The Stealth Core Trainer combines the excellent planking device with an iphone as well as Android phone application to gamify your core job out. Does it function?
See it on Amazon: https://amzn.to/2LFvRlW
The owner of this website, Bryant and Paula Harper, is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking http://buzzjeet.com to Amazon properties including, but not limited to, amazon.com, endless.com, myhabit.com, smallparts.com, or amazonwireless.com. Copyright (C) 2018