The oldest saying in the book is that a picture tells a thousand words. This is true if you know what to look for.
So I have added a picture to this blog to help you see where you may be going wrong, and what you need to do to improve your paddling.
So from the imagine above there are many things to see. If we start with the two boxes, red and green. You can see in the red box the shoulders are rotating very well, if you see the green box the bottom half of the trunk is not as well rotated. This will not help getting the maximum amount of power for each stroke. The best shot would show the green box with as much rotation as the red box. This is very common in young paddlers and people of mature age that are not as strong. Now if we look at the yellow circle you can see the closest knee i slightly flatter, that is from the small amount of full body rotation. If the hips were right around in the green box we would be close to seeing no knee in the front leg and the outer leg/knee very high.( that is what we call leg drive )
The blue line is for hand height and this is very good as it helps with full body rotation at this height but more important is that it helps with proper blade placement. To many times I see hands down to low then their blade goes in on the side making them achieve no power from the stroke.
As for this photo the paddler is in a good position to progress well in his paddling, just needs to always be thinking about full rotation on every stroke, by doing this he will feel a lot more boat run with each stroke.
If you would like any help with any areas of your paddling please let me know.