Build your core strength with this 5-week plank challenge designed to take you from 30-second planks to holding a 4-minute plank.

FEATURES:
• Progressive 5-week training program
• 20 guided workout sessions (4 per week)
• Built-in timer with countdown and progress bar
• Audio cues for start, pause, and completion
• Automatic progress tracking with checkmarks
• Individual workout reset options
• Screen stays active during exercises
• Clean, modern interface

TRAINING PROGRESSION:
Week 1-2: Foundation building (30-40 second planks)
Week 3: Intensity increase (45-second planks)
Week 4: Strength development (60-90 second planks)
Week 5: Final challenge (up to 4-minute plank)

Each workout includes multiple sets with optimized rest periods. Track your progress as you complete each session and build the core strength to hold a 4-minute plank.

Simple, effective, and proven results.