13 Best Facial Exercises To Make Your Face Look Thinner

https://onlinelibrary.wiley.com/doi/full/10.1111/jocd.12745

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6432900/

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5784581/

https://www.researchgate.net/publication/292343296_Effect_of_neck_flexion_restriction_on_sternocleidomastoid_and_abdominal_muscle_activity_during_curl-up_exercises

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5893462/