Slow muscle fibers = endurance? 3 days ago at 08:35 The results of numerous studies conducted on MAZURENKO ARM, allowed to draw certain conclusions about the work of muscles and the development of endurance of the athlete. Igor Mazurenko will explain what's what. Not what you were looking for? Search for other text. With the testing of professional athletes with the MAZURENKO ARM (Angle Rush Meter) and observations, there are a sufficient number of experimental facts that allow us to assume that slow muscle fibers (SMF) determines the so-called local endurance (LE), allows to postpone the onset of fatigue and accordingly gives to the armwrestler a long time to pull. The ideal way to increase the aerobic power of muscles might be to increase the productivity of SMF. How can this be achieved? In order not to enter into complex aspects of the problem and from a simple article not to do a scientific review, let's look at endurance with the example of two athletes - Devon Larratt (Canada)