Core · Four-week program

Core Killer

Build a stronger, more stable center for lifting, running, sport, and everyday movement.

4 weeksProgressive training plan
3× weekly15–25-minute sessions
2 levelsBeginner and advanced options

Athlete performing a controlled core exercise outdoors

What you will train

Core strength that carries over.

This program moves beyond endless crunches. You will train the core to resist unwanted movement, transfer force, and maintain control through progressively more challenging sessions.

Anti-extension

Control the ribs and pelvis while resisting excessive arching.

Anti-rotation

Build stability against twisting forces.

Lateral stability

Strengthen the side body and improve single-side control.

Controlled flexion

Develop abdominal strength through deliberate ranges of motion.

Athlete developing abdominal strength and control

Program structure

Progress without guesswork.

Week 1

Control

Learn positions, breathing, and foundational stability.

Week 2

Volume

Build capacity through carefully increased work.

Week 3

Challenge

Add leverage, resistance, and unilateral variations.

Week 4

Integration

Combine strength and control in complete sessions.

Athlete performing a bodyweight core movement

Athlete practicing controlled abdominal training

Who it is for

Independent exercisers who want dedicated core training that complements strength, endurance, or sport training.

Equipment

An exercise mat and resistance band are recommended. Substitutions are included where possible.

Before starting

You should be able to exercise independently without symptoms requiring medical evaluation.