You can change your Nike+ account settings by logging into your account on Nikeplus.com and clicking the drop-down menu located next to your account name in the upper right corner.
Select "Account Settings" in the drop-down menu to change your profile picture, screen name, email address, password, date of birth, gender, height and weight, distance preference (miles or kilometers), country, state, city and zip code.
Once finished, click "Save". You can also deactivate your Nike+ account from Account Settings.
Use the tabs on the left side of the Account Settings page to change privacy preferences, addresses, social media sharing, and notification preferences.
You can also edit some Nike+ account settings (height and weight) through Nike+ Connect if you use the Nike+ FuelBand, Nike+ SportWatch GPS or Nike+ SportBand.
Simply plug the device into your computer to launch Nike+ Connect, click "Settings" on Nike+ Connect and change the settings by selecting the available tabs on the left.
You can access Nike + iPod settings directly through the iPhone/iPod touch device settings or on the iPod nano.
If you use the Nike+ Running App, change the app settings by tapping the "Menu" icon in the upper right corner and selecting "Settings".