Maintenance needs its own phase, because reaching a target is not the end of the job. Research on structured weight-loss programs finds some regain is the usual pattern, but partial on average. Trendline's design choice, not a study finding: a range can represent maintenance more honestly than a single target, where every move above it looks like failure.
A finish line is a poor model
A tracker built around a target and a countdown has a problem: reach the number and the narrative disappears, even though the next phase requires learning what stability looks like in ordinary life.
Regain is common, and partial on average
Research on structured weight-loss programs is consistent on one point: some regain is the usual pattern. In six randomized trials in adults with overweight or obesity that compared diet plus exercise with diet alone, participants in both groups had regained almost half of their initial loss one year later (Curioni and Lourenco, 2005). A review of the field describes early loss, a plateau, then progressive regain as the typical course (Hall and Kahan, 2018).
These studies found partial rather than complete regain on average, which is not the popular claim that nearly everyone regains everything. In a trial of 1,032 adults with high blood pressure or high cholesterol who lost an average of 8.5 kg in a six-month program, 71% were still below their starting weight after a further 30 months of maintenance, three years after the program began (Svetkey et al., 2008). In an older analysis of 29 US programs, the average participant still being followed at five years had kept more than 3 kg off, though many participants had dropped out of follow-up by then (Anderson et al., 2001).
What helps keep it off
Programs designed for maintenance help, modestly. A review of 45 randomized trials in adults with obesity who had lost at least 5% of their weight found that behavioral programs covering both diet and activity reduced regain by about 1.6 kg at 12 months compared with controls, across 25 comparisons and about 2,900 participants (Dombrowski et al., 2014).
Self-weighing keeps appearing in this research. In the National Weight Control Registry, a group of people who had already kept off at least 30 pounds for a year, those whose weighing frequency fell gained about 4.0 kg over the next year, against 1.1 kg for those whose frequency rose (Butryn et al., 2007). That is an association in a self-selected group, not proof. In a randomized trial of 314 people who had recently lost weight, a program built around daily weighing cut the share who regained 2.3 kg or more over 18 months from 72% in the control group to 46% when delivered face to face and 55% when delivered online; only the face-to-face version also reduced average regain significantly (Wing et al., 2006). In that trial, daily weighing showed no sign of psychological harm (Wing et al., 2007).
Stable does not mean motionless
Maintenance still includes daily variation. Treating every move above a single target as failure turns normal noise into an alarm. A range can represent the job more honestly, while a sustained drift can still deserve attention. To be clear, that is Trendline's design choice, not a finding from the studies above.
The language should change
During a losing phase, a supported downward direction may align with the chosen focus. During maintenance, the same directional movement may indicate the range is drifting. The measurement did not change meaning by itself; the context did.
What about planned breaks during a diet?
Some people build maintenance periods into a diet rather than only at the end. The MATADOR trial randomized men with obesity to diet continuously or to alternate two weeks of dieting with two weeks at maintenance. Among the 36 who completed it, the 17 on the alternating diet lost more weight than the 19 who dieted continuously, though the alternating diet took nearly twice as long (Byrne et al., 2018). A later trial in 61 resistance-trained adults found no significant difference in weight or fat loss (Peos et al., 2021), and a 2025 pooled analysis of 12 trials found no overall body-weight advantage for diet breaks, though resting metabolism fell less with them (Poon et al., 2025). Breaks are an option, not a proven shortcut.
Make the handoff visible
Choose when the active phase ends, define a personally appropriate maintenance context, and continue observing without demanding a perfectly flat chart. The Goal Timeline tool makes this handoff visible without pretending to predict your body.
A note on goals
Trendline does not determine whether a target, rate, or range is healthy. Qualified professionals can help with goals affected by symptoms, medications, pregnancy, eating-disorder history, or other medical considerations.
Keep going
Trendline treats maintenance as a first-class phase, not an empty space after the goal.
Questions people ask
Do most people regain weight after a diet?
Some regain is the usual pattern. In six randomized trials, participants in both groups had regained almost half of their initial loss one year later (Curioni and Lourenco, 2005). The studies found partial rather than complete regain on average.
How many people keep the weight off?
In a trial of 1,032 adults with high blood pressure or high cholesterol who lost an average of 8.5 kg in a six-month program, 71% were still below their starting weight after a further 30 months of maintenance (Svetkey et al., 2008).
Does weighing yourself daily help keep weight off?
In a randomized trial of 314 people who had recently lost weight, a program built around daily weighing cut the share who regained 2.3 kg or more over 18 months from 72% in the control group to 46% face to face and 55% online; only the face-to-face version also reduced average regain significantly (Wing et al., 2006). In that trial, daily weighing showed no sign of psychological harm (Wing et al., 2007).
Do diet breaks help?
Breaks are an option, not a proven shortcut. A 2025 pooled analysis of 12 trials found no overall body-weight advantage for diet breaks, though resting metabolism fell less with them (Poon et al., 2025).
What does maintenance look like on the scale?
Maintenance still includes daily variation. Treating every move above a single target as failure turns normal noise into an alarm. A range can represent the job more honestly, while a sustained drift can still deserve attention. That is Trendline's design choice, not a finding from the studies.
Sources
- Curioni and Lourenco (2005), International Journal of Obesity: diet and exercise versus diet alone, long-term weight loss
- Hall and Kahan (2018), Medical Clinics of North America: maintenance of lost weight, a review
- Svetkey et al. (2008), JAMA: the Weight Loss Maintenance randomized trial
- Anderson et al. (2001), American Journal of Clinical Nutrition: long-term weight-loss maintenance, a meta-analysis of US studies
- Dombrowski et al. (2014), BMJ: interventions for weight-loss maintenance, a meta-analysis of randomized trials
- Butryn et al. (2007), Obesity: self-weighing and weight-loss maintenance in the National Weight Control Registry
- Wing et al. (2006), New England Journal of Medicine: a self-regulation program for maintenance of weight loss (STOP Regain)
- Wing et al. (2007), Journal of Consulting and Clinical Psychology: daily self-weighing and psychological outcomes in STOP Regain
- Byrne et al. (2018), International Journal of Obesity: intermittent energy restriction, the MATADOR trial
- Peos et al. (2021), Medicine and Science in Sports and Exercise: intermittent versus continuous energy restriction in resistance-trained adults
- Poon et al. (2025), Nutrition Reviews: diet breaks versus continuous energy restriction, a meta-analysis