What we know about detraining:

➡️Strength can be maintained for 3-4 weeks before decline

➡️Muscles start to atrophy after 2-3 weeks

➡️Endurance decreases by 4-25% after 3-4 weeks

➡️VO2 max declines by 6-20% at around 4 weeks
- To maintain strength & hypertrophy during 4+ weeks off, train once per week.

- To maintain endurance during 4+ weeks off, you can lower volume by 60-90% and frequency by 20-30%. Intensity should remain the same.
Sources:

- McMaster et. al, 2013
- Costa et. al, 2016
- McMahon et. al, 2014
- Fisher et. al, 2013
- Mujika et. al, 2001
- Mujika et. al, 2000
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