Fred Duncan on Instagram: "Isometrics are one of the most undervalued tools in training. I use them everywhere, from rehab and tissue remodeling, to motor learning, to performance work. That includes yielding isos (holding against load), overcoming isos (pushing into an immovable object) and pairing them with dynamic movements. In rehab, they’re often our first step back to movement. Studies have shown that even a few days of unloading can reduce tendon collagen synthesis and stiffness, so we ca

Fred Duncan on Instagram: "Fatigue doesn’t just slow you down, it changes how you move… If you’re training true max velocity, fatigue is the enemy…you want the highest possible outputs, quality mechanics, and full recovery between reps. Once fatigue creeps in, speed drops, and so does mechanical efficiency. But for field and team sport athletes, fatigue is unavoidable. They play and sprint under constant metabolic load…lactate, ion shifts, accumulated stress, and the body has to find new ways to

Fred Duncan on Instagram: "Can Muscle Make You Slower? This isn’t an anti-strength or anti-muscle post. I actually dedicate an entire chapter to this in my latest e-book, Speed Kills. For most athletes, the answer is simple…you do need more muscle and you do need to get much stronger. But at a certain point, it becomes less about adding and more about refining. This is for the people who like nuance, who think beyond trends and start viewing performance through a sharper lens. More scalpel than