Kilian Jornet shares some essential training advice. He touches on athletes who start training later in life, especially those who take on a high training volume while also working and having a family. This means that they have a lot going on besides only training. Kilian points out that whenever you train, it adds stress to your system. Because of this, it is important to remember that time spent at work and/or with family is not necessarily rest for your body.
A key takeaway: Training is a long-term progression. As best you can, slowly build up to higher training volumes.