Obviously we need to look at the model or subject to sketch, but I'd like to impress that we are impressionists and not realists when it comes to our sketches.
Looking up and down TOO much can lead to disconnected shapes.
We concentrate on a head, a torso, a leg or any part individually and forget about the gesture as a whole. The truest example of this is when the time is up and the model has moved and we only have a partial sketches done.
What I believe is happening is the brain is trying to capture shapes of the body in segmented thinking because we worry about the correct shapes of anatomy and it bogs us down. We should be starting with large shapes that cover the whole pose first then work over that trajectory with more detailed work.
Remember the gesture is the whole complete idea of a pose. It's not a gesture of an arm then a gesture of a body, then the legs. It's everything in one!
My advice is to record a complete mental picture into your mind by studying the model or subject for a moment. Then go down to the paper and draw until you've forgotten that mental pic and go up for more info. This will help you draw your impression of the whole pose and not get caught up in segmented sketching.
I was at my son's first Tball game yesterday and sketched a few pieces. It was so rewarding to experience such young kids playing America's oldest past time.
|Coaching the batter|
|Paying attention to the game|