Physical fitness is a state of health and well-being and, more specifically, the ability to perform aspects of sports
What sports are best for physical fitness?
All sports! It's achieved through proper nutrition, moderate-vigorous physical exercise, and sufficient rest.
Physical fitness also helps with stress.
Fitness culture is a sociocultural phenomenon which refers to the culture surrounding physical activities  
Yes fitness culture is great for meeting new people. 
Physical education, also known as Phys Ed., PE, Gym, or Gym class, and known in many Commonwealth countries as physical training or PT, is an educational course related of maintaining the human body