Wrist pain is due to contact with dumbbells;

Abdominal pain is muscle pain;

You should pay attention to wrist pain, usually joint pain. The incorrect dumbbell posture should be the main reason.

No matter what you do with dumbbells, be sure to keep the back of your hand and your arms on the same plane. Buy a wristband if you can (don't buy a wristband for basketball, buy a wristband for fitness).

In addition, it doesn't rule out that you didn't warm up before exercise.

I hope I can help you.