At my school in the winter we played football (Summer was athletics and Autumn was rugby) but when the ground was frozen it was deemed unsafe for playing on, so we had to go into the tennis court and play shinty.
Shinty is similar to hockey except the sticks are round, like thick walking sticks with the end bent over. You weren't supposed to lift the stick higher than shoulder height, except for those occasions where a ball was in the air and you needed to bring it down.
It was quite a fun game to play but there was one thing you tried to avoid - hitting a ball at the same time as an opponent. The clash of sticks would send a shock up your arms like you had grabbed a live wire with wet hands! Also falling over was not recommended as it was a hard court, not grass. It DID warm us up though!