In this respect, here is a graphic presentation, designed to show the proportion of physical qualities in the physical preparation of players aged 13-14, as well as the main means of accomplishing it:
| AGE | PHYSICAL
QUALITY |
% | MAIN MEANS OF ACCOMPLISHMENT |
| General endurance | 25% | Uniform timing runs, low to medium intensity | |
| Specific endurance | 25% | Short intervals, technical – tactical structures, games | |
| General speed | 15% | Speedy runs on different distances (10-15m) | |
| AGE 13 | Specific speed | 15% | Relays, competitions, games |
| General strength | 10% | Programmes for large muscle groups | |
| Specific strength | 10% | Special exercises, competitions, relays, games | |
| General endurance | 20% | Uniform timing runs, low to medium intensity | |
| Specific endurance | 25% | Short intervals, technical – tactical structures, games | |
| AGE 14 | General speed | 10% | Short, speedy runs of 10 – 15m |
| Specific speed | 20% | Relays, competitions, games | |
| General strength | 15% | Muscular training – large muscle groups | |
| Specific strength | 10% | Special exercises, competitions, relays, games |
From the above table we may conclude that the specific forms of physical qualities weigh more than the general ones, contrary to some methodical suggestions for this age that support the prevalence of general and multilateral preparation.
This prevalence of specific qualities is natural, for the basic means of football instruction are now the specific ones.
The parameters of effort, the volume, duration, intensity and complexity must be dosed specifically. The volume of the effort increases as compared to the previous period. It comprises 4-5 training lessons per week and one game.
Within a preparation lesson, the quantity of means is increased, the duration of training is 90 – 120 minutes, with a weekly volume of 500 minutes.
The development of endurance at this age is favoured by the process of growth, modifications of the figure, of weight and the development of the circulatory, breathing systems and that of the muscles.
The growth of the adaptation capacity of the body to effort is recommended, as a basis for improving endurance. The main training means are lengthy runs and short intervals.
Translated by Cristian Sandor