Why Do I Ache So Much After Gym Why Do My Shoulder And Arm Muscles Ache So Much After Going To The Gym?

Why do my shoulder and arm muscles ache so much after going to the gym? - why do i ache so much after gym

Ive been going for 2 weeks to go 4 times per week. I am 40 minutes cardio and 20 minutes a higher weight. Is that correct?