sit-up assist devices.

These are compact, portable fitness tools designed for core exercises at home or in the office. 

• Function: They help users perform exercises like sit-ups, crunches, and leg raises by securely holding their feet in place. 
• Design: They feature a strong rubber suction base that anchors securely to smooth, flat floors. 
• Features: The height is often adjustable to fit different foot sizes, and they have soft, padded foam handles for comfort. Some variations, like those pictured, also include resistance bands for additional full-body workouts.