Wow interesting...especially the 2nd one - imagining the light coming from pelvic area...I'm no yogi or anything like that but I've traveled a bit and during my stay in Dharamsala, I've taken a meditation course...and exactly this rooting technique was used after the session to "get back to the body"...

Also the first one, for me, I don't usually sit etc but Im barefoot during my garden workout...and I feel it works already...it's crazy that we're wearing shoes from syntetic stuff which completely separate us from our mother earth...before, people used a real leather for shoes, which doesn't isolate electrical impulses etc...but nowadays, dunno...it's jst fucked up kind of...people don't have neither enough sun, nor the connection to the ground...