How a person compains in Enghish?. ¡¡¡¡¡¡¡¡¡Ayyyyyyyyy!!!!!!!!!

Hello.This week I started my pilates classes. I'm going two days a week. The class lasts an hour.
My god!.
¡ Qué agujetas tengo! How do you say?
My whole body aches, especially the abdominal muscles.
I'm rusty but I'm taking oil to oxidace not me.
Do you think it will work?

You could say "my muscles are sore," or "I'm sore all over." "My whole body aches," as you wrote above, is also correct. Aches, though, are more to do with age or illness. Sore muscles are usually what you get from exercise.