Hi,
Thanks for your query
for Gaining stiff and slim body you need to gain muscles
we want more information about your current height weight and your lifestyle, food eating habits,
Running will be helpful in many ways, combining running with weight training will be helpful to gain muscle and lean body
Next Steps
kindly book your appointment via practo for further details
Health Tips
Eat small frequent meal, Include nutrient dense options, Include egg, chicken, fish, milk , curd