Is it normal to feel 60 at 28?

I work at a pretty stable MNC with decent WLB and we don't even have those toxic 80-hour weeks but my body is just completely giving up on me lately. I literally sit in an AC room all day doing nothing physically exhausting, yet I wake up every morning feeling like I got hit by a truck and need hours just to function. My lower back is constantly screaming and I have absolute zero energy left by the time I log off from work. Idk if it's the sedentary lifestyle catching up or our generation is just built weak, but bhai I used to play sports for hours and now just sitting in an ergonomic chair makes my joints pop. Anyone else dealing with this or do I seriously need to get my blood work done?