Voice over for Indoor cycling fitness video (Voice: Female, English)

I have 50 mins of Spinning (indoor cycling) video. Unfortunately original audio was not recorded properly so I have very poor audio quality. I need to do a voice over which is basically reproduce the instructor voice. It doesn't need to be exactly the same wording as the original session but it should provide relevant instructions. Note that the voice over needs to be in female voice and English. Basically I am looking for someone to provide voice instructions for 50 mins session. Ideally I need someone that is familiar with spinning so relevant instructions can be produced. The language is in English. The videos are about 30gb to be downloaded but I can upload them to youtube as well if needed. You will have original audio as well but it will probably only used as reference since at is hard to hear what instructor is saying at times. The expectation is watch the videos, listen to existing audio and based on your creativity provide the audio for the workout session. Please provide sample of your voice as well. Part 1 of the video can be seen at link below to give you better understanding. [login to view URL]