Please recommend quality treadmill for 74+

[Anonymous]

My parents are in their mid-70's and usually very active. Think senior-group hikes on moderate trails and gym 5x week with light swimming and treadmill/bike. Both have been at home since mid-March, socially isolating. Mom has been suffering from the lack of movement/exercise. I would like to get them a treadmill so they can keep moving, as they might want.

I am thinking a treadmill with an easy/large "stop" function, in case of loss of footing and a simple interface/easy to operate. Anything else I might be missing? Any recommendations, please?

Thanks in advance!