There’s this pose that you can do using a yoga belt. It’s like this

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But instead you start out sitting up with your legs slightly apart and bent but feet together. It opens the hips up. As you get used to it, you bring your feet closer to your body. The good thing is you can go at your own pace. 2 minutes a day or 10 minutes a day it doesn’t matter. You can also put blocks or cushions on the outside so your knees have something to rest on. It’s a good gentle stretch before workouts.