Aerobic capacity, not speed, is usually the limiting factor in how fast you can race, even for a distance as short as the 5K.

This short track session of 400-meter repeats will help you get fit fast. Here's a beginner and an advanced version.

A challenging, effort-based hill workout that takes you farther and farther — 'til you finally get to the top.

Our Buyer’s Guide testers like the Purist Mover water bottle for workouts because it’s lined with a thin layer of glass, so it won’t absorb the flavors of your protein powder or hydration mix.

Sharpen your speed and build high-intensity fatigue resistance with this simple cut down track workout designed for improving 5K, 10K, half marathon and marathon times

Hills, mud, redline intensity... training like an XC runner will make you a better runner all around: faster, stronger, more in tune with your body and mentally tougher.

Try this simple, fun, and effective structured fartlek to cultivate sprint speed and improve your 5k-marathon time.

Coach Carl explains why, how and when to do faster speed workouts during your marathon training, and how to prepare for specific course challenges.

Electric muscle stimulation claims to be a more efficient form of exercise. Here’s how it holds up.

Speedwork need not be a mystery — here are all the basic types of speed workouts and how to add them to your training to become a faster runner.

Three distinct types of progression runs — that finish faster than started — to incorporate into your training plans, plus their unique benefits.

The secret to pushing past your mental limits could be a handful of coins

Start training now to run your fastest 5K in 10 weeks! Our downloadable plan details every day's workout toward your 5K PR.

This marathon-specific workout will give you a good indication of what you'll be able to hit on race day.

Four challenging — and fun — speed workouts that don't require you to figure out how to get to a track.

A body in motion will inevitably need a little maintenance

Looking to level up? Get started with this inexpensive, four-move routine.

For a change of pace, try this mixed-bag workout to fine-tune your change of speed.

For serious training sessions that end in the ocean, any old bikini won’t do. Here are our favorite specialized sets.

New research sifts through the evidence to figure what types of intervals make you fastest

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