The reason you feel gassed after every swim has nothing to do with fitness. It is your kick.

Your legs are the biggest muscles in your body. When you kick wrong, you are burning the most energy possible while generating the least propulsion possible. That is the worst trade in swimming.

The fastest swimmers look like they are floating. That is not talent. That is technique.

Here is what actually makes a fast kick:

Kick from the hips, not the knees. When you bend your knees like a bicycle kick, you shorten the length of your paddle and create drag instead of lift.

Keep your legs long and straight. Toes pointed. The longer your leg line, the more water you move with every kick.

Use your hip flexors. That is the engine. Not your quads, not your calves — your hips connecting your legs to the rest of your body.

The best part? You can drill this on land before you ever get in the water. Lie flat, legs straight, toes pointed. That is your core and hip flexors working together — and when you take it into the pool it clicks immediately.