Staying active during the dead of winter when most of us want to hibernate until temperatures rise can be challenging at any age. For seniors, in particular, it can be difficult to find activities that are both enjoyable and safe. But staying active is critical and should be part of your everyday life. The National Council on Aging says regular exercise can help older adults stay independent and prevent many health problems that come with age. Here are 14 activities, both indoor and outdoor options, that experts say can help seniors stay in shape until spring officially arrives.