Feelin' the burn

Yes, I'm feeling it. I'm feeling the burn of the lactic acid in my thigh & hip muscles I never knew I had. The ladies and I from work decided to start a walking regiment and I am moving like a turtle now. WOW! We took the 3 mile trek at the local park and it really didn't seem that long nor that exhausting. However after sitting down last night and relaxing I suppose all that acid built up and when I tried to go to bed, Wham! I was moving slower than my grandma used too. I'm still feeling the burn this morning just not quite as bad. I know it will get better with time. What's that saying "No pain, no gain". Ouch!