Concerning: One hand up, pointing upwards with one hand down, pointing downwards.
Tamura sensei does an exercise during warmup where he points one hand up and the other one down while focusing on his breading. I wish I knew what he was doing internally, but he does not explain that mutch (or I am just not able to understand his teachings).
Tamura likes to do the Ba Duan Jin
or Eight Section Brocade Qi Gong
as a 'warmup'. The one hand up, one hand down is 'Separating Heaven and Earth'. The basic idea of that one is to generate contradictory tension up/down between the hands 'to stretch the suit'
Disclaimer: don't know the quality of information I linked to, one is wikipedia, the other a lengthy article. So just two places to start for those interested.