1. She was beaming. (= she had a big, radiant smile) 2. The kids were smiling from ear to ear. 3. He looked puzzled. (= confused) 4. She grinned. (= had a small smile) 5. He winced when the doctor gave him an injection. (= had a quick expression of pain) 6. She gave me a dirty look. (= looked at me angrily) 7. She blushed. (= her face turned red because she was embarrassed) 8. His eyes were glazed over. (= he appeared 9. Why the long face? (an informal expression to ask why someone looks sad or upset) 10. Her expression was unreadable. (= you can't know what she is feeling)
If communal changing rooms make you feel anxious, put on exercise gear beneath regular clothes before you go or choose sessions at a quiet time of day. Do a tour of all the local sports centers to find a place where you feel comfortable. As you become more addicted to the endorphin high that follows a good exercise session you might feel less concerned.