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Carlos Wiseman

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July 22, 2026

Why You Can't Skip the Warm Up (Even When You're Short on Time)

Let's be honest. Warm ups feel like the appetizer nobody ordered. You showed up to lift heavy or grind through a metcon, not to do a bunch of band pull aparts and air squats. But here's the thing. Skipping the warm up is like trying to start your truck in the middle of winter, slamming it into gear, and flooring it before the engine even has oil moving through it. Technically it might run. It's just not going to run well, and something's gonna wear out faster than it should.

Your body works the same way. Before you can ask it to move a heavy barbell or hold up under a nasty metcon, you need to prime two systems: your nervous system and your muscles.

Your nervous system is basically the electrical wiring between your brain and your muscles. It tells your muscle fibers when to fire, how hard to fire, and in what order. Cold nervous system means slow signals and sloppy recruitment. That's how you miss a lift you'd normally crush, or pull something on rep one of a workout. A good warm up wakes that wiring up. Light movement and a few progressively heavier warm up sets teach your brain to fire faster and recruit more muscle fibers at once, so when you get to your working weight, your body already knows what to do.

Your muscles need the same kind of heads up. Cold muscle tissue is stiffer and less pliable. Warm muscle tissue moves through range of motion easier and handles force better. Think of pulling a rubber band straight from the freezer versus one that's been sitting on your desk. One snaps. One stretches just fine.

Here's a simple example. Say you're deadlifting 300 pounds today. You wouldn't walk up cold and pull it. You'd do some hip openers, maybe some good mornings or kettlebell swings, then work up through the bar, 135, 185, 225, 275, before touching 300. Each one of those lighter sets isn't just practice. It's you literally teaching your nervous system the pattern and telling your muscles what's coming.

Same logic applies before a metcon. Get the heart rate up, move through the actual movements in the workout at a lighter intensity, and let your body rehearse before it's asked to perform.

Five extra minutes now saves you a setback later. Treat the warm up like part of the workout, because it is.

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