
Why Can't I Lose Weight? What Reddit Actually Says
Real threads from r/loseit and r/dietetics on the reasons weight loss stalls completely — not a plateau after progress, but never moving at all.
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A weight loss plateau is when the scale stops moving for several weeks despite sticking to your diet and exercise. Most of the time it's not a "real" stall — it's water retention, a lower TDEE from losing weight, or small tracking drift closing the gap on your deficit. Reddit's r/loseit and r/CICO communities consistently point to the same handful of causes and fixes, and they rarely match the vague "just eat less" advice that generic articles repeat.
If the stall has lasted under 3-4 weeks, it's probably water retention or normal fluctuation — keep going. Past that, recalculate your calorie target against your current (lighter) weight, since your TDEE drops as you lose weight, and double-check your tracking for portion creep. A short diet break at maintenance calories is the most repeated fix for a genuine multi-week stall.
The most common mistake is panicking too early. Asked directly how long plateaus typically last: "I have been stuck at the same weight that fluctuates .5 everyday for 10 days. I know it's not a long time but with the amount of activity I have been..." putting in, it felt longer than it was. (r/loseit, "How long do your plateaus last?", 30+ comments) The recurring answer across similar threads: under 3-4 weeks of a stalled scale is normal noise, not a metabolic problem.
Asked what's actually happening mechanically: "Plateaus can last for weeks or months. Some reasons for water weight include: Heavy exercise, Alcohol, Salty dinners, Your pe..." menstrual cycle stage, and general hormonal fluctuation — all of which mask real fat loss on the scale without meaning the deficit stopped working. (r/loseit, "How do plateaus work?", 40+ comments) A more detailed breakdown from a separate thread lists the mechanism without the vague hand-waving: "This information does not constitute medical advice or diagnosis. There are many reasons why weight loss plateaus can happen:" water retention, lower TDEE from a lighter body, and tracking drift where portions quietly grow. (r/loseit, "Why do weight loss plateaus happen?")
A thread specifically about training-related water retention adds another common trigger: "If you JUST started the workout regime then it could be you keeping more body water. Wheneve..."r you add a new type of training stress, your muscles hold extra water for repair — a very common false alarm right after starting a new program. (r/MacroFactor, "My weight is plateauing despite deficit", 30+ comments)
For a genuine multi-week stall, the most repeated advice isn't to cut calories further — it's the opposite. Responding to someone stuck for weeks: "If your weight remains plateaued, hit maintenance for a month or two then diet again. If your weight starts to go down, and you feel good,..." continue dieting; if not, the maintenance break itself was likely needed to reset. (r/MacroFactor, "My weight is plateauing despite deficit") A separate thread frames the practical numbers version of the same fix: "If you plateau for 3-4 weeks you need to increase your weekly steps(1-2k more a day) or decrease your calories 100-200 per day to keep fat loss..." moving, rather than making a drastic cut all at once. (r/workouts, "Dropping weight. How do I get past a plateau?", 80+ comments)
Asked how people specifically broke through, one of the clearest community-sourced breakdowns separates the real cause from the fix directly: "There are different types of plateaus: Actual plateaus — This happens when your BMR decreases enough that your deficit calorie..." target is no longer accurate, which is exactly why recalculating instead of just "trying harder" is the right move. (r/CICO, "How did you overcome your Weight loss plateau?")
Nearly every thread above points at the same root cause eventually: your calorie target was calculated once, at your starting weight, and never updated. As you lose weight, your TDEE drops — the same deficit that worked at week 1 can quietly become maintenance by week 8. Manually recalculating every few weeks is the workaround most Reddit threads recommend, but it's also the exact reason people miss it — nobody remembers to redo the math while life is happening. PonteFuerteAI recalculates your target automatically as your logged weight changes, so the plateau fix Reddit recommends happens without you having to notice you need it.
Reddit's consistent answer is that anything under 3-4 weeks is normal scale fluctuation, not a real plateau. Water retention from exercise, sodium, or hormonal cycles commonly masks fat loss during this window.
Your TDEE drops as you lose weight because a lighter body needs fewer calories, so a deficit calculated at your starting weight can shrink to maintenance over time. Tracking drift (unlogged bites, growing portions) closes the gap further.
Not immediately. The most repeated Reddit recommendation for a genuine multi-week stall is a maintenance-calorie diet break for 1-2 weeks first, then recalculating your deficit against your current weight — not an immediate further cut.
If the stall coincides with a new workout routine, high sodium intake, or your menstrual cycle, it's very likely water retention and will resolve on its own within 1-2 weeks. A stall that persists past 3-4 weeks with no obvious water-retention trigger is more likely a real plateau needing a recalculated calorie target.

Written by
Alberto MenéndezPersonal trainer · Software developer · Founder of PonteFuerteAI
Over 10 years of training experience across three continents. Certified personal trainer who coached clients in Spain, India, and Japan before building PonteFuerteAI — the all-in-one AI fitness app he always wished existed.
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