CGX vs Norwegian 4x4 Protocol

Build who you want to be with CGX by Caroline Girvan. CGX is a premium strength and fitness app built around exclusive, structured training programs. Every program is progressive and designed to help you build strength, improve fitness, and train with consistency over time. Inside CGX you’ll find: • Exclusive workout programs for all levels, from complete beginner to advanced • Hundreds of on-demand strength, cardio, and conditioning workouts • Clear, coached training with a strong focus on proper form and technique • Short, effective workouts that fit real life without compromising results CGX goes beyond the workout itself, supporting your training journey in a practical and sustainable way: • Instructional videos to help you train safely and confidently • Simple progress tracking and quick fitness tests • Nutritious, budget-friendly meal ideas • Evidence-based articles from Caroline and trusted industry experts Train in a way that suits your routine: • Schedule workouts and programs in your CGX calendar • Download workouts for offline training • Cast workouts to your TV with AirPlay or Chromecast • Choose Caroline’s music, no music, or your own via Apple Music or Spotify • Sync your training with Apple Health • Save favourites and track progress workout by workout • Share encouragement and tips through supportive comments under each workout • Train anywhere using the CGX website on your laptop or computer Caroline Girvan is a certified personal trainer, MNU certified nutritionist, and pre- and postnatal specialist with over a decade of experience and a global following of millions. CGX brings her proven training approach into a focused, premium platform designed for long-term progress. Build who you want to be. Cx

Norwegian 4x4 HIIT Timer — Interval Training & VO2 Max BOOST VO2 MAX WITH NORWEGIAN 4X4 PROTOCOL WORKOUTS Train smarter with the Norwegian 4x4 protocol, one of the most studied HIIT methods for improving cardiovascular performance and endurance. A precise, distraction-free timer guides every interval so you can focus on the effort. KEY FEATURES: - Norwegian 4x4 Timer - Precision 4min work / 3min rest cycles - Heart Rate Training - Track 90-95% max HR zones - VO2 Max Improvement - Scientifically proven results - HIIT Interval Timer - Multiple workout protocols - Progress Tracking - Monitor your fitness transformation - Universal Training - Running, cycling, rowing, any cardio, you name it - Offline Ready - No internet required during workouts - Haptics Feedback and Vibrations - Countdown before the start - Customizable Warmup session length - Customizable Cooldown session length WHAT IS NORWEGIAN 4 BY 4 TRAINING? The Norwegian 4x4 protocol is a revolutionary HIIT method featuring: - 4 intervals of 4 minutes at 90-95% max heart rate - 3 minutes active recovery between intervals - Proven results: Increase VO2 max by up to 10% in 8 weeks - Elite approved: Used by professional athletes worldwide WHY CHOOSE NORWEGIAN 4X4 INTERVAL TRAINING? - PROVEN RESULTS: Sports science research shows significant cardiovascular improvements - BEGINNER FRIENDLY: Complete guide for Norwegian 4x4 workout beginners - CUSTOMIZABLE: Adapt the Norwegian 4 x 4 protocol to your fitness level - COMPREHENSIVE: Includes warm-up, cool-down, and recovery protocols - VALIDATED: Mention in Tim Ferriss' Blog PERFECT FOR: - Athletes seeking performance gains with Norwegian 4x4 workouts - Fitness enthusiasts wanting efficient HIIT interval training - Anyone improving cardiovascular health through proven protocols - Runners, cyclists, rowers using Norwegian 4x4 interval training HOW OFTEN NORWEGIAN 4X4? - Our app includes guidance on optimal training frequency and recovery for maximum VO2 max gains. START YOUR NORWEGIAN 4X4 TRANSFORMATION Join thousands who have revolutionised their fitness with the Norwegian 4x4 protocol training. Download the ultimate Norwegian 4x4 workout app now! Download today and start training with the Norwegian 4x4.