前鋸筋

https://gyazo.com/1b9e59276d9acf3ebb6f11e67d85e575

https://www.youtube.com/watch?v=ISj27xJ5oR4&t=1267s&pp=0gcJCdkKAYcqIYzv

https://www.youtube.com/shorts/pam6fZm4Ii8

https://www.youtube.com/shorts/QTDNcLpkqnM

https://www.youtube.com/watch?v=2dewNiBOBKs