In high school – that is, only few years ago – I was an avid member of our school's automated data programming club. There we, for example, practised programming languages BASIC and FORTRAN after school. Unfortunately, the school did not have any computers! So, we wrote our BASIC and FORTRAN codes only on paper.
First, because of rapidly changing technology, the payoff period for any training has become shorter and the need for the continuous upgrading of skills greater. Second, research suggests that successful training depends on the design of the training program, not on the age of the trainee.