There are so many options! Exercise videos are perhaps the most obvious option. You can check out our own ones here, or have a look on YouTube. Here you can find everything from dance workouts, intense HIIT workouts or Yoga sessions.
However, exercise doesn't have to be a formal session. You could do a bit of planting in the garden, get moving up and down the stairs regularly or lift some heavy tins to work on strength.
For even more suggestions, have a look at my blog on the topic here.
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