Research
Energy balance
Among dietary counseling interventions, those that combine diet and exercise result in statistically significantly greater weight loss during the active phase (first year) compared to diet alone, although this difference is not statistically significant during the maintenance phase.
If you want to maximize weight loss during the first year of a program, adding exercise to your dietary changes is more effective than diet alone. However, this advantage disappears once you stop the active program, so focus on sustainable habits for long-term maintenance.
GoodQualifiesMEDIUM confidence
At 12 months, during the active phase, participants who also exercised had statistically greater weight loss compared with those who received diet alone, but weight changes were similar in both groups at 3 and 6 months. During the maintenance phase, changes in weight were not statistically significantly different across studies, based on type of intervention.
Why this rating
Based on meta-analysis of slopes from multiple cohorts, though heterogeneity exists.
Source
Meta-analysis: The Effect of Dietary Counseling for Weight Loss
Michael L. Dansinger et al. · Annals of Internal Medicine · 2007
DOI 10.7326/0003-4819-147-1-200707030-00007
Meta-analysis · 46 studiesCited 468×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- Dietary counseling interventions produce a modest net weight loss of approximately 2 BMI units (6%) at 12 months compared to usual care, but this benefit diminishes significantly over time as participants regain weight during the maintenance phase.Good
- Patients with type 2 diabetes lose approximately half the weight achieved by non-diabetic patients through dietary counseling, and studies excluding diabetic patients report greater net weight loss.Good
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