Brothers and sisters of intensity — welcome to HEAVY DUTY NATION. I’m Markus Reinhardt. Some of you know me from my eBooks, coaching, or YouTube channel, but here’s the bottom line:I trained with Mike Mentzer at Gold’s Gym Venice. I lived his philosophy. And I built this community to carry his Heavy Duty legacy forward — raw, unfiltered, and alive. This group is for those who refuse mediocrity. Who want to build muscle and burn fat in the most efficient, savage way possible. No gimmicks, no wasted sets, no excuses. 🔹 What You’ll Get Here: - True HIT Knowledge — the principles I learned directly from Mentzer. - Training & Nutrition Guidance — how to execute Heavy Duty for body recomposition. - Community Firepower — like-minded lifters who actually get it. - Direct Access — ask me questions, post your progress, share your battles. - Weekly Live Chats + Q&A — every week I’ll go live right here in the group to break down HIT, answer your questions, and keep you moving forward. 🔹 How to Get Started: 1. Drop a quick intro post — tell us who you are and your goals. 2. Dive into the discussions — don’t lurk, engage. 3. Share your workouts, progress pics, and questions — this place thrives on participation. This is more than a group. It’s a movement.We are HEAVY DUTY NATION. Now — let’s get to work. Markus

Posted by Markus Reinhardt | Heavy Duty Nation Brothers, I’ve been refining a new HIT-style hamstring finisher — and it’s one of the most brutally effective protocols I’ve ever used. Most lifters don’t truly understand how to train the hamstrings. They’re a bi-articular muscle group, meaning they cross both the hip and knee joints. Depending on the angle, you’re stressing completely different fiber lengths and tension curves. That’s why the seated leg curl and lying leg curl aren’t interchangeable — they target different mechanical ranges: - Seated Leg Curl: Hips flexed, hamstrings in a lengthened position. This creates higher tension on the long head of the biceps femoris — the deep growth zone most people never reach. - Lying Leg Curl: Hips extended, emphasizing the shortened range and peak contraction — hammering the semitendinosus and semimembranosus for that dense, round look. Most people move too fast, neglect the eccentric phase, and never hold the stretch. That’s why they don’t grow — they stimulate, not annihilate. The key is precision under fatigue — control the negative, feel the stretch, and make one set do the work of 10 It’s not about doing more. It’s about doing it right — with full intent, until the muscle can’t perform another inch of movement. The trick is to position the joint so you can recruit different fibers to their full potential. That’s why I program both seated and lying curls — not to waste time, but to eliminate weak points. — Markus Reinhardt Founder, Heavy Duty Nation Student of Mike Mentzer | Star of The HIT Video What do you guys want me to cover next? Drop your ideas below — biomechanics breakdowns, muscle-specific protocols, or Mentzer principles you want dissected and applied to real training. Let’s keep pushing the standard of Heavy Duty forward.