Tabata 20: on :15 off 8 rounds each *stay on one movement a full 8 rounds before switching 1. hollow hold with alternating knees to chest (slow slow slow movements ) https://youtube.com/shorts/0I5YWnGI89w?si=eYusamUQGd1amm16 2. Fast Russian twists (heels off ground , lean back and full the tension in core ) https://youtube.com/shorts/iFQV6q4xRXM?si=rflkOZ6_Xd0uOU4s 3. alternating plank positions- no rest this round hold each plank full 30 seconds (high plank, side plank left,right , elbow plank , repeat. )