Build your strongest core ever with 100 Planks In this edition are: - 100 plank variations with detailed descriptions with common mistakes and corrections- Video tutorial links for every single plank- Over 20 "no crunch" ab workouts- Standing modifications- Advice for weight loss, back pain, shoulder health, and general beginners- Ways to increase your overall core strength, rotational and anti-rotational power, and body awareness to assist in sports...