The Claim

In young adults, improvements in whole-body aerobic fitness, as measured by VO2peak and Wpeak, are similar during initial high-intensity interval training and during retraining following 12 weeks of detraining, suggesting the absence of a systemic physiological memory benefit at the organismal level.

Source: Human skeletal muscle possesses an epigenetic memory of high intensity interval training affecting mitochondrial function

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
39score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

How it works
1 study reviewed
In plain English

When young adults stop working out for 12 weeks and then start again with intense training, their fitness improves just as much as it did the first time—like their body doesn’t remember being in shape before.

See the scientific wording

In young adults, whole-body aerobic fitness (VO2peak and Wpeak) improves similarly during initial high-intensity interval training and retraining after 12 weeks of detraining, indicating no systemic physiological memory benefit at the organismal level.

What the research says

1 study

  1. Study: Human skeletal muscle possesses an epigenetic memory of high intensity interval training affecting mitochondrial function

    The study found that people got just as fit the second time they did intense training as they did the first, even after a break, so their bodies didn’t remember how to get fitter faster overall — which supports the claim.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

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