Megan Roche is the 2016 USATF Trail Runner of the Year at the ultra and sub-ultra distances. She is a five-time national champion, a North American Mountain Running Champion, and a six-time member of Team USA.

She graduated from Duke University with a degree in Neuroscience and received her M.D. from Stanford Medical School. She's currently back at Stanford, doing a PhD in epidemiology, focused on population health and genetics for athletes.

Today we're focusing on how to modify your training after a positive test or after your vaccine. We're going to learn what the vaccine does in our bodies, the effect it has on athletes, the types of exercise we might want to be cautious about post-vaccine, what side effects we can run through vs. what we should not run through, and more.

Thank you Precision Hydration!

Thank you to our newest sponsor, Precision Hydration. If you've ever struggled with hydration or electrolyte issues, use code STRENGTH15 to get 15% off your first order. They offer tablets, packets, and other essentials to help you train in any environment.

Precision Hydration knows that there isn't a one-size-fits all approach to hydration, which is why I love that they help athletes refine their hydration strategy for whatever event they're training for. If you can't get a custom sweat test done, they have a free online test that will give you your own personalized hydration strategy.

It's heating up where I am and I'm ending my runs a lot sweatier than I was just a month ago. I know I'll be paying a lot more attention to my hydration and electrolyte needs. This is especially important with longer runs in the mountains here at altitude.

You can learn much more about hydration in my conversation with the founder of Precision Hydration, Andy Blow.

Check out Precision Hydration and get 15% off your first order of electrolytes that match how you sweat by using the code "STRENGTH15".