Dr. Patrick Malartsik | Pain & Mobility Specialist on Instagram: "❌Stop doing sit-ups if your back hates you. The McGill modified curl-up trains your abs without cranking your spine into repeated flexion. How to do it: • One knee bent, one straight • Hands under your low back (maintain neutral) • Brace your core, lift head/shoulders slightly • No crunching Why it works: ✔ Builds core stiffness (not spine stress) ✔ Protects irritated discs ✔ Teaches your abs to support your spine, not bend it ✅ D

cURL là gì? Cách sử dụng Curl | TopDev

What Is Curl Command in Linux and How to Use It

How To Use cURL On Windows 10

Curl Up Demonstration

McGill Curl-Up - Muscle & Fitness