Yes, it happened this week. With my biceps. Let me explain.
My workout regime is very mathematical. To find out my run speed on the treadmill or how much weight I am to use, first I take the number week of the year. This week is the 13th week of the year. So the number for this week is 13.
To find my run speed, I take the number of the week and add 30. Then I put a decimal point in the middle. So the treadmill speed for this week is 4.3 (13+30=43, put a decimal point in and you get 4.3). And I stay on the treadmill for 30 minutes each time.
With the weights, there are three categories: light, medium, and heavy. To find my light weight, I take the number of the week and add 10. So my light weight for this week is 23 (13+10=23).
To find my medium weight, I take my light weight and double it. So my medium weight for this week is 46 (23 x 2=46).
To find my heavy weight, I take my medium weight and double it. So my heavy weight for this week is 92 (46 x 2=92).
I do 15 reps on each machine.
The hardest weight machine for me has been the bicep curl. Since day one, this machine has been the hardest. When I first started working out, during week one, the weight I tried curling was only 10 pounds and I still couldn't do 15 reps. Now the weight is at 22.5 (that's the closest to 23 pounds it goes) and before this week I have been able to do 15 reps, but this week I stopped at 12. That was yesterday. Today I did it again and bumped it up to 13 reps. This means I'm making progress! YAY!
Oh and I've lost four pounds so far. I'm at 161 now. Double-YAY! I rule!