Dumbbells and kettlebells are a great way to amp up any routine, but they’re not the only weights at the gym. If you’ve never picked up a medicine ball, there’s no better time than now.

The sandbag-meets-basketball is perfect for core training since it allows you to easily move and balance the weight in ways dumbbells may not. Best of all, medicine balls come in different weights and sizes (we’re using a six-pound ball from SKLZ in our shoot), so even if you’re new to working out, there’s one to suit you.

Source: Core Exercises: 10 Medicine Ball Moves for Strong Abs | Greatist