Everything About Norwegian 4x4 Training and App

Discover more about high-intensity interval training and endurance sports with our curated articles.

VO₂ Max, Longevity & Training Guides

New guides on VO₂ max, Zone 2, wearables, HYROX, GLP-1 muscle preservation, and practical 4x4 training.

Japanese Walking vs Norwegian 4x4

IWT vs 4x4: intensity, time, and a 4-week walking-to-intervals plan.

4 min read · Updated July 7, 2027

Norwegian 4x4 vs Zone 2 for Longevity

Polarized training—Zone 2 volume plus 4x4 HIIT for longevity.

4 min read · Updated July 7, 2027

What Is a Good VO2 Max for My Age?

Reference chart by age and sex, plus how to interpret your number.

4 min read · Updated July 7, 2027

Is Apple Watch / Garmin VO2 Max Accurate?

Wearable VO₂ estimates vs lab tests and 4x4 field tracking.

4 min read · Updated July 7, 2027

Prevent Muscle Loss on Ozempic / GLP-1

Resistance + 4x4 + protein to preserve lean mass on GLP-1s.

4 min read · Updated July 7, 2027

HYROX Training Plan for Beginners

8-week HYROX block with 4x4 as your aerobic engine.

4 min read · Updated July 7, 2027

Norwegian 4x4 Treadmill Settings

Speed and incline by fitness level—indoor 4x4 made simple.

4 min read · Updated July 7, 2027

How Long Does It Take to Increase VO2 Max?

4–6 weeks for first gains; 8–12 weeks for meaningful VO₂ shifts.

4 min read · Updated July 7, 2027

Is HIIT Safe After 50?

Medical clearance, modified progressions, and recovery rules.

4 min read · Updated July 7, 2027

Improve HRV with Interval Training

Polarized weeks, hard/easy balance, and what to skip on low HRV days.

4 min read · Updated July 7, 2027

Discover More Content

Browse our articles to learn more about the Norwegian 4x4 Protocol in action!

What Is Visceral Fat? Risks, Causes, and Why It Matters

Understand belly fat vs subcutaneous fat and why visceral fat is a health risk.

4 min read · Updated July 7, 2027

How to Reduce Visceral Fat with HIIT and the Norwegian 4x4

Step-by-step: use structured 4x4 intervals, heart-rate zones, and weekly frequency to support a leaner midsection.

5 min read · Updated July 7, 2027

Norwegian 4x4 for Fat Loss: Burn More in 16 Minutes

EPOC afterburn, ~16 minutes of hard work, and how the app keeps intensity honest.

4 min read · Updated July 7, 2027

HIIT vs Steady-State Cardio for Fat Loss

When to pick intervals vs long slow cardio—and why Norwegian 4x4 is a practical sweet spot.

3 min read · Updated July 7, 2027

AG1 Failed: A Chance for Bryan Johnson?

Overpriced, underperforming AG1 — learn Bryan Johnson's view.

5 min read · Updated July 7, 2027

The Dark Origins of Athletic Greens (AG1)

Uncover the truth about AG1 green powder.

5 min read · Updated July 7, 2027

Recovery & Regeneration: Fitness Essentials

Why recovery is essential for optimal performance.

5 min read · Updated July 7, 2027

Personalized Fitness: Tailoring Your Path to Success

Personalized coaching for individual fitness goals.

5 min read · Updated July 7, 2027

Mindful Movement: Fitness and Mental Wellness

Integrate physical fitness with mental wellness.

5 min read · Updated July 7, 2027

Virtual Fitness Experiences In 2025

Virtual fitness revolution and future trends.

5 min read · Updated July 7, 2027

The Role of Nutrition in HIIT: Fueling Your Workouts 101

Optimize HIIT performance with proper nutrition.

5 min read · Updated July 7, 2027

Building Muscle with Interval Training

Build muscle effectively with HIIT.

5 min read · Updated July 7, 2027

Michelle Obama's Fitness Regiment & HIIT

Michelle Obama's dedication to health and fitness.

5 min read · Updated July 7, 2027

Get Fit for Summer with Norwegian 4x4

Top HIIT workouts for fast summer fitness results.

5 min read · Updated July 7, 2027

Key Tips for Effective Weight Management

Effective strategies for managing weight.

5 min read · Updated July 7, 2027

The Most Popular Videos on the Norwegian Method in 2024

Popular Norwegian Method videos from elite experts.

5 min read · Updated July 7, 2027

Why 2025 is the Year of Fitness Apps

The rise of mobile fitness apps in 2025.

5 min read · Updated July 7, 2027

The Ultimate Guide to Norwegian 4x4 Workouts

Everything you need to know about Norwegian 4x4 Workouts.

10 min read · Updated July 7, 2027

Dr. Rhonda Patrick on Norwegian 4x4 Protocol

Dr. Patrick primarily focuses on methods and possibilities for slowing down aging or preventing heart diseases.

8 min read · Updated July 7, 2027

HIIT for Marathon Runners: Can It Improve Race Time?

Integrating High-Intensity Interval Training into Marathon Training.

5 min read · Updated July 7, 2027

What is Norwegian 4x4 Rowing?

An in-depth look into the rowing aspect of the Norwegian 4x4 Protocol.

8 min read · Updated July 7, 2027

How Often to Perform Norwegian 4x4 Training?

How many 4x4 sessions per week for recovery, progress, and cardiovascular gains.

5 min read · Updated July 7, 2027

Top 10 HIIT Exercises to Boost Your Fitness

Explore the most effective HIIT exercises to elevate your fitness.

5 min read · Updated July 7, 2027

Apple iOS Mobile App Review

An in-depth review of the Norwegian 4x4 Protocol Apple iOS Mobile App.

5 min read · Updated July 7, 2027

Unlocking the Power of VO₂ Max with the Norwegian 4x4

Learn about VO₂ Max and how to improve it using the Norwegian 4x4 Protocol, a high-intensity interval training method.

8 min read · Updated July 7, 2027

The Power of Interval Training: Maximize Your Fitness

Discover how interval training can enhance your cardiovascular fitness and endurance.

5 min read · Updated July 7, 2027

Heart Health and Heart Rate Optimization

Maximize Cardiovascular Fitness with the Norwegian 4x4 Protocol.

5 min read · Updated July 7, 2027

Norwegian 4x4 vs. Tabata

Compare the Norwegian 4x4 and Tabata HIIT protocols. Discover the benefits, intensity levels, and target audiences for each to find the best HIIT workout for your fitness goals.

6 min read · Updated July 7, 2027

Beginner's Guide to the Norwegian 4x4 Workout

Learn about the Norwegian 4x4 workout, its structure, benefits, and how beginners can start with this highly effective HIIT protocol. Improve your cardiovascular health and endurance.

10 min read · Updated July 7, 2027

Making Norwegian 4x4 an Atomic Habit: Turn HIIT into a Lifelong Ritual

Turn your Norwegian 4x4 workout into a lifelong habit with insights from Atomic Habits. Discover how to make fitness part of your daily routine.

6 min read · Updated July 7, 2027

The Benefits of the Norwegian 4x4 Protocol

Uncover the Secrets of Improved Endurance, Enhanced Cardiovascular Health, and Boosted Fitness

8 min read · Updated July 7, 2027

Trends in HIIT, Interval Training, and the Norwegian 4x4 Protocol

Discover how fitness trends for 2026, including Norwegian 4x4 and tech advancements, are shaping training strategies for endurance and health.

5 min read · Updated July 7, 2027

Reflecting on 2024: The Year of the Norwegian 4x4 Protocol

Explore how leading experts like Dr. Rhonda Patrick and Dr. Andrew Huberman celebrated the Norwegian 4x4 Protocol in 2024, highlighting its transformative impact on cardiovascular health and fitness strategies.

5 min read · Updated July 7, 2027

Natural Weight Loss Strategies: The Norwegian 4x4 Protocol vs. Ozempic

Compare the natural benefits of the Norwegian 4x4 Protocol with the quick-fix approach of Ozempic, and discover which strategy aligns with your health and fitness goals for sustainable results.

6 min read · Updated July 7, 2027

Top 5 Supplements You Actually Need (Backed by Science)

Discover the 5 essential supplements backed by Rhonda Patrick, PhD. Learn about Vitamin D, Omega-3, Multivitamins, Magnesium, and Sulforaphane for optimal health and performance.

6 min read · Updated July 7, 2027

Norwegian 4x4 Researchers: Jan Helgerud, Jan Hoff & Ulrik Wisløff

Meet the NTNU researchers behind the Norwegian 4x4 protocol. Jan Helgerud, Jan Hoff, and Ulrik Wisløff pioneered the science of 4x4 HIIT. Learn about Myworkout and the research that made it famous.

8 min read · Updated July 7, 2027

Peter Attia on Norwegian 4x4: VO2 Max, Longevity, and a Reality Check

Peter Attia champions the Norwegian 4x4 for VO2 max and longevity. Here's what he gets right—and a brief reality check on celebrity fitness advice.

6 min read · Updated July 7, 2027

Norwegian 4x4 on Instagram, TikTok & On Running

Discover Norwegian 4x4 guides from On Running, Shred Athletics, Mkfitpt, and other fitness influencers. Research-backed breakdowns on Instagram and TikTok.

5 min read · Updated July 7, 2027

Best HIIT Norwegian 4x4 Workouts and News 2026

Best HIIT Norwegian 4x4 workouts and news for 2026. Discover top video guides, reels, and the latest updates on the research-backed 4x4 interval protocol.

3 min read · Updated July 7, 2027

Calculate Your Heart Rate Zones

Estimate your HRmax for effective 90–95% interval training and 60–70% recovery zones.

Calculate Your HRmax

How the App Works

Step-by-step guide to your first 38-minute 4x4 workout with guided timers and audio cues.

See How It Works

Ready to Transform Your Fitness?

Join thousands of users who improved their cardiovascular health. Download the official app and start your first 38-minute workout today.

Download on the App Store Get it on Google Play

38-minute structured workouts • iOS & Android • Rated 4.8/5

Learn How the Norwegian 4x4 App Works

Learn how to make the most out of your workouts with our comprehensive guide. Find out how the app can help you achieve your fitness goals with ease.

Learn How App Works

Calculate Your Target Heart Rate (HRmax)

Estimate your maximum heart rate based on age, weight and height. Knowing your HRmax is essential for effective training and cardiovascular health.

Calculate Your HRmax

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