Jonah Rosner | Elite Running Scientist on Instagram: "Most runners are told to stretch their calves and Achilles to run better. The problem is that efficiency does not really come from flexibility. It comes from stiffness. Your calf muscle and Achilles tendon work together as one unit. When the Achilles is stiffer, it takes on more of that stretch. That allows the calf muscle fibers to work more isometrically (this is just a nerdy term we use to mean the muscle does not move much, but it makes u

Priscilla Andrews on Instagram: "LAST ONE… The step down at this angle makes you stretch that hammy more as you push down and forward. BUT it has to be the leg curl machine that’s designed like this. The other one has you in an awkward position. This by far is one of my favorite finds. The gym is gonna be busy. You gotta get in where you fit in. ✨HAPPY TRAINING✨ Coaching, programs, and my favorite leggings, all linked in my bio. #fitnessmotivation #fitness #workouts"