Nadia terminated this year only her studies for the Universitary degree. Till when she was in the University, she trained once per day only, now she increased a lot the mileage, and of course inside the mileage the quality.
When 15 years old, she used to compete in mountain races too, had full seasons of cross country, and tried all the distances we have in Italy for the Youth category (included 2000m steeple).
Always was a big talent, reaching good results with very little training, and when there is talent, if an athlete is able to train in professional way, can have big jumps of quality.
Not only, but people must become able to understand the evolution of every career.
For example, you have a PB of 16' in 5000m when 18, in the only attempt in a local race, but already are able to run 1500m under 4'15", and are the best in Cross Country (also in Europe, in every age category). You don't run 5000m for the next 3 years, but continue to improve your shape, and when finally run 5000 again (after 3 years) your PB in 1500 is no more 4'15", but 4'05". In this situation, becomes normal running 15', and with this limit to go to Tokyo Olympics in 2021, arriving till the final.
Everything logic for who knows athletics, and is interested to know the progression of the athletes, looking at the connection between different distances, and the number of races run every season.