I myself have trouble with middle splits. Try using some kind of flex ベルト または stretch band または whatever あなた want to call it. Those kinds of belts/bands are suppose to help with splits I don't have one but I will. I don't know what store they are in but just get one however あなた can. In stores, on line, doesn't matter. If あなた already have one, that's great and I must've 発言しました this for nothing. Anyway, good luck
