From: Impact of professional, recreational and nonsinging on temporomandibular disorders - a comparative study based on a self-assessment questionnaire
Physical activity
Professional singers
Recreational singers
Nonsingers
Inactive
13.5
12.5
2.1
Up to 2Â h per week
21.9
18.8
Up to 5Â h per week
32.3
41.7
37.5
From 5Â h per week
24