There’s a preacher who gives the same sermon every Sunday. Week after week, same message, same words. When someone finally asks him why, his answer is simple: once people start actually doing what I’m saying, I’ll move on to the next one.
That’s what we’re doing here. We’re going to keep talking about intensity until people start doing it. If you’d prefer to watch and listen to this conversation, you can do that here.
The Thing Influencers Won’t Tell You
Intensity isn’t glamorous. It doesn’t film well. It doesn’t generate the kind of content that feeds an algorithm. What it does is make you fitter — more than any novel exercise, any advanced protocol, any body part split, any accommodating resistance setup with chains and bands.
The number one factor driving improvement across every fitness goal — better blood markers, lower body fat, increased work capacity, stronger performance in everyday life — is intensity. There’s no shortcut around it. There’s no substitution for it. The fancier the content, the more likely it’s designed to pull you away from the discomfort that actually produces results.
Shorter Than You Think
Here’s what intensity actually looks like in practice: 10 to 20 minutes of real work. That’s it. Not two hours. Not a morning cardio session followed by an evening lift. If you’re working at genuine intensity, you don’t need more time than that, and if you’re going much longer, you’re probably not working that hard.
This surprises people who come from endurance backgrounds. Athletes who run 50Ks, log hours on bikes, or spend their weekends in the mountains walk into CrossFit skeptical that a 12-minute workout could offer anything meaningful. Then they do it. Then they do it again. And eventually they notice their recovery is faster, their hill climbing is stronger, and their body composition is shifting. Not because they added more volume, but because they introduced an intensity they weren’t getting anywhere else.
Intensity Doesn’t Have an Age Limit
One of the most damaging trends in fitness content right now is the idea that as you get older, you should do less — stop sprinting, avoid heavy lifting, skip the hard workouts. It sounds like caution. It’s actually the opposite of helpful.
Removing intensity from your training as you age is a path to deconditioning. It’s a path toward depending on other people for the things you currently do yourself. Squatting, deadlifting, sprinting, doing hard workouts — these are not things to phase out. They’re things to scale intelligently and keep doing. The weights come down. The mechanics stay sound. The intensity stays.
Because if you can’t sprint in training, you can’t sprint in life. And life will ask you to sprint — chasing a kid, hiking with a pack, playing a pickup game, handling an emergency. The training exists to make sure you’re ready when it does.
The Same Message, Over and Over
CrossFit’s approach hasn’t changed in more than 20-plus years: constantly varied functional movements, executed at high intensity. That’s not a failure of creativity. That’s the point. The fundamentals don’t need to be reinvented every week. They need to be done consistently, with great technique, and with enough intensity to actually drive adaptation.
The noise isn’t going away. The influencers aren’t going away. So, we’ll keep giving the same sermon. Warm up. Work hard for 10 or 15 minutes. Do it again tomorrow. That’s intensity. And that’s what works.
About the Author
Stephane Rochet is a Senior Content Writer for CrossFit. He has worked as a Flowmaster on the CrossFit Seminar Staff and has over 15 years of experience as a collegiate/tactical strength and conditioning coach. He is a Certified CrossFit Trainer (CF-L3) and trains athletes in his garage.