Erin Calderone, MS, NASM Master Trainer, CES, BCS, AFAA-GFI

Optimize your equilibrium with these progressive single-leg challenges.

Who needs an instructor? Design your own cycling workout and ride, Sally, ride!

Three stretches you should never do — and what to do instead.

These two essential calf movements will sharpen every facet of your lower leg.

Try these two essential hamstring moves that can improve your training potential — and your rear view.

Trim the torso? Support the spine? Power your punch? Strong obliques do it all.

Channel your inner beast and awaken the power of primal movement with Animal Flow.

These two upper-body moves create a defined chest with real push-up power.

Dial up your vertical power and enhance your metabolic capacity with these four squat-jump variations.

Construct some serious strength with these four variations of the shoulder press.

Prevent injury from head to toe with these trouble-spot targeting moves.

Professor Erin Calderone answers this burning question about crunches.

These unique routines will surprise your muscles and keep you feeling — and looking — younger than ever before.

Return to your ancestral roots with these six innate movement patterns to improve your functional — and physique — results.

Get better results from more than 20 exercises with this workout wake-up call.

Untie the knots that are holding you back by releasing these five problem areas.

Body composition is important not only for physical aesthetic but also for performance and longevity. Here’s what you need to know to swing the percentages in your favor.

End your workout with one of these fat-blasting, Tabata-style finishers.

All fitness nerds and research geeks support the foam roller. Here’s why.

Build your best body with one (or both) of these tried-and-true training protocols.