Single arm inverted row - Best form?

[jetjackson]

Read the form described in the book, but there isn't really a picture of the reach with the hand, with armpit coming up to pulling hand. I've been searching for youtube videos showing the form described, but not having much luck. I'd like to see what good form looks like

So first question would be - knees bent - like in this video? - youtu.be/fHJDaZFCHh8?t=48s

Or legs straight, a bit more like this video - but more at the 30 degree angle described in the book? - youtu.be/bijCMOhRaSg?t=56s 

The picture of Tommy in the book, he kind of has his knees bent, and he is really pushing his right shoulder up towards the ceiling, but not reaching with his hand.

I tried the form with legs together, legs apart, and tried to maintain that plank throughout the movement.

Any links to footage of someone doing it with the form intended in the book? Or, any guidance to get this exercise as climbing specific as possible?

[MarkAnderson]

Unfortunately I'm at work and our web blocker software won't allow me to watch Youtube videos, so I can't comment on your links. I can say that Tommy's form in the book is far from ideal, which is my fault since I was the "director".

Anyway, try to maintain a plank position, but with a twist-lock at the end to extend your free arm as high as possible (as you would if reaching for a hold). Look at the "Advanced 1 Arm Inverted Row" video here: rockclimberstrainingmanual.com/2015/05/27/functional-core-training/ Granted the exercise is slightly different, but the body position and motion is essentially the same. My legs should ideally be straight, but I'm limited by the depth of the roof.

As for legs together/apart, I would say do whatever allows you to maintain balance, but specificity-wise, legs apart is probably more realistic. Notice that one foot (the opposite foot from the active hand) should be supporting most of your weight, while the other foot is essentially flagging. The more you can make it like a climbing move, the better.