Kill your workout with Insidious by Murdered Out It's time to murder the competition with our brand new, high-performance pre-workout supplement, Insidious. Designed to exceed the needs of fitness fiends, gym-goers, and sports-pros everywhere. Insidious is packed full of powerful ingredients that combine to supercharge your physical performance, again and again. Helping you to stay stronger, react quicker, last for longer, pump harder, and recover better. We know you're hell-bent on maximising every second of every workout you do. But to do that, you need the fuel to fire up your energy levels, push through the pain, and get past the demons in your head. That's what we designed Insidious to do. Ignite your physical potential so you kill your workouts every time and go way beyond your personal best. Without feeling like you've been to hell and back afterwards.