Practice; Practice; Practice
Practice does make perfect and being repetitive and training regularly will make you stronger and better. Arm wrestling uses unique, specific muscles, ligaments and tendons and the only way to make them stronger is to practice the move you want to get stronger at.
Know Your Opponent
"If you know the enemy and know yourself, you need not fear the result of a hundred battles. If you know yourself but not the enemy, for every victory gained you will also suffer a defeat. If you know neither the enemy nor yourself, you will succumb in every battle." ~ Sun Tzu
To be competitive and a champion, before each match determine who you will be against by looking at the draw sheets. Watch this individual compete against other individuals and observe his technique. Expose your opponents weakness and do the opposite of what he does and is strongest at.

Know and practice the “Four Moves To Win”
1. Top roll, 2. Hook, 3. Cupping with Side Pressure, 4. Dragging Straight Down. Regardless of what move you use, gap your opponent and pull him away from his chest and towards you.
I talk about the four moves to win in my videos.
Consider Taking A Foul To Win Or Prevent A Loss
To be strategic, it may be beneficial to take a foul to prevent a loss or to win. There are two ways to take a foul; both are designed to be aggressive and dominant.
1 Starting early. This is a foul but is advantageous because you will be faster, dominant and this will get into your opponents head as being better. The penalty for starting early is worth the risk.
2 Moving your elbow off the pad. If you know you are starting to lose, you can move your elbow off the pad to either have the match stopped or move your elbow up to gain leverage and the advantage to win. If you are starting to lose, you must move your elbow off the pad in a non-losing position (within 45 degrees of verticle).
How To Position Yourself At The Table
Keep your shoulder behind your hand so you can use your body to assist in pushing your arm. Keep your hips close to the table and as high as possible because power comes from the hips. Move your hips in the same direction as your arm - sI explain this in my videos.
