Dude u need to understand why you get shinbang. If you're landing backseat it may be shinsplints rather than shinbang (excruciating tightness down the front and side of your shins - hurts to walk long strides in normal shoes or to run on) - this is what most people end up suffering from.
What causes it:
In simple terms its over-stretching / over straining the muscles and tendons in the lower part of your leg. The most common way this happens with backseat landings is much the same as when runners get it from taking too longer strides - its massive force coming down on the back of your heel and your foot then slapping forward and pulling the rest of your body with it. Aggravating factors can be weakness or over-pronation of the ankle joint, existing muscle imbalance in the leg, not warming up and badly fitted ski boots.
How to fix it:
First try and figure out the cause - usually its a combination of the above. Backseat landings if you hammer them all day will always give you a bit of shinbang, but you can minimise it. Some suggestions about how you might be able to sort it:
1. Make sure your foot is properly supported in the ski boot - get some custom moulded footbeds with a stiff heel stabiliser. Any good ski shop should be able to do this for you - ask for DD Foam or a Crystair stabiliser to be used. What this does is stabilise your foot in the boot so your ankle cannot move and your foot doesnt compress, flatten out or roll inward when it has pressure applied to it - these movements are very subtle when your skiing and you probably will not notice them (other than pressure and tightness near your little toe or on the inside of your ankle) - however they make a massive difference - once your foot is stabilised.
2. Consider using a heel lift - this is a small gel pad that sits under the heel of your footbed inside the ski boot. What it does is to reduce the volume of the fit, put your ankle in a higher position (which can often help people who experience shin pressure points and difficulty flexing their boots) and tip you forward slightly. I personally found using heel lifts really helped get rid of pressure points on my shins.
3. Check your ski boots are the right size length wise... take the liner out and put your foot into the shell, sliding it forward until your big toe is just touching the front. For a solid fit you are looking to have between 10 - 18mm behind your heel. Roughly speaking if you cross your index and middle finger you should be able to slide it down the back of the shell between your Achilles and the shell. If you are able to do this and wiggle it around loads too chances are your boots are too big for you. It's important when buying boots to go for a boot that is the right shape for your foot, e.g. full tilts work best for people who have a comparatively narrow and flat foot with a mid-sized ankle. Conversely salomon SPK's have much more width in the forefoot, whilst Nordica Ace of Spades have higher instep volume etc etc. Basically getting the right boot for your foot shape is half the battle.
4. Tigerbalm the fuck out of your shins a lot. Also ice them to help reduce the inflammation. It helps.
5. Stretch and strengthen - one of the main things is this. Probably one of the best exercises that helped me is to stand on a step with just the balls of your feet on the step (i.e. with the rest of your foot, heel etc overhanging). Sink down until your heels are as far below the height of the step as you can manage and stay balanced, then go up on tip-toes, and repeat a bunch. you can either repeat it as a strengthening exercise or hold it in low and high positions as a stretch.
6. Go easy on ur shins - when it starts to give you gripe then chill for the day and take it easy. Don't push it as the more you get them inflamed the longer they will take to recover.
Hope this helps.
