How many repetitions does it take?

3 sets of 10 repetitions at 70% of 1RM (maximum capacity in one repetition)…do we wish that the “dosage” to make a change in the brain (learning) were more standardized? Fortunately or unfortunately, learning does not take a set # repetitions, time – and is rather stimulated to make a change under:

Constraints (I am forced to choose an option as others are restrained)

Avoidances (this is not a desirable outcome: fall, pain, dropped pass – I must get this right)

Incentives ($, applause, dopamine, taste, other reward)
 
So, the change is dependent on significance, salience and strength of stimulus.