You’re not taking progress photos or measurements. Would data help you stay motivated?
The Short Answer
Probably yes. The scale only captures one dimension, and day-to-day fluctuations make any single reading a poor guide to real progress. Photos and measurements capture changes the scale misses: body composition shifts, fat redistribution, visible differences that accumulate gradually. More importantly, they provide objective evidence against the “nothing is changing” narrative that can derail motivation during plateaus.
Something to Sit With
You see yourself every day. The gradual changes are invisible because you’re too close. But a photo from three months ago compared to today might show a different story.
What would the data show that your daily mirror doesn’t?
Learn More
Why the scale isn’t enough. The number on the scale measures total body weight, which includes:
Water. Weight swings from one day to the next with hydration, sodium, hormones, and other factors, and none of that movement is fat.
Muscle. If you’re exercising, you might be gaining muscle while losing fat. The scale might not move, or might go up, while your body is improving.
Gut contents. The weight of food in your digestive system varies.
Glycogen. Changes in carbohydrate intake affect glycogen stores and associated water.
These fluctuations can obscure real fat loss, making days or weeks of progress invisible. Worse, they can be demoralizing: you do everything right, and the number doesn’t move.
One honest caveat before we leave the scale behind: “unreliable day to day” is not the same as “not worth using.” Among National Weight Control Registry members (people who had already kept substantial weight off), those who cut back on how often they weighed themselves regained about 4 kg over the following year, while those who weighed in more often than before regained about 1 kg. The difference held even after accounting for changes in their other weight-control behaviors.[1] The case below is for adding measures the scale can’t give you, not for throwing it out.
What photos and measurements capture. Progress photos and body measurements track what actually matters:
Visual change. A photo shows how your body looks, which is often what you actually care about, more than a number.
Body composition. Measurements of waist, hips, thighs, and arms can show fat loss even when weight is stable.
Gradual shifts. Changes that happen slowly are invisible day-to-day but obvious when comparing photos months apart.
Reality check. The mirror lies because you see yourself constantly. Photos provide an outside perspective.
How to do it effectively.
Consistent conditions. Same time of day (morning is best), same lighting, same clothing (or minimal clothing), same poses. Consistency makes comparison valid.
Multiple angles. Front, side, and back. Different areas change at different rates.
Regular interval. Weekly or biweekly photos: often enough to catch change, spaced enough that you’re comparing something to something.
Measurements that matter. If you keep only one, keep the waist, measured at the same landmark every time. Where fat sits carries information the total does not: waist circumference is a strong correlate of clinical outcome, diabetes especially, independent of BMI.[2] Add hips, thighs, chest, and arms if you want more detail.
Store without judging. Take the photo, file it, move on. Don’t analyze each one: they’re data points for future comparison.
The motivation function. Progress photos serve motivation in several ways:
Proof against plateaus. When the scale stalls, photos might show visible change. This counters the “nothing is working” story.
Long-term perspective. Comparing today to three months ago (not yesterday) shows meaningful change that daily observation misses.
Objective evidence. Your brain’s narrative about your body isn’t always accurate. Photos provide reality.
Celebration opportunity. Sometimes you’re doing better than you think. Photos can reveal that.
More broadly, successful maintainers report using more self-regulation strategies than those who regain, self-monitoring among them. The study behind that is small (33 undergraduates, surveyed once), and reported use is not evidence that the strategies are what worked.[1]
The objection: it feels vain or obsessive. Taking photos of yourself might feel uncomfortable. But the alternative, no objective data, leaves you relying entirely on how you think you look on a given day.
Think of it as data collection, not vanity. You’re gathering information to guide your efforts.
Further reading:
- Ferriss T, The 4-Hour Body[3] (2010) — Chapters on measurement and tracking
- Klem ML et al., “A descriptive study of individuals successful at long-term maintenance of substantial weight loss”[4] — American Journal of Clinical Nutrition, 1997
- Clear J, Atomic Habits[5] (2018) — The importance of measuring progress
Written by AI, directed and approved by me. How this is made →