Im 30, i wake up every morning like i have been hit by a truck, i feel 50 years old, because of all the accumulated injuries and stiffness.
I do 2x strength and 3-5 times bjj. Feel totally stiff most of the day, which is probably a product of bad posture and a sedentary lifestyle for well over a decade.
Trying really hard to get flexible/ loose but it feels like an uphill battle, strengthwise i am much stronger than in my 20's and skillwise i also keep getting better.
Sometimes i begin to question my conditioning, which has never been really good, but i dont really feel much progress in it so it feels like it might be declining, but thats probably between my ears.