Yes it really can drain you...i've been trying energy movement tech niques from new energy ways and man i've never had such a heavy feeling...i experieneced sensations i only felt when vivsting a healer...spasms around the nbase chakra and poweverful waves of energy...i am trying not get confused betwenn by energy and a neg sensation...and yes having done it for 45 minutes i feel pretty drained..go get some fresh air and do somthing grounding like playing frizbee..