Research
Cellular
Significant increases in fibre CSA require at least 6-7 weeks of regular resistive training at reasonably high intensity.
To achieve significant muscle growth, a training period of at least 6-7 weeks is necessary.
StrongSupportsmedium confidence
The exact time-course for muscle fibre hypertrophy is not well-documented but appears to require at least 6-7 weeks of regular resistive training at reasonably high intensity before increases in fibre CSA are deemed significant.
Why this rating
The claim is based on a synthesis of existing knowledge in the field.
Source
Short-Term Training: When Do Repeated Bouts of Resistance Exercise Become Training?
Stuart M. Phillips · Canadian Journal of Applied Physiology · 2000
DOI 10.1139/h00-014
otherCited 114×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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