Concerns about potential scam email from gym on iPad

As long as you did not enter any financial or personal information including passwords, the worst that can happen is you will get more emails, since it has been determined that the email went to an active account.

I would only be concerned if you got a follow up email that said you won and they need your bank account number to deposit your winnings, or a phone number has been provided to call and they request your account number..

Check with the gym. They can confirm if it’s genuine and if it’s not you’ve alerted them to the fact that they may have been hacked.

you should read

Recognize and avoid social engineering schemes including phishing messages, phony support calls, and other scams - Apple Support

and maybe

Phishing - Wikipedia, den frie encyklopædi