Re: Back injury and starting aikido?
Ashley may have be on to something here. Assuming that you don't want to wait the several months until a medical consultation, perhaps your partner can start Aikido with an instructor who will be willing to take his condition on. It is possible to start training, IMHO, without having to take falls or stress a weak point by throwing. Just doing the warm-ups and aiki-taiso exercises are part of the art and may be doable by your partner in the meantime. Not nearly as fun as the rough and tumble of a full class, but critically important to development in the art. My bottom line is listen to your body and exercise great caution on the mat until the medical situation is resolved. Did I mention caution? Patience is part of the training too.