Here is a fitness accessory that lets you perform core and hamstring/glute training anywhere. The Vikingstrength Nordic Hamstring Curl Strap has a velcro design and makes switching between exercises easy. It comes with 4 anchor points to distribute pressure more evenly.
A free app is available for this kit that shows you how to get the most out of it. It has premade workouts and over 750 exercises for you to choose from.