This service is similar to the system components that enable other forms of wireless connectivity on your phone (ie. WiFi, NFC) and will not run or use system resources unless you start an app that requires ANT wireless communication. It is pre-installed by your device manufacturer to allow the built-in ANT wireless hardware already present in your mobile device to operate. If you do not intend to use this feature there will be no impact to your system and no further action is required.
If this service is not pre-installed on your phone you may still be able to enable ANT+ communication, see http://www.thisisant.com/developer/ant/ant-in-android/ for more info.
What is ANT?
ANT is an extremely power efficient wireless communication technology.