The trainer support chat is where you can ask the trainers questions related to your fitness. It is also where we check-in with you every 5-6 days after no contact. Coaches always aim to answer your questions within 24h. You may also ask general question about the site/app.
Program messages are messages dedicated to a single personalised program. They are used to discuss everything related to that training program. Any questions about the program or any requests for change should be directed through this chat, not the Trainer Support Chat.