Yes, let me summarize what we have learn from studies here:
temporary residual lengthening (even lasting for many weeks) is produced with low/loads-long time stretching;
permanent residual lengthening is produced with high loads and recovery, as a result of repairing damages in CT.
Microfailures are repaired and/or cellular proliferation is the adaptive response to sub-failure damage. Maybe such last adaptive response is best activated by cyclic medium load (so, multiple ‘sets’ of applying the stretching for short time, but done at high frequency) than by low loads applied in a continuous way, for long time.
That’s all, since here.