Research
Adherence
Interventions that measure exercise duration as an outcome variable yield larger effect sizes than those that do not.
When designing or following an activity program, focusing on how long you exercise (duration) may be a more effective strategy than focusing solely on how often (frequency) or how hard (intensity).
ModerateQualifiesMEDIUM confidence
Studies including a measure of exercise duration as an outcome variable (Table 3) reported larger effect sizes (dwc = .38 ± .12, k = 23) than studies without a duration measure (dwc = .25 ± .10, k = 19).
Why this rating
Statistically significant, but likely reflects measurement artifact or focus rather than a distinct physiological mechanism.
Source
Interventions to increase physical activity among aging adults: A meta-analysis
Vicki S. Conn et al. · Annals of Behavioral Medicine · 2002
DOI 10.1207/s15324796abm2403_04
Meta-analysis · 43 studiesCited 240×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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- Increasing physical activity from a sedentary lifestyle to an active one in middle adulthood significantly reduces the risk of coronary events compared to remaining sedentary.Strong
- Resistance exercise is the only intervention capable of consistently restoring muscle function and strength in sarcopenia, partially overcoming age-related anabolic resistance.Strong
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