Mixed
Increasing cardiorespiratory fitness (CRF) or physical activity (PA) consistently reduces all-cause and cardiovascular mortality risk, whereas intentional weight loss does not consistently reduce mortality risk and may increase it in healthy individuals.
Prioritize increasing your physical activity and cardiorespiratory fitness over focusing on weight loss. Regular exercise provides consistent mortality benefits that are independent of whether you lose weight. If you are overweight or obese, becoming 'fit' significantly lowers your health risks, often more effectively than trying to lose weight alone.
increases in CRF or PA are consistently associated with greater reductions in mortality risk than is intentional weight loss
Why this rating
Based on multiple meta-analyses of observational studies and RCTs cited in the review.
Source
Obesity treatment: Weight loss versus increasing fitness and physical activity for reducing health risks
Glenn A. Gaesser et al. · iScience · 2021
DOI 10.1016/j.isci.2021.102995
More from this paper
- High cardiorespiratory fitness (CRF) attenuates or eliminates the mortality risk associated with high BMI, such that 'fit' obese individuals have lower mortality risk than 'unfit' normal-weight individuals.Strong
- Intentional weight loss is not consistently associated with reduced mortality risk and may increase mortality risk in healthy individuals.Good
Related findings · Mixed
- Bariatric surgery (VSG and RYGB) is the most effective and sustainable treatment for obesity, producing marked and sustained weight loss that non-surgical interventions cannot match.Strong
- Severely protein-deficient diets (2–3% energy) induce lean body mass loss and metabolic imbalance, whereas adequate protein intake (0.66 g/kg/d minimum) is a prerequisite for maintaining muscle, bone, and physiological function.Strong
- For patients with Class III obesity (BMI >39.9 kg/m2), metabolic bariatric surgery (MBS) is significantly more effective than any currently approved medication, with BilioPancreatic Diversion (BPD) showing the highest estimated weight loss.Strong
This is one finding among thousands. Every one is graded and traced to its source, so you can see what the evidence actually supports. Browse the research →