Engage a trainer at the gym for a few weeks so that this person can see you are getting professional help and ensure correct workout form.
When approached for advice, you can say thank you but mention you are following the lessons from your instructor. This helps keep things polite.
Put on headphones and play music while working out. This will create a barrier that minimizes the chances of receiving unsolicited advice.
Maintain a balance by letting your teenage daughter manage her commitments while being available for guidance, ensuring she learns the meaning of commitment.
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