Here is a little ab routine you can do using 1 dumbbell.
Except for that first move…….
1- runner lunge TO a knee tuck or Pike. Repeat.
2- DB Full Sit Up Extension
3- DB Toe Touches
4- Russian Twist w/ a shoulder press
4 Exercises/ 4 Rounds/ 30 Seconds Each OR 15 reps.
Watch the Video Here: