is doing certain stretching of yoga haram?

I know that doing yoga is haram as it is part of Hinduism. But what about doing certain stretching that matches with some yoga stretching. I follow a stretching routine that has some yoga stretches like **downward facing dog** - You kind of need to bend your body like a dog. **Dynamic Frog pose** - Be in a frog position. **is doing those haram?** Note that i am not doing yoga. Just a stretching routine to stretch my legs.