The plank is one of the best exercises for strengthening your core. The Stealth Core Trainer combined with an iOS/Android game gives you the incentive to hold your planks for longer.
Read how the boring unmoving push-up gets a modern-day makeover and makes it a top gift for Fathers Day 2020 according to CNET.
READ MORE HERE: https://cnet.com/news/great-fathers-day-2020-gifts-under-100