need some help on axe kick

[NinjaCloud]

The axe kick, is that sort of like the outward and inward downward kicks of ITF TKD?

[markusan]

Just a hint to help develop speed and power in your axe kick. Sit your heel with leg extended on a training partner's shoulder and push down as hard as you can for six or seven seconds, practice that a few times, maybe five or six times to statr with. It will strengthen the muscles involved and give you a feeling of the downward push you need to breack the boards. If you want to gain flexibility for the same kick get your partner to lift your leg slightly before you push down so you are always starting from a slightly uncomfortably stretched position. The trick to breaking is to hit it hard as you can, hit through the board and don't think!

[Ironberg]

You can achieve the same effect by doing the front splits, and "pinching" the floor with your heel. You can also achieve this by falling into the front splits slowely without touching the floor with your hands.

[CloudDragon]

the biggest problem I have seen is that people don't bring the foot up high enough. Remember, when you change direction at the apex of the kick you lose the speed needed for a good break. That is when you need the height to help with the acceleration for the speed to break. A foot has enough weight and mass to break a board, you just have to supply the speed.