Strengthen your core AND raise your heart rate with this 35-Minute Cardio and Ab Workout with Weights. Four cardio and core circuits to strengthen the upper abs and lower abs while burning calories. The best ab-strengthening exercises using weights at home. Build core strength and burn fat with this cardio and ab workout with weights. This workout video is DAY 10 of our SplitStrong 35: FREE 2-Week Workout Program at home with dumbbells!