Go to the Running Tracks in the morning and you'll find Erika by the 50 yard line on the south side of the field. It can only be used once, so if you only have one dose, you can only use it for one attempt. This handy 'vitamin' will give you extra time. If you have Vitamin XXX in your inventory, you'll be prompted to use it before beginning the challenge. You promised to train with Erika to be the new wide receiver! Meet Erika at running tracks in the morning