When will the aching stop?

I've been working out non-stop for roughly a year.  Before then, my workouts consisted of an aerobic class here, a yoga class there, pole dancing to spice it up and kick boxing, just to throw in a little variety.  Nothing ever stuck.  But once I turned my life over to complete fitness and decided I needed to workout on a more consistent basis, I hired a trainer and got serious.  At that time, I didn't have enough motivation to workout myself, so getting a trainer seemed to be the most logical thing to do.  I knew my body would ache for awhile because I was just starting out and my trainer felt I could take it because of my boyish frame and athletic build (giggle).  There would be days where my arms wouldn't move.  They would lock at the joints and my muscles were extremely tight.  Other days my legs were weak as water and I had a hitch in my giddy-up.  It literally felt like my body ached from my eye lids to my toenails.  As the weeks went by and my body became more susceptible to the workouts, the aches and pains gradually wore off.

Now that I'm in fitness modeling, the workouts are more grueling, intense and rigorous.  The days where my arms were unmovable and I wreaked of Tiger Balm were upon me once again.  I couldn't figure it out.  I thought since I was becoming more fit and active that I wouldn't have to feel as much pain as I did when I first began working out.  But I realized that I've only been doing this a year and the weights my trainer put on me were increasing. Nonetheless, Tiger Balm is readily by my bedside and I stay soaking in a hot bath on those particular days. 

I couldn't help but think, so this is what it's like to be an athlete? It hurts like hell but I guess if I'm going to be a part of this life the aching won't stop for a while.  I think I can get used to that.  It hurts so good, but I would never tell my trainer...