Q: In my weight training i do 12 rep then 10 with more kgs then 8 then 6 with failure.In some exercises that goes 12,10 and then 6(instead of 8).I wanna do 4 sets.What would u recommend for the forth set?Should i go for 12,10,6 and one more time 6 reps?I wanna get the best possible results.

A: It really doesn't matter. As long as you are lifting heavy enough that you reach failure in under 12 reps you can vary the exact number of reps in a set however you like. In fact, it's a good idea to vary it instead of just always doing, say, 10 reps per set. So 12+10+6+4 is OK or you can take longer time to rest after second and third sets and then you'll be able to do 12+10+9+8. Either one is fine and mixing them up every which way will give you best results over time.