I have been in training for a few years now and have added 2 inches to my arms, making them 16 inches.

Since July I have not been able to add any size to my arms. I took the past two weeks off, except for a few minor workouts, but I started back in training today. After several hours I measured my arms and they only measured 15 ½ inches.

Please advice me on how to avoid such long slumps, and is that normal to lose one-half inch after 2 weeks off?

To bring your arms up fast (two weeks) try my shock routine as follows:

Perform alternate DB Curls from 25 lbs. up the rack (in 5 lb. jumps) to the highest weight you can use and then turn around and come down the rack to the lowest weight you can still feel a pump from!

Four reps only per set, and shake arms and hyperventilate two breaths between sets!!!

Also, carry some liver tabs around with you and take three every 2-3 hours for 72 hours.

This is the reason you are not pumping, you do not have enough first-class protein in your bloodstream.