The main adjustment is to stop relying on the first touch being enough to beat the defender.
Adult full-backs are often better at staying balanced, using the touchline and waiting for you to show the ball. Try to give them a decision before you make yours: threaten outside, pause, come inside to receive, combine with a teammate, or attack after the defender has had to move their feet.
You can still use your pace, but the run is more effective when you have changed the defender's body position first. Also recognise when the 1v1 is creating space for someone else. If the full-back is backing off because they respect your speed, you may already have won something without dribbling past them.
Keep the directness. Add variation around it rather than replacing the strength that got you there.
