physical preparations are very important when going on adventures. This is a recommended program used extensively in wonderland;)

legs and hips are important to prepare, either by running on stairs or going for trial walks with an almost full backpack...
Svimming is a great alternative and the balancing board is great for strengthening the finer balancing muscles around the ankles and kness

situps front, sideways, the crocodille and the legups....well it needs no introduction i believe

backcurls sideways and pappabuuu(pappabuuu is swimming like a dolfin which will excesise the lower back and the abdorminal region. You strech your arm out in from of you and then "wave" with the legs and back, and upperbody)

pushups and other upperbody stuff

it is a good idea to do pushups when going on a trek. The best way is to do them as slow as possible since this will not only train the larger muscles in the arm but also do wonders for the finer muscles and motorical skills of the arm.

Standing on ones hands with the feet against the wall is a great healthy fun and life prolonging excesise thatt have roots all the way back to pre babylonian times (i hope) also widely used in the scientific community it is said that Albert onestone used this techniw´que frequently when encountering niels borh in a head on debat on kvantum physics.

be careful and be close to the wall and bend the arms so that the albowjoint does not "lock" this is bad. Stand with the hands in different positions and with a variation in the distance between them. It is very difficult to do this too much (NB!!!!it should not do done 3 hours after eating, when you have to go to the bathroom or if you are in the female "cycle".)

Handstand is designed to strengthen the shoulders, the back and front of the abdorminal region, and helps the brain to think straighter and more creativily.

brain, well reading books of different origin, practising new languages, looking at art and colours, having conversations with intelligent people, playing games like chess are great and funfilled ways to keep the brain from falling apart;)