Your channeling sessions do seem very psychical. You are constantly moving, spinning as it were. Maybe you should incorporate some yoga into your meditation to stretch and limber up.Diet and fluid intake are important too. A toxic free environment is helpful, kick the smokers out (If you haven't already)
Then there is the reality of the space you are in is it in chaos? This too affects you physically.the chaos around is like your computers that have lots of little programs running in the background if you have too many running it just slows the whole process down. We acquire stuff and when we have it it just sits there.Many efficiency experts talk about a clean desk a clean mind this will help you focus ( Here is an interesting blogg http://zenhabits.net/lil/
peace

Smiling and deep, slow breathing through the nose can really save and strengthen personal energy.

Love and Light

In your case, meditation would be a great help. Since you have company along to drain from you, quieting your thoughts will charge your inner self. Also, the sun, (use sunscreen if long periods), sitting in the sun with your eyes closed will give you a great boost but don't overdo it. Next, expand your personal bubble into the earth, the trees, the wind and know that you are connected to this nature self along with deep breathing in through your nose, out through your mouth.

P.S. Try to channel yourself to a writing pad or record yourself and do some self editing. It is annoying, you don't have to prove anything here. Many of us have that talent too.

Make sure you are eating a diet that matches your needs. Which will include chemical free food and organic as possible. With that make sure you are exercising more calories than you are taking in. Get at least eight hours of sleep, plenty of water and meditate 20-30 minutes a day.

You should be fine.

Any medical conditions, please see a doctor.

I would suggest doing a resistance training workout 3 times per week. Although your channeling experience involves a constant movement, it is not weight bearing. I am sure you work up quite a sweat, so you must replace the water and electrolites. I don't suggest sports drinks, unless you get an all natural, organic variety. Drink water before your session and after. Not too much at once just before, but an eight ounce glass sipped slowly every 30-60 minutes before your session should help prepare you. I do not eat before my workouts, but afterward. After I work out, I take L glutamine and then eat breakfast. L glutamine is an amino acid and helps with recovery. Make sure you are getting enough complete protein as well and lots of fressh vegetables and some fresh fruit. Without knowing what you are eating, it's hard to modify it. I think you should grow your own sprouts and eat them every day.