate concentration by ~5-6 mmol/L, creating a state of metabolic alkalosis.

Mechanism of Action:

1. Increased blood HCO3- creates a larger H+ concentration gradient
2. H+ and lactate are co-transported out of muscle cells faster (via MCT1/MCT4)
3. Intramuscular pH maintained closer to optimal
4. Glycolytic enzyme function preserved longer
5. Fatigue delayed, performance improved

Evidence Summary (ISSN Position Stand):

• Ergogenic for exercise lasting 30 sec to 12 min
• Improves muscular endurance (more reps at given load)
• Enhances peak and mean anaerobic power
• Benefits single and repeated bout exercise
• Works in both men and women

Key Research:

• ISSN Position Stand (2021): Official position supporting use for high-intensity exercise
• Umbrella Review (2021): 8 meta-analyses confirm ergogenic effects
• Carr et al. (2011): Meta-analysis showing 1.7% improvement in performance

What It Doesn't Help:

• Very short efforts (<30 sec) - not enough acid accumulation
• Very long efforts (>12 min) - limited by other factors
• Low-intensity aerobic exercise - no significant acidosis
• Strength/power (1-5 rep max) - not limited by pH

Acute Single-Dose Protocol (Most Common):

Example for 70kg Athlete:

• Dose: 70 × 0.3 = 21g sodium bicarbonate
• Timing: 90-120 min pre-competition
• ~5-6 teaspoons or ~25 capsules (size 00)

Multi-Day Loading Protocol (Better GI Tolerance):

Example 3-Day Load for 70kg Athlete:

• Daily: 70 × 0.4 = 28g split into 3 doses (~9g each)
• Take each dose with meals
• Competition day: optional 0.1-0.15 g/kg top-up

Minimizing GI Distress:

1. Enteric-coated capsules - Best option, bypasses stomach
2. Take with food - Slows absorption, reduces symptoms
3. Multi-day loading - Avoids large single dose
4. Longer pre-exercise window - 180 min vs 60 min
5. Individual testing - Response varies hugely

Form Comparison:

When to Use:

• 400m - 1500m running
• 500m - 2000m rowing
• 100m - 400m swimming
• Cycling time trials (1-4 km)
• Combat sports
• CrossFit-style workouts
• High-rep resistance training
• Any maximal effort 30 sec - 12 min

Critical: Test in Training First

Never use a new protocol on competition day. Individual GI response varies dramatically.

Common Side Effects:

• Bloating (very common)
• Nausea
• Stomach cramps
• Diarrhea
• Vomiting (less common)
• Flatulence

GI Distress Incidence:

• With plain solution: ~50-70% experience symptoms
• With food/capsules: ~20-40% experience symptoms
• With enteric coating: ~10-20% experience symptoms

Serious Concerns:

• Sodium load: A 21g dose contains ~6,200mg sodium (nearly 3x daily recommended limit)
• Cardiovascular risk: Regular high-sodium intake linked to hypertension
• Electrolyte imbalance: Can occur with repeated use
• Alkalosis symptoms: Rare but possible (tingling, muscle cramps)

Contraindications:

• Hypertension (high blood pressure)
• Heart disease
• Kidney disease
• Salt-restricted diet
• Pregnancy
• Children (no established safety)

Drug Interactions:

• May affect absorption of other medications
• Can interact with diuretics
• Consult doctor if on any medications

Risk Mitigation:

• Don't use daily/chronically
• Save for key competitions
• Monitor blood pressure if using regularly
• Stay well hydrated
• Test tolerance before competition

Risk Level: Low-Moderate (if used occasionally for competition)

Ideal Candidates:

• Middle-distance runners (400m-1500m)
• Swimmers (100m-400m events)
• Rowers (500m-2000m)
• Track cyclists (individual/team pursuit)
• Combat sport athletes (wrestling, judo, boxing)
• CrossFit competitors (high-intensity metcons)

May Benefit:

• Team sport athletes (repeated sprints)
• High-rep resistance training
• HIIT enthusiasts
• Anyone in lactate-limited events

Probably Won't Help:

• Sprinters (<30 sec events)
• Marathon/ultra runners
• Powerlifters/strength athletes
• Casual exercisers

Should Avoid:

• Those with hypertension
• Heart or kidney disease
• Severe GI sensitivity
• Anyone on salt-restricted diet
• Those who haven't tested tolerance

What to Track:

• GI symptoms (type, severity, timing)
• Performance metrics for your event
• Optimal timing for your body
• Form that works best (capsules, solution, etc.)

Performance Metrics:

GI Symptom Log:

Testing Protocol:

1. First test: 0.2 g/kg, 120 min before, with food
2. If tolerated: Try 0.25 g/kg
3. If tolerated: Try 0.3 g/kg
4. If GI issues: Try enteric capsules or multi-day loading
5. Find your personal optimal protocol

Signs It's Working:

• Ability to maintain higher intensity longer
• Less severe "burn" at end of efforts
• Faster recovery between intervals
• Performance improvement of 1-3%

Food-Grade Baking Soda (Budget):

• Arm & Hammer Pure Baking Soda - Cheapest option, proven effective
• Bob's Red Mill Baking Soda - Aluminum-free option

Pre-Made Sports Supplements:

• Nduranz Bicarb - Enteric-coated capsules, designed for athletes
• Maurten Bicarb System - Premium, used by elite athletes
• Beta Alanine + Bicarb combos - Stacked formulas

Empty Capsules (DIY):

• Size 00 Gelatin Capsules - ~500mg per capsule
• Enteric-Coated Capsules - For sensitive stomachs
• Capsule filling machine - Makes DIY faster

What to Look For:

• Food-grade/USP grade baking soda
• Pure sodium bicarbonate (no additives)
• For capsules: appropriate size for your dose

What to Avoid:

• Industrial/cleaning-grade baking soda
• Products with unnecessary additives
• Extremely cheap overseas supplements

Raw Baking Soda:

• Arm & Hammer: ~$3-5 for 1 lb (454g)
• Cost per dose (21g): ~$0.15
• Monthly (8 doses): ~$1.20

Capsules (Empty):

• Size 00 capsules: ~$10 for 500
• Cost per dose: ~$0.50 (including baking soda)

Pre-Made Supplements:

Enteric-Coated (Premium):

• Specialty products: $30-50 for 60-120 capsules
• Cost per dose: $1-2

Cost-Benefit:

Sodium bicarbonate is one of the cheapest ergogenic aids. Even premium enteric-coated options cost less than a cup of coffee per use.

Best Value:

• DIY capsules with food-grade baking soda
• Or plain baking soda mixed into sports drink with food

Researchers:

• Bryan Saunders, PhD - Lead author on enteric-coated bicarbonate research
• Lars McNaughton, PhD - Extensive bicarbonate research, position stand co-author
• Craig Sale, PhD - Beta-alanine and bicarbonate research

Sports Nutrition Bodies:

• ISSN - Published 2021 position stand supporting use
• IOC - Recognizes as evidence-based supplement
• ACSM - Includes in sports nutrition guidance

Practical Advocates:

• Alex Hutchinson - Science writer, covers bicarbonate in "Endure"
• TrainingPeaks - Publishes practical protocols

Elite Use:

• Widely used in rowing, cycling, swimming at elite level
• Track & field middle-distance runners
• Olympic-level athletes (legal supplement)
• Professional cycling teams

Why It's Trusted:

• ISSN position stand (highest level of endorsement)
• Decades of research
• Multiple meta-analyses
• WADA permitted (not banned)
• Used at Olympics

Common Experiences:

• "Felt like I could push harder in the last 200m"
• "Intervals felt more sustainable"
• "GI issues until I found the right protocol"
• "Multi-day loading changed everything for my stomach"
• "1-2% improvement in my 2k row time"

Common Complaints:

• "GI distress ruined my race" (protocol issue)
• "Hard to take so many capsules"
• "Didn't notice anything" (wrong event type)

Reddit/Forum Consensus:

• r/AdvancedRunning: Well-known, widely used for 800m-1500m
• r/Rowing: Standard for 2k tests
• r/Velo: Used for time trials and crits

Classic Stacking:

• Beta-Alanine + Sodium Bicarbonate - Different buffering mechanisms (intracellular + extracellular). Additive effects in some studies.
• Caffeine - Can combine, but may worsen GI issues
• Creatine - Different mechanisms, can stack
• Carbohydrates - Take bicarb with carbs to reduce GI distress

Buffering Stack:

• Sodium bicarbonate (0.3 g/kg pre-event)
• Beta-alanine (3-6 g/day ongoing loading)
• Combined may provide greater benefit than either alone

Race Day Stack:

• Caffeine (3-6 mg/kg) - 60 min pre
• Sodium bicarbonate (0.3 g/kg with food) - 90-120 min pre
• Carbohydrate loading - days before

What to Avoid:

• Don't combine with excessive caffeine (GI stress)
• Avoid other GI-irritating supplements same day
• Don't use with antacids (already alkaline)

Timing Considerations: