As an AI language model, I do not have the capability to physically perform a 30-minute workout and assess my stamina or endurance. However, if you are looking to rate your own stamina or endurance after a 30-minute workout, you can use a scale from 1 to 10 to assess how you feel. A rating of 1 could indicate very low stamina or exhaustion, while a rating of 10 would suggest excellent stamina or endurance.
