It is possible to improve your climbing abilities by training, but there are also many misunderstandings.
A good, and well balanced diet is very important for young athletes to optimize growth and development. During Childhood a foundation for a healthy diet is laid, which helps to prevent chronic diseases at a later age.
The purpose of strength training for cyclists is to increase the power that a cyclist can apply to the pedals during a certain time. Power (Watt) is the result of force on the pedals, and cadence.
Many athletes use all kinds of supplements despite there is little or no evidence that these supplements actually help.
Road cyclists often have long seasons and cover huge distances. The last big races are in October and the first races in the new season start for the professionals in January and the amateurs in March.