As a woman with a height of 178 cm (almost your 180) and under the age of forty, I responsibly declare: if I gain up to 80 kg, it is not what to run, I will hardly walk.
--------
Madam, if with a weight of 80 kg you will REALLY walk with difficulty, it means that with your musculoskeletal system, heart and lungs something is very bad regardless of your weight. If I were you, I would be well examined. For in my 50s, with my 76s at the height of 160 I not only walk fast, long and enjoy walking, without problems climb the stairs with heavy bags, do exercise, but also - imagine - even run a little. I don’t even know how much a healthy person needs to gain in order not to be able to walk. In any case, a young girl with a weight of about 100 at the old job was quite herself.