I went about a week without training and found my pull up reps per set went down from 7 to 4 or 5. I have retained my reps for every other exercise. However, strangely enough my form seems to have improved for every exercise including pull ups. I was wondering how such breaks actually effect strength and endurance. How long a break can a person take from training without losing progress? Are such breaks helpful in any way? Any opinions are greatly appreciated.