TJ Walker examines how ChatGPT and Claude are becoming fitness coaches, offering cheap and judgment-free plans that help beginners and self-conscious exercisers. The catch: AI can't see your form, makes planning mistakes like impossible mileage totals, and may push you into overtraining instead of pushing back.
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Ultimize. According to reporting from The Times, a growing number of everyday athletes are now turning to AI chatbot tools like ChatGPT and Claude to act as their personal trainers, building custom workout plans, analyzing performance data, and even offering motivation after tough sessions. And at first glance, this sounds like the most 2026 sentence ever. Hey, I didn't hire a coach. I hired a robot that compliments me and tells me to drink a protein shake, which, let's be honest, is already better than half the trainers at big box gyms. Great job today, man. Same workout tomorrow. Thank you, Chad. That was worth $120. Now let's be fair because there are real positives here. For a lot of people using these AIs, it's a breakthrough. You don't have to spend hundreds of thousands or thousands of dollars on coaching. You don't have to schedule sessions. You don't have to get in your car, drive 30 miles each way and make awkward small talk with someone counting your reps and then drive home thinking, I could have Googled that. You just open your phone, you ask a question and instantly you have a plan. For beginners especially, that can be huge. Now, the article in The Times points out that people who might never have hired a Coach are now getting structured training plans, feedback, and consistency, things that actually matter more than fancy equipment or elite gyms. There's also a psychological benefit. Some people are too self-conscious to work out in front of others. They don't want a trainer watching them struggle. They don't want to feel judged. With AI, there's none of that. You can ask dumb questions. You could admit you skipped workouts. You can say, hey, I ate an entire pizza. And the AI won't sigh or raise an eyebrow. It'll just say, "Let's adjust your plan," which frankly is more emotional support than most humans provide. And for experienced athletes, the upside is different but just as real. AI can act like an assistant. It can organize training, refine pacing, help structure ideas. In one case, an athlete used ChatGPT to prepare for a half Ironman and actually hit his goal even in brutal conditions. That's not nothing. That's real value. So yes, there is democratizing coaching. It's doing it. It's making guidance accessible, affordable, and immediate. That's a good thing. Let's be fair. But, and you knew it was going to come to this, there is a big but, because there's always a but. There are real downsides. We shouldn't pretend otherwise. First, AI is only as good as the information you'll give it. Doesn't necessarily see you unless you take pictures and feed that in. Doesn't watch your form. And then, you know, you could in theory hold your cell phone and take pictures of everything you do, but most people aren't doing that. It doesn't notice that your knee is doing something weird or that your posture is slowly turning into a question mark. As one coach in the article points out, human trainers rely on context and nonverbal cues. AI kind of exists in a vacuum, which is a polite way of saying it has no idea what you actually look like when you're struggling most of the time if you're just talking to it. Second, it makes mistakes, sometimes really simple, basic ones. In one example, the AI created a training plan where the mileage didn't even add up, which is not ideal. Great news, you're running 40 miles this week somehow in 3 days. Even elite athletes noticed issues. One experienced runner said the AI overestimated his abilities based on past data and gave him workouts he simply couldn't complete. That's not just inconvenient, it could lead to injury. And that's the real risk here— overtraining. Pushing too hard. Following advice that sounds confident but isn't really grounded in reality. Because here's the thing about AI, it always sounds sure of itself, even when it's wrong. It's like having a coach who never hesitates. Trust me, you can do this. No, I really can't. Trust me. Third, and this one is subtle, it can tell you what you want to hear. You know, the pandering. One runner in the article even acknowledged this. If you're not careful, you can end up using AI not as a coach, but just as a cheerleader. And cheerleaders don't necessarily improve performance. They can improve mood, which is great until you're trying to run a marathon. So here's the balanced reality. AI coaching can be incredibly useful for beginners. It can be life-changing if it just gets you started. For everyone else, it removes friction, but it's not a replacement necessarily. It's not a replacement for serious trainer who can really work with you in depth in a serious manner and know exactly the nuances you need to help you get to the next level. So if you're a professional trainer, relax, I'm not telling you that you are now irrelevant. But if you are someone trying to get in better shape, more physically fit, and you're just telling yourself, well, I'd love to get fit, but I don't have the money for a personal trainer, ah, you've lost that excuse. You should start right away if you have no money for a trainer using AI chat. It could be ChatGPT, which I subscribe to. It could be Claude, which Believe it or not, I just subscribed to that today as well. I'm gonna start using both, but it could be others too. And if that's what it takes to get you off the couch, then overall it's probably a good thing because let's face it, the number one problem most people have is frankly not overtraining. The biggest problem most people have, especially most Americans these days, is we're sitting back, on the couch staring at this, the cell phone in your hand. Anything that can get you away from that, it's a step in the right direction. I'm— Ultimize.
