Quote:
You really don't have to go to the gym if you don't have the time. If you want to get 'buff' it is not required for you to go and anywhere or to spend money. I don't have anything against going to the gym but sometimes you just really don't have the time for it. I have one easy training program that I have used to train for the last 6,5 months. It becomes effective after only 1 month, I've gained 7 kg muscle mass by this.
NerDz training program:
Morning pass - 15 push-ups, 50 sit-ups.
After work/school pass - 25 push-ups, 75 sit-ups, 40 - 60 minutes (based on your own time limit) on the bicycle or running and if you have weights at home do some exercises with them.
Before bed pass - 15 push-ups, 50 sit-ups and once again some weight exercises.
Believe me, this works

Hahahaha, it is effective as hell. But for this to work YOU need to follow it and have some self discipline. YOU also need to eat a bit more

I'm very curious as to what weight exercises you were doing. A kilogram of muscle a month is a rather impressive gain with a strict diet and proper weight training. I don't believe you managed to achieve it with pushups, situps, running and haphazard light weight training. I've a feeling your weight measurement was off.
I used to compete at national level in martial arts, and the training for that CERTAINLY exceeded 55 pushups and 175 situps per day, yet I gained no muscle mass from it. Reason being any exercise you can perform for such high reps contributes mostly to capillary and CNS adaptation for endurance, not to muscle gain or hypertrophy. Same reason long-distance runners are typically skinny while sprinters tend to be muscular.