Adolescence and youth
Between thirteen and twenty, three factors converge that will never coincide again: a body gaining strength every season, reflexes at their biological peak, and training time that, for anyone competing, can exceed ten hours a week. It is the window in which fast equipment stops being a handicap and starts being a real tool. But it does not open all at once on the player's thirteenth birthday, nor does it open the same way for everyone. What changes is the ceiling; the floor remains the same principle: equipment is chosen for the player one demonstrably is, not for the one it is hoped they will become.
The transition from junior equipment. Section 17.1 ended with a bat of 140-160 grams, an all-wood allround blade, thin soft rubbers. The jump is not made in one go. What works is a staged change that follows the physical and technical growth. The first step is usually to increase the sponge thickness — from 1.8 mm to 2.0 mm — without changing the blade, so the player notices more response without losing the touch already acquired. The second, when arm speed justifies it, is to move to a mid-range tensor that introduces some catapult effect — described in 2.4. The third, if progress continues and the coach endorses it, is to change the blade to an offensive one or to one with inner composite — the differences are in 10.3. Each step is held for several months before the next: the body needs time to integrate the new responses into motor memory.
Blade and rubbers. The range opens up. The offensive all-wood five-ply remains solid for the developing player, because it maintains the sensory feedback learning needs. An inner carbon blade comes into play when the player trains regularly and has consolidated the loop drive, the active block and the loaded serve; outer carbon is justified only with high arm speed and a mature stroke. The practical rule: inner forgives and teaches, outer demands and rewards. In rubbers, an adolescent training three or more times a week can sustain medium-high tensors on maximum-thickness sponge of medium hardness — between 42 and 47 degrees ESN, with the caution about comparability between makers set out in Annex A. Anyone training less benefits from staying a step below: a mid-range tensor, medium sponge, soft-to-medium hardness. Chinese rubbers with a tacky topsheet — 5.3 — appear at this stage for the player oriented towards the Chinese style, normally under the supervision of a coach who knows their demands of activation and boosting — chapter 14.
The assembled weight. The adolescent body tolerates what the child's could not and the veteran will no longer want. An assembly of 170-185 grams is usual, and stronger players can reach 190 if the stroke justifies it. It remains essential to weigh the assembled bat and check that the arm sustains it through a full match, not only through the warm-up. Section 11.5 develops this variable in detail.
The error of this age. In this band the risk is not mounting equipment “to grow into” — that was 17.1 — but jumping too quickly to competition equipment because the physique allows it even though the technique does not support it. An adolescent with good arm speed can activate a hard tensor and produce impressive balls, but if the technique is not consolidated, the equipment masks the shortcomings: the loop comes off fast without directional control, the block escapes through the catapult, the short game turns clumsy. A coach who slows the progression of equipment is not limiting the player: they are protecting their technical development. Section 15.2 covers the difference between perceived and real level; here that difference is amplified, because the adolescent's physical confidence is mistaken for technical maturity, which needs more time.
Adolescence is the phase in which the equipment decisions that will define the adult style are taken. A player who by eighteen has been through two or three progressive set-ups, accompanied by training and honest diagnosis, reaches adulthood — 17.3 — with a knowledge of their own game that no catalogue replaces.