Growth, development and physical activity
Physical Education · Key Stage 3 · The School
Growth spurts vary
A GROWTH SPURT is a period of faster height gain. It happens for everyone at some point in adolescence, but WHEN varies a great deal — commonly ages 10 to 14 for girls and 12 to 16 for boys, with plenty of healthy variation on either side. Two people in the same class can be years apart in where they are in this process.
Bones respond to activity now
Bone density built during childhood and the teenage years is harder to build later in life. Weight-bearing activity — running, jumping, games, sports that involve impact — puts a mild, repeated stress on bone that makes it respond by growing denser. This is one reason PE and youth sport matter for health decades later, not just for fitness now.
Coordination develops unevenly too
A rapid growth spurt changes limb length quickly, and coordination can genuinely lag behind for a while — a taller, faster-growing teenager can temporarily look clumsier than before their spurt, not because they got worse but because their body changed shape faster than their coordination adjusted to it.
PUPIL A has already had their main growth spurt: taller, more adult proportions, coordination settling back in. PUPIL B has not started theirs yet: shorter, still child-like proportions, no growth-related coordination changes to adjust to. Watching them play the same game, A may look more capable right now. That is a difference in STAGE, not necessarily in ability — and it is exactly the kind of gap that closes, reverses, or means nothing at all within a couple of years.