Make sure that your clothing fits the activity you take part in. Most urban games lateral movement, so that might not be the best to be fit require a pair of jogging shoes. Such shoes are produced by many big brands.
Participation in an urban sport has its own advantages. You must never travel far, to get the sport, because it takes place in your area. Gather a few friends who share the same interests in your area and start practicing. You will notice in the course of time, that to improve your overall fitness through regular exercise.
Once you have more strength and skill, consider joining one of extreme sports. Always play it safe and wear protective clothing, even if you exercise. Never attempt any stunts without the proper protective gear such as helmets, gloves, knee pads, etc.
Extreme sports can mountain biking, stunt bike, stunt - skating, etc. There is no fixed definition for extreme sports. New games are invented every day by young people. You are looking for new challenges, and as long as the activity provides an adrenaline kick, they will try it.
A word of advice - never try to be too ambitious, if taking part in extreme sports. Many extreme activities require a certain degree of strength and skill to perform. If you are just a beginner, be not proud. Start from the basics and build your strength and skill.