Research
Hormonal
Increasing age is inversely associated with cardiorespiratory fitness (CRF).
As you age, your cardiorespiratory fitness tends to decline. This is a common trend, but it is not a life sentence. You can counteract this decline by maintaining regular physical activity, which helps preserve your fitness levels and overall health as you get older.
StrongRefutesHIGH confidence
age (inverse)... [was] independently and consistently associated with CRF.
Why this rating
More than 80% of samples found a negative association with CRF, indicating fitness declined with age.
Source
Correlates and Determinants of Cardiorespiratory Fitness in Adults: a Systematic Review
Johannes Zeiher et al. · Sports Medicine - Open · 2019
DOI 10.1186/s40798-019-0211-2
systematic_reviewCited 170×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- Higher levels of leisure-time physical activity are consistently and positively associated with higher cardiorespiratory fitness (CRF) in adults.Strong
- Higher body mass index (BMI), body weight, and waist circumference are inversely associated with cardiorespiratory fitness (CRF).Strong
- Male sex is associated with higher cardiorespiratory fitness (CRF) compared to female sex.Good
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