If words of affirmation are their love language, then be frequent with your encouragement, avoiding fluffy flattery and focusing on words that are sincere and heartfelt.
Do you understand how, and why it matters that, your young athlete receives love and encouragement during their youth sport experience? In 2007, Dr. Gary Chapman wrote a book called The Five Love Languages. His premise is that every person has one love language, one that speaks more loudly and deeply to him or her.
The languages are: physical touch, words of affirmation, quality time, giving and receiving gifts, and acts of service. To your child, one of those speaks of your love more clearly than the others. Determining which one will help you communicate support to your young athlete in a way they will truly hear.