Eat healthy, balanced meals. Eat at least five fruit or vegetables a day and have lots of hot drinks throughout the day to keep warm.
Keep moving. When you’re indoors, try not to sit still for more than an hour. Get up and wander about, maybe spread out chores throughout the day. Even standing up once an hour is helpful. Being active helps your wellbeing, fitness and helps keep you warm.
If walking is difficult, you can do chair-based exercises while sitting or holding on to the back of a chair, the NHS website has lots of seated exercises which you can do at home.