In reply to andrew sandercock:
this may help:
start by putting fat bars on them to work your grip.
then, i reckon, it all only really works when done in conjunction with more gymnastic stuff like pull ups, dips etc.
i find asymetric stuff works well: bench pistons, standing pistons, 1 arm over head squats, 1 arm clean and presses etc. basically anything youd do with a bar but with one arm whilst holding the other.
then do a set of pull ups or whatever in between.
my favourite for ice training is something known as a 30/30:
clean and press as many times as you can in 30secs then hold over head for 30secs. 3 sets in a row.
best thing ive found for increasing blood flow to your hands when theyre overhead.
only thing id avoid is doing too much heavy stuff and putting on too much mass - stay as agile as possible.
for every heavy set do a few long sets at 3/4 the weight.
dont train to failure, train to just beyond perfection. get your neurosystem imprinting power precision rather than just blow power.
same for the legs. use weights and your winter boots.