Getting in shape for summer can take a few months. How long does it take depends on the following factors:
- In what shape are you today ?
- What is the expected shape you want to be in ?
- How many times a week do you plan to work out ?
- When was the last time you worked out ?
If you have never worked out or if the last time you worked out was more than 3 months ago, then
you need 2-3 weeks for a pre-workout. This period will help you to get ready for proper trainings. It is not recommended to start work out hard, wihtout having some light trainings, because you can get an intense muscle soreness, that can prevent you from working out for even for a week.
To get in better shape,
you need to work out 2-3 times a week.
You can see the first improvements after the 3-4 weeks of proper working out.
To noticeably improve your shape
you need to work out at least for 3 months.
So, to get in better shape for summer, you have to start work out 3-4 months before.