Reddit mentions of Spartan Up!: A Take-No-Prisoners Guide to Overcoming Obstacles and Achieving Peak Performance in Life

When I started running a couple years before HRT it did the same. Your muscle are just not used to it.

I had stopped running due to an slip injury mid-Dec 2016. I started running again 3 months ago, at the same time I started HRT. The first two weeks were a bit hard, but it's normal after a 3-month break.

Now I'm back to outrunning ladies on bicycles and kids in roller blades. HRT doesn't stop you from that. Just work your way up, and remember, it's all in your head. One foot in front of the other, till the end.
I usually run 10k a day on my lunch breaks. Everyone says it's too much, but I remind them that to them, it's overtraining and to me, it's just a walk in the park! Also, I've found that since switching to 5finger shoes, I don't have shin issues anymore, as they force me to land correctly on my feet instead of my heels like regular running shoes.

Edit: Check out these two books, they've helped me tremendously:


Born to Run: A Hidden Tribe, Superathletes, and the Greatest Race the World Has Never Seen:
https://www.amazon.com/Born-Run-Hidden-Superathletes-Greatest/dp/0307279189

Spartan Up!: A Take-No-Prisoners Guide to Overcoming Obstacles and Achieving Peak Performance in Life:
https://www.amazon.com/Spartan-Take-No-Prisoners-Overcoming-Obstacles-Performance/dp/0544286170/ref=sr_1_1?s=books&ie=UTF8&qid=1495168868&sr=1-1&keywords=spartan+up

Late to the party but:

Spartan Up!: A Take-No-Prisoners Guide to Overcoming Obstacles and Achieving Peak Performance in Life by Joe De Sena

Eat That Frog!: 21 Great Ways to Stop Procrastinating and Get More Done in Less Time by Brian Tracy