4x4 Treadmill vs RunSharp

4×4 Treadmill is your personal interval training coach. Built around the scientifically proven Norwegian 4×4 method, it guides you through high-intensity treadmill workouts with real-time heart rate monitoring and live coaching. WHAT IS 4×4 TRAINING? Four intervals of 4 minutes at high intensity, separated by active recovery periods. This protocol is one of the most effective ways to improve cardiovascular fitness and VO₂max. FEATURES • Real-time heart rate monitoring via Bluetooth sensor or Apple Watch • Live coaching — tells you to pick up pace or slow down based on your heart rate zone • Execution Score (0–100) based on intensity, consistency, and recovery • Detailed post-workout analytics with heart rate charts and per-interval breakdown • VO₂max estimation after each session • Customizable warmup, interval, recovery, and cooldown durations • Treadmill speed and incline settings per stage • Full workout history with day, week, month, and year views • Supports English and Norwegian HOW IT WORKS 1. Connect your heart rate sensor and set your target zones 2. Start the guided workout, the app coaches you through warmup, four hard intervals with recovery, and cooldown 3. Review your Execution Score, heart rate chart, and per-interval breakdown Start training smarter today.

RunSharp — Run Faster. Train Less. The AI-powered running coach designed for experienced runners who want maximum results with minimum time investment. SMART TRAINING PLANS RunSharp generates personalized weekly training plans using ROI-based workout scoring. Every session is optimized to deliver the highest performance gains for your available time. PERSONALIZED PACE TARGETS All paces are calculated from your race times and fitness level. From VO2 max intervals to easy recovery jogs, every workout has precise pace guidance. TRACK YOUR PROGRESS See your training journey week by week with completion tracking, execution scores, and performance trends. Know exactly where you stand. EFFICIENCY DASHBOARD Your unique Training Efficiency Score shows how effectively you're using your limited time. See ROI breakdowns by workout type and weekly optimization trends. RACE PREDICTIONS Get estimated race times for 5K, 10K, Half Marathon, and Marathon based on your training data and the Riegel formula. KEY FEATURES • AI-optimized weekly plans based on your schedule • ROI-scored workouts (VO2 max, threshold, hills, long runs) • Automatic progression and adaptation • Apple Health integration for auto-tracking • Workout reminders and notifications • Comeback mode after time off • Skip and reschedule flexibility • Apple Watch companion app • Calendar export • Shareable workout cards DESIGNED FOR BUSY RUNNERS Whether you have 2 hours or 12 hours per week, RunSharp builds the most effective plan possible. No junk miles, no wasted time. Unlock RunSharp Pro with a one-time purchase and discover how smart training can transform your running. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.pragmatec.fi/apps/privacy