Eight minutes, done properly, does everything a long warm-up does. The rest is a mobility hobby that has quietly replaced training for a lot of people.
There is a particular kind of gym-goer who spends thirty-five minutes on the floor with a foam roller, a band and four different hip stretches, then does three sets of something and goes home. I was that person for about a year, so this is not a cheap shot.
The warm-up here is eight minutes. It is enough. Here is what those eight minutes are actually for and why the other thirty-two are optional.
What a warm-up does
Three things, and only three.
It raises your temperature. Muscle is more compliant when it is warm and it takes about three minutes of easy work on a bike or a rower to get there. This is the least interesting part and the one nobody skips.
It takes the joints you are about to use through the range you are about to use. Ankles and hips before squats, shoulders and thoracic spine before pressing, hamstrings and hips before pulling. Moving through the range, not holding a stretch in it.
It rehearses the movement. This is the part that does the most work and gets the least attention. Three sets of a squat pattern with nothing on the bar tells your nervous system what is about to happen. It is why the third warm-up set always feels better than the first.
That is the whole list.
What a long warm-up adds
Some genuine things, for some people, in specific circumstances.
If you have a stiff ankle from an old break, you need more ankle work than the class warm-up gives you, and you should do it. If you sit at a desk for nine hours you probably need more thoracic work. These are real and a coach will tell you what to add.
What a long warm-up mostly adds, though, is the feeling of having done something, without the inconvenience of having done anything hard. Static stretching before lifting slightly reduces how much force you can produce for the next twenty minutes or so. Foam rolling makes a joint feel looser for a handful of minutes and does not change the tissue. Neither is harmful. Neither is training.
The honest version
If you spend forty minutes warming up and twenty minutes lifting, you have a mobility practice, not a strength programme. That is a completely reasonable thing to have. It is just worth knowing which one you are doing, because the first one will not make you stronger and you may well be expecting it to.
What we actually do
Eight minutes, led from the front, the same for everybody: three minutes easy on a machine, then hips, ankles and shoulders, then the empty bar.
If you need more than that, a coach will tell you what and why, and it will be two or three specific things rather than a routine off the internet. Come in ten minutes early and do them. The room is open.
