My four week project: Cardio training to get in good shape

Cardio training is extremly important to avoid getting counteract diseases. Medical studies show that poor persistence is linked to so many lifestyle diseases that I absolutely would recommend cardio exercise almost every time you're at the gym.
This is my story about how long I went from having miserable condition to get in great shape - in only four weeks.

Week 1: Lousy form.
My doctor visit was essentially as expected. He told me that I had trained strength too much and that I needed to start running. "You can look like s*** inside your body even though you have large and visible muscles on the outside", quote my Danish doctor.
He begged me that I had to start cardio training and stop bulking immediately.

Progression: 0%.

Week 2: Start.
After four training sessions, where I jogged at all (both before and after the heavy lifting), I began to notice that I had better fitness and was in better shape than before. I was definitely on the right path and could feel it.
Progression: 10-15%

Week 3: Decrease in body fat and muscle recovery.
Now the results began to really notice that I started with cardio training. In addition to the fat percentage went down and muscles (especially abdominal muscles) was more visible - it was much harder to get larger muscles than before.
I started on a little heavier gainer to compensate for muscle loss. I was refusing to go down considerably in weight just because my doctor had said that I had to take a run sometimes.

But I absolutely saw some progression on my body, which really motivated me to continue the cardio training.
Progression: 40%

Week 4: Normalization.
Finally, I felt that I started to normalize my routine. Decided that I get every second time at the gym would run at the threadmill- not every single time. With a steady progression I realized that I got closer and closer to the  "Cristiano Ronaldo" body, which has been the goal all along.
That said, I am still training to increase in weight. But I agree with the doctor's advice that not focusing on cardio is the stupidest thing you can do if you want a great body.

Progression: 70-80% - still have some things to do, but I feel that I will look great to the summer season (2-3 months left). I have also learned that cardio training among with heavy weight lifting are the best ways to get a good body - and I will recommend all to mix those two training forms.
Conclusion

In the conclusion I would like to highlight a few things:
- Your body does not necessarily good inside even if it does on the outside.- It takes about three weeks to get a normal / good condition if you train it 1-2 times a week. (6 times of intense running is enough)- You lose some muscle to train cardio. Eat twice as much - or buy yourself a good gainer.