Let's get one thing straight: Building your legs is just as important as building any other muscle group. Your legs are the basis of your strength and power. Plus, a huge upper body on matchstick legs just looks silly.
The "Get Swole" attitude doesn't stop when it gets tough ... and today is tough. Finish every set and every rep. Don't rest until that tri-set is done. Then get ready for the next one. Let's go!