The best warm up before sprinting switches your nervous system on, it doesn't calm it down. That means short, quick ground contacts, every drill snapping off the ground, with rhythm, timing and speed. If your warm-up is 20 minutes of jogging, you're putting your nervous system into economy mode right before you need it at maximum.
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Let me be straight up. Most warm-ups are terrible.
Why most warm-ups get it backwards
I'm not just talking about speed sessions. This applies to any high-level skill that has to be done fast.
You cannot get better at skills that need to be done fast by practising them in a slow nervous system state. The nervous system has to be firing before you even start the real work.
Think about what a long slow jog teaches your body. Long ground contacts. Low effort. Steady rhythm. That's the opposite of a sprint. Then you ask the same body to hit its best in the first rep. See the problem?
The best warm up before sprinting: what it should feel like
The goal of a warm-up is to activate the nervous system, not relax it.
Here's what I want to see:
- ✓Short ground contacts. Ground contact time is how long your foot stays on the ground each stride. In the warm-up, every exercise should be quick off the ground.
- ✓Snapping off the ground fast. Not pushing, not grinding. Snap.
- ✓Rhythm and timing. Drills done with a beat, not just ticked off a list.
- ✓Speed that builds. Each drill a bit sharper than the last, so you arrive at your first real rep already switched on.
That's what sparks the nervous system into a firing state. I'm talking real firing: adrenaline, dopamine, a survival-level alertness running through your body.
Why it decides the whole session
That switched-on state has a name. It's the flow state, and the flow state is what lets an athlete hit that 101% mark. That's where supercompensation comes from, the nervous system adapting to a level higher than before.
Your nervous system will only fire as many muscle fibres as it feels safe to. If it's been there before, it fires. If it hasn't, it won't. A sedated, half-asleep nervous system isn't going to open the doors for a personal best.
So the warm-up isn't a box to tick before the session. The warm-up determines the session and how much you're going to get out of it.
And that matters more than people realise. In our own testing across around 1,000 athletes, a single flat out speed session at 100 to 105% of your best costs 7 to 24 days of full neurological recovery. Those are our own figures, not a published study, and they're days to 100% neurological freshness, not days until you can train. If you're going to spend that on a session, you want the session to count. A bad warm-up wastes it. More on this in how long to recover after sprint training.
Activate, do not sedate
If you remember one line, remember this one. Activate, do not sedate.
That doesn't mean skip the warm-up or go flat out cold. It means every part of the warm-up should be moving you toward fast, not away from it. Quick feet, quick contacts, sharp rhythm, then build into your runs.
Use the same warm-up to track your fatigue
Here's a second reason to keep your warm-up the same every time.
Pick one neural test, either a 10 m sprint or a countermovement jump (a jump straight up from standing), and do it at the start of your very first session of the week. Same warm-up, same time of day. Write the number next to how your legs feel.
Within a month you'll see the two stop matching. Your legs will say great and the number will say flat. That gap is your built-up fatigue, and you can only see it if the warm-up before the test is the same every week. Change the warm-up and you've changed the test. Does that make sense?
You can read more about that gap in muscle fatigue vs nervous system fatigue.
The bigger picture
The warm-up is one small piece. Speed has more than 100 subcategories underneath it: the first 5 m, top speed, ground contact, shin angle and the rest. At Ambition every session is timed and reviewed on film, so we see what the warm-up does to the first rep and the last. We assess, find what's costing you the most, fix it in order, and measure.
Switch it on before you ask it to perform.