Wisdom Teachings - Sat Yoga, Costa Rica

Student Question: Sometimes when I meditate I feel a kind or rush that feels like adrenaline. It feels very good and I want to go deeper into it. The problem is that it feels like I am holding my breath, and I am making this huge effort in order to go deeper. It only lasts for some time and then I feel exhausted. What should I do when this happens? Just let go?