Ataxia is usually treated with a combination of rehabilitation and compensatory strategies.
An exercise programme to strengthen the core muscles may help. This is because many people with ataxia have poor balance and will spend much of their day sitting down. This can lead to weakness of the muscles, especially the core muscles, which can make the problem worse. A physiotherapist may be involved to identify exercises that help you to build up core stability and strength in your muscles.
This involves trying to find ways to make specific tasks and situations easier to manage. For example, if ataxia is affecting your arms, using weighted cuffs can sometimes dampen down the effects. Tight fitting lycra clothing can also help some people manage their ataxia. If your balance is affected, walking aids may help. A physiotherapist with expertise in MS can advise you on these approaches.
I also found this youtube video showing someone doing exercises to improve balance with ataxia, but I think it is always wise to get proper medical advice before starting any sort of exercise program if you have an impairment.