Hard:CORE: Underground Training Secrets for Strength & Performance (The Complete Athletic Strength Development System) Paperback – August 28, 2025

What do elite athletes know that most lifters don’t? The difference between good and game-changing performance comes down to one thing: real world core strength. And the truth is, real core strength isn't about holding a plank, it is about transferring (and controlling) forces in the weight room and on the field.Now, for the first time, world-renowned performance coaches Joe DeFranco and James “Smitty” Smith pull back the curtain on the exact methods they’ve used with top athlete and when teaching coaches, and trainers around the globe. The result? One of the most comprehensive and practical resources on true core training ever created.Unlike typical “core” programs that recycle the same tired sit-ups and crunches, Hard:CORE delivers a 3-dimensional approach backed by science, real-world application, and over 260 exercises. Yes, you read that right - 260 proven drills that will help you unlock rotational power, enhance stability, and build a rock-solid foundation for strength, speed, and longevity.This system isn’t just for elite athletes. Strength coaches, personal trainers, physical therapists, bodyworkers, and athletes of all levels will discover actionable strategies to improve performance, reduce injuries, and finally understand what the core really is - and how to train it.Inside Hard:CORE, You’ll Discover:How to instantly improve posture and mobility with targeted drills in Chapter 1.The importance of neutral posture and how it unlocks tight hips and thoracic spine mobility.Why most popular core training advice is completely wrong—and may actually make you weaker or more prone to injury.Proven soft-tissue methods and activation drills to boost core engagement and even improve your breathing mechanics.How proper breathing can increase strength potential and posture instantly.The secrets to developing rotational strength for superhuman athletic power.A brutally effective series of must-do exercises for every athlete—from pro to weekend warrior.Simple modifications to common exercises that can triple your stability and strength.Why core endurance is critical for eliminating low back pain and building resilience.How to rapidly strengthen the posterior chain, turning you into an immovable force.Breathing techniques that can help you smash PR's and lift heavier, safer.The differences between isolative vs. dynamic core strength—and when to train each.Why traditional “compound lifts + ab work” aren’t enough for real functional strength.The truth about how the body protects itself and develops true, sport-ready stability.Why This System WorksThe term “core” has become a fitness industry buzzword—yet 99% of the information out there is wrong. Most programs focus only on aesthetics or oversimplified movements. Hard:CORE fixes this by giving you:Over 260 detailed exercises for stability, strength, and rotationAn 80-page companion manual packed with progressions and templatesA balance of science and practical coaching cues you can use immediatelyProven methods used with elite athletes, pro teams, and world-class performersWhether you’re a coach designing programs, a trainer fixing client weaknesses, or an athlete chasing the next level of performance, Hard:CORE will change the way you train forever.SPECIAL NOTE: To gain access to the exclusive Hard:CORE video library, send an email to helpdesk @ dieselsc dot com with your Amazon order number! Read more