The plank is a fantastic exercise for building a stronger core and abs; just as long as it doesn't suck which it often can.

Sample plankbased ab micro workout:
Bear plank (with knees 1" off the ground) for 20s
Lying leg raises 1015 reps
Stretch plank for 1015s
Lying leg raises for 810 reps
Repeat for 34 rounds.

RDP Resources:
Books
Micro Workouts https://amzn.to/37YrzEi

Grind Style Calisthenics https://amzn.to/32TQhQh

Smart Bodyweight Training https://goo.gl/pnJd2b

Overcoming Isometrics https://cutt.ly/CEhHblA

Bodyweight Training for Martial Arts https://cutt.ly/tEhHmDV

Bodyweight Training for Cycling https://amzn.to/2QFlAZm

Fitness Independence https://goo.gl/MTUzDZ

RDP Merch and Books on PDF: https://cutt.ly/qmrtCHp
Equipment:
NOSSK Affordable Suspension Trainers: http://bit.ly/33nlhKq

Duonamic Doorway Pullup Handles: https://bit.ly/3j5gd3D
(Use Promo code “Grindstyle” for 10% off at checkout)

PullUp Dip Equipment https://cutt.ly/kIpxGO8
R.D.P10 for 10% off

WORLDFIT Isometric equipment: https://bit.ly/3mJfbvS

DISCLAIMER: This video and description contain affiliate links, which means that if you click on one of the product links, I’ll receive a small commission. These links help support the Red Delta Project at no extra cost to you.