Paddling Tips
Practice getting in and out, and make sure to sit all the way back in your seat with your knees slightly bent, and resting firmly against the sides. This gives you better control and helps you avoid lower-back strain.
For better efficiency, use your whole torso as well as your arms, (in other words, put your back into it), and maintain a relaxed but firm grip on your paddles, no need for a death grip!