Security Analyst

Software Engineer

Keto/paleo : 2-3 months 
 Intermittent fasting(14+ hrs) : 6-7months  
  
 Excersise / calorie deficit / HIT - intense take 6-7 months ; casual you may never achieve that goal.

Program Manager

4-5 months if you do - strength training and calorie deficit food intake. 
  
 Much slower with just focusing on cardio.

Product Manager

20 weeks at 1kg/week tracking. It is possible if you go calorie deficit

Recruiter

Personal experience - about 1 year. Mix of healthy eating, no alcohol, 5 times a week gym. 
  
 Didn’t find a need to be super aggressive to do in 3-4 months. Calories deficit makes you grumpy+need energy for day job.  
  
 But you do you….

Strategy & Operations

I took 3 months exact with strict diet and Gym for 6 days/week

With a strict diet and aggressive workout, you can drop 1kg per week, but after 2 -3 months you won’t be able to see such a drop in your body weight. So, I believe it would take 9–12 months for a person with a good metabolism.

How long will it take to drop 20 kgs?