Bent-knee plank - Fit People

Tricep dips, knees bent - Fit People

Leg lifts, knees bent - Fit People

Forearm plank - Fit People

Lateral plank resting on forearms - Fit People

Push-up plank - Fit People

Reverse plank - Fit People

Balance plank - Fit People

Push-up plank - Fit People

Side plank with legs stretched out - Fit People

Double knee jump - Fit People

Pointer, knees on floor - Fit People

Diamond push-ups, hands at knee height - Fit People

Knee lifts - Fit People

Bear crawl - Fit People

Count to 4 - Fit People

Isometric floor bridge - Fit People

Lateral row with light weights - Fit People

Arm bounces, palms up - Fit People

Backward lunges, arms over head - Fit People

Cobra push-up, two way - Fit People