Your school may have a track or gym that you can use, but if not, look for a nearby park with a running path or grab your ILP group and go for a run in your neighborhood. There could be a neighborhood gym you could get a membership for. If none of these options are available, you can look online to find workout videos. Past groups have also hosted a a yoga or Zumba night with their ILP group.
Once you’ve been assigned to a country and school, you’ll be able to ask the ILP Facebook group for your country and see how past volunteers exercised at their school. On your City Page (a website you’ll have access to once you’re officially assigned to a school), there is a section about working out and resources explained in more detail.
You may need to get creative with what you have available, but every semester, volunteers find ways to stay active.