I would advise you to thoroughly explore the website of STRIVE and reach out to one of the leaders or previous participants with any questions you have so that you are sure that it will be right for you. If you are at all considering whether to participate, I STRONGLY encourage you to do so. You will gain so much more than you can predict going into it.
In Peru, every day was different as we ran through the mountains, tutored English for the local children, shopped in Cusco, played games at our hostel, tried new foods (like guinea pig!), worked at conservations or animal sanctuaries, and made new Peruvian friends.
I also participated in the Spanish immersion week before the main part of the trip, during which I took daily Spanish classes, explored the small mountain town, and lived with a host family. The last few days of the trip (the trek to Machu Picchu) were breathtaking and a great way to wrap up the experience.
My biggest fear was the fact that the experience of traveling to a foreign country without my family would be overwhelming or scary. I was also worried that my running level would not be on par with other people's and that I could be left behind. In reality, the program does such a great job of making sure that everyone feels comfortable and accommodated for and the range of runners meant I always had someone to join me.
What was most surprising and beneficial in my experience was the ways that we got to connect with the people whose home we were visiting during the different parts of our trip. I was worried that the program would isolate us from the actual people and culture of Peru, but in actuality we were able to interact with it in a way that was thoughtful and significant.