Research
Mixed
Exercise training fails to significantly increase aerobic capacity in p53-deficient mice, indicating p53 is necessary for the adaptive response to endurance training.
Not everyone adapts to endurance training with the same magnitude of mitochondrial improvement. If your genetic makeup (specifically p53 function) is suboptimal, your aerobic capacity may not improve significantly with standard training protocols, regardless of effort.
GoodQualifiesHIGH confidence
the work capacity of p53-/- was relatively unresponsive to training, accentuating the difference observed between p53+/+ and p53-/- mice
Why this rating
Clear experimental design comparing trained vs untrained knockout mice.
Source
p53 Improves Aerobic Exercise Capacity and Augments Skeletal Muscle Mitochondrial DNA Content
Joon‐Young Park et al. · Circulation Research · 2009
DOI 10.1161/circresaha.109.205310
mechanism_onlyCited 194×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- The presence of functional p53 is required for maximal aerobic exercise capacity and the training-induced increase in skeletal muscle mitochondrial DNA content via the regulation of TFAM transcription.Good
- p53 regulates skeletal muscle mitochondrial DNA (mtDNA) content by directly interacting with and transactivating the Mitochondrial Transcription Factor A (TFAM) gene.Good
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