21 Day Core and Abs Challenge: Build Strong Abs and Core Strength in Just 5 to 20 Minutes a Day (Paperback) (ISBN-13: 9798278757337)

Build a stronger core in just 21 days with short, effective workouts you can do at home.

The 21 Day Core and Abs Challenge is a progressive home workout program designed to strengthen your abs, obliques, and deep core muscles without long gym sessions or complicated equipment. Workouts start at just 5 minutes and gradually increase to about 20 minutes, making this challenge approachable for beginners while still challenging for advanced users.

Each day features a completely unique workout using a mix of strength training, HIIT, circuits, isometrics, and functional core movements. You'll build stability, improve posture, and develop real core strength that carries over into everyday life and other workouts.

No equipment is required, though a light dumbbell can be used for added intensity. Beginner and advanced options are included so you can train at your own level and progress safely.

If you're ready to commit to 21 days of focused core training that fits into a busy schedule, this challenge is for you.