I just managed to lock my knees for the first time in standing seperate leg in practice yesterday, and felt a sharp pain in my left tendon behind my knee. This morning i’ve woken up with some pain in my knee cap. I’m going back tonight and hope that some advil will help me through this one, and it’s just a tight tendon and will loosen up. Is this normal for someone who’s only been practacing for about 3 weeks or so?