endurance

High intensity exercise allows you to perform more work in a shorter amount of time. Learn how to maximize these workouts by choosing the right supplement ingredients. Editor's note: article pictures feature NutriForce sponsored athletes Alessandra Pichelli (4th in the 2013 CrossFit Games) and...

Brewer's yeast boosts endurance capacity The DNA and RNA in the cells of all living organisms are made up of nucleotides like the ones above. Genetic material is shaped like a spiral staircase, and when two nucleotides are attached to each other they form a step. The cells read the DNA by...

High intensity exercise has quickly become a growing trend within the fitness community because it allows for more work to be performed in a shorter period of time and it helps the athlete achieve higher levels of anaerobic fitness. As our lives become busier, extended workouts or high volume...

The Basics: Muscle Fiber Type and Athletic Ability Human muscle fibers can be classified into two categories. Slow-twitch (red) muscle fibers und fast-twitch (white) muscle fibers. The predominance is determined by our genetics. The ACTN3 (Alpha Actinin) gene is active only in fast-twitch...

Edgar Artiga You’re familiar with the standard cardio players—the treadmill (both motorized and nonmotorized); the spin, recumbent, and Airdyne bikes; and the StairMaster—but we’d like to introduce you to a lesser-known member of the roster: the SkiErg. Released by Concept2 (the same company...

Dmytro Aksonov / Getty Getting stronger and building endurance are two very different goals that have long been considered conflicting, but is it actually unrealistic to work toward both with the same program? A recent study out of Australia’s James Cook University looked at how concurrent...

EXTREME-PHOTOGRAPHER / Getty Varying your workouts is critical to avoiding training plateaus and seeing continuous results, but that doesn't mean you have to change every variable every time out. The two weekly workouts below contain the same four exercises but are significantly different. In...