This question varies from person to person. Not every girl likes muscles and fitness. You can talk to her about their hobbies first. If a girl likes fitness, you can discuss it with her. Of course, if she is interested, you can show it to her. On the other hand, some girls don't like sports and fitness. If you show it to her rashly, on the one hand, you won't get the expectation you want, on the other hand, it will make girls feel that you are showing off and may even reduce your goodwill. So, let's first understand what the tone is doing. I wish you a successful blind date!