In a community of Olympians, the idea of not training on the weekend would be considered laughable and a non starter. It's the same in any field if you want exceptional results.
Olympians are also religious about taking care of themselves. They absolutely will take off as much time as they need to make sure they're performing at their peak.
And many training for this kind of performance will fail, achieving nothing (or injuries).
Apples to oranges.
The equivalent of training in the IT field is learning, not working.
With exceptional pay, working at weekends sounds not too bad.