APEX Sufferfest video

Full frontal: How the Sufferfest’s 4D power profile can make you faster

by Neal Rogers

Honestly, we didn’t know what to expect. We just knew it would hurt.

In this case, “it” was a fitness test called Full Frontal, so named by the witty and masochistic crew at The Sufferfest, a subscription-based web training app for cyclists who want to get faster. Full Frontal is an hourlong indoor trainer session — power meter, smart trainer, or speed sensor (for virtual power) required — that puts riders through four different performance tests to get a clear picture of their strengths and weaknesses, which is then applied to future workouts. The net result of the Full Frontal test is a power profile Sufferfest refers to as 4DP — a rider’s four-dimensional power.

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