Junior player development (U16-U18)

Players in the U16 to U18 age groups are growing faster than their tendons can keep up with, so the job is to build a broad athlete first and let the rugby specialism arrive late. What follows is what to train in each age group, how to pull the load back through a growth spurt, the signs that a junior is doing too much, and what picking a kid's position early costs you later.

What makes junior training different

A player in the U16 age group is not a small adult on a smaller pitch. Bone lengthens ahead of the tendon that has to pull on it, so a kid who was well coordinated in March can look clumsy by June, and the same kid is under enough selection pressure that hiding a sore knee starts to look like the sensible move. Coaching that band well means spending the season on the player who will still be here at twenty-two rather than on the one who wins you the next fixture.

What to focus on at each age

Age	Physical focus	Technical focus	What to avoid
U16 (14-15)	Movement quality, bodyweight strength, speed mechanics, flexibility	All positions, broad skills (pass, kick, tackle, catch), game understanding	Heavy lifting, rigid position specialisation, adult training programmes
U17 (15-16)	Introduce barbell training (technique-first), develop aerobic base, plyometric progression	Positional awareness (not lock-in), set piece basics, decision-making	Maximal loads, excessive contact in training, volume spikes
U18 (16-17)	Progressive strength training, energy system development, sport-specific power	Position refinement (still play 2-3), advanced tactical understanding, leadership	Adult periodisation models, training through growth pain, ignoring fatigue

Sample training week (U17)

Day	Session	Duration	Notes
Monday	Gym: learn to lift	45 min	Squat, hinge, push, pull patterns with light loads. Technique is the goal.
Tuesday	Team rugby training	75 min	Skills-heavy, limited contact drills
Wednesday	Other sport or active play	60 min	Touch rugby, basketball, swimming, whatever they enjoy
Thursday	Speed + agility	40 min	Sprint mechanics, change of direction, short efforts with full recovery
Friday	Gym: bodyweight + core	30 min	Push-ups, pull-ups, planks, single-leg work, mobility
Saturday	Match	60-70 min	-
Sunday	Full rest	-	Sleep, eat, recover

Signs a junior player is doing too much

Persistent joint pain (especially knees, heels, lower back)
Declining performance despite consistent training
Loss of interest in rugby or training
Frequent illness (more than 2-3 colds per season)
Mood changes, anxiety about selection, sleep problems
Growth plate pain that worsens with training