Rebecca T ~ Thank you for your feedback. We're so sorry to hear that you fell onto your springs but glad to know that you're ok. We've added a note in the description about the correct spring. After talking to Tracey, we learned it should be a red instead of a yellow spring if you need more support for your hamstrings.
Rebecca T hello we put a note now for a red spring which is higher than blue. So if you find blue challenging switch to a red for more support. Thank you for your note most appreciated !!!! Thank you for your support xo