In your case, the weather. I hope I helped a little. Hi, I'm 16 years old and just recently began bodybuilding. My long term goals are to get as big as possible, as strong as possible, and as ripped as possible. For getting huge and strong, I've read in many bodybuilding magazines that Bodybuilders often switch from their regular routines to powerlifting routines, to develop hard, dense muscle.
Form is more important than weight used.
On the other hand I find the traditional 5x5 sytem a perfect balance between volume and intensity. What I propose is to combine both into a 5x5 powerlifting routine. The problem I have is how should I cycle. I have thought of increasing the poundage monthly by approx 5 lbs or so giving me a yearly improvement of 60lbs or cutting back and building up to a new weight each month. What do you consider the pros and cons of each method.