HI,
You are feeling weak due to improper breathing,providing you inadequate
oxygen,so you get less energy & weakness.The things you can do to improve ventilation/weakness are,
- Get yourself checked by an asthama specialist for-assessment of your respiratory function, Blood check up for raised eosiniphillia , infection Hg%,
X ray ,
allergy detection & management,
The treatment given after full investigations /physical examination will improve your respiration.
- Avoid things you are allergic to,Get Desensitization treatment.
-Have nutritive diet with ,
proteins,carbohydrates,
vitamins,iron,calcium.
- see you have good digestion .
- Have regular respiratory exercises ( Pranayama),Mild physical exercises to improve your physical & respiratory capacity
Thanks.