Try this arm toning workout that avoids added pressure on the belly tissues where ab separation occurs (aka diastasis recti).
How to Prevent Diastasis Recti (with Crunches) - NASM
Diastsis Recti in Pregnancy and Postpartum - Moms Into Fitness
The 3 Best Exercises to Try for Diastasis Recti - Kaizo Health
Diastasis Recti Safe Ab Exercises - Moms Into Fitness
Diastasis Recti Exercises to Try After Pregnancy
Postpartum Arms And Abs For Diastasis Recti
DIASTASIS RECTI SAFE WORKOUTS
5 Best Diastasis Recti Exercises
Fit Pregnancy, Healing Diastasis Recti, C-Section Wokouts, & Your
Lindsay Brin's CFS Method with Moms Into Fitness : Lindsay Brin, Lindsay Brin, Bill Strohmeier, Edgewater Digital: Movies & TV
Lindsay Brin's CFS Method with Moms Into Fitness
15 Safe Diastasis Recti Postpartum Ab Exercises That Work! - Diary