It’s no secret that LeBron needs a rock-solid core to perform on the court. But, your abs are much more than the six-pack muscles you see. And, it's the reason why workouts that only focus on crunches leave you short on results, and high on risk for injury.

This workout is the opposite of what you might expect. No crunches. No weights. And nothing that appears to tough. But, once you perform this 4-exercise circuit, you'll realize why a new approach to training your abs was exactly what you needed. 

This core workout focuses on working your abs for a variety of angles, and makes slight adjustments to classic moves -- like planks -- to increase the difficulty and cause your abs to work harder than ever before. Follow this plan 2-3 times per week, either on it's own or after your normal workout, and you will help you unlock all of the benefits of great abs, including less back pain, better posture, and more strength in the gym or during your sports of choice.

The Core 4 Workout

How to do it: Perform this core workout as a circuit, completing one exercise after another while resting as little as possible. Once you complete all 4 movements, that's one set. Rest for 1-2 minutes, and then repeat the entire 4-exercise circuit 2-3 more times for a total of 3-4 sets. 

  1. Extended Plank: 20 seconds
  2. V-Ups: 10 reps
  3. Pot-stirrer-plank: 6 circles (in each direction)
  4. Knee Tuck: 15 reps