Speed and/or efficiency... take your pick. With a high-elbow catch, both will increase. Without a high-elbow catch, both will decrease. It's that simple.
How to Do It:
1. Through much teaching, we've discovered there are things some people can do, that others can't. In thinking about the catch, it's important you get the feeling of a high elbow position. Here's a simple exercise to see how easy it's going to be for you to achieve a high-elbow catch. If you're unable to do this, you'll know how much you'll have to focus on some of the previous drills, such as Bent-Arm Extension from last week.
2. Extend your arm on the deck, or desk, making sure the arm is extended straight from the shoulder.
3. With your palm flat on the deck, rotate your arm so the elbow is on top of the arm. Then rotate it back down, and repeat.
4. Lift your palm off the deck, and go through the exact same movement, WITHOUT moving the palm.
5. When you imagine how your elbow bends, and the position it's in when extended forward in freestyle, if the elbow is on the BOTTOM of the arm, there is a tendency that it will lead the catch, and you'll miss the early part of your pull.