Go to the App Store and search and download Nike Training App.
Open the app and create an account.
This is the home screen. Click on the "get workout"section
Hose what you want to do. "Get focused" is the best for targeted results.
Chose what level.
For abs/core choose either the "ab burner" or...
...the "core crunch".
Check out the exercises...
...and begin your workout!!!
- Smart phone!!