studies about lumbar support in the office and sort of giving way to the standing desks and the yoga balls that people use. what you need is not so much to worry about whether the upper back touches the chair, but whether -- look where my hand is in her low back, whether you have support in your sacrum and low back because that lifts the spine. >> this is not a great chair for that with no support on the back. >> correct, it's not a good chair at all. correct. this is a good chair for us to show for yoga on the go. >> could you put a pillow back there? >> i would wad up an old sweatshirt in my car and put it in my low back and it makes all the difference. yoga on the go is that alone. >> that's something to take with us anywhere. what's the second pose? >> the second pose is -- we'll do the computer pose again and reaching forward for your tray on the plane. the shoulder goes forward. we are just going to take the shoulders back. she's going to take them from forward to back. what we just did was lifted the spine into a correct posture and now taking the shoulders back. then we'll do the s