Blur the distinction between strength training and metabolic conditioning for the simple reason that nature's challenges are typically blind to the distinction

Coach Glassman

Mono-structural movements are those that build capacity in each of three metabolic pathways, beginning with aerobic, then lactic acid, and then phosphocreatine pathways.  These include running, biking, swimming, rowing, et al.  In CrossFit, we typically perform these exercises over short distances and brief times in order to keep the intensity high and promote speed training.  However, we are no strangers to performing mono-structural movements for increased distance and time in order to target the cardiorespiratory system and promote endurance and stamina.  We even carry dumbbells, kettlebells, medicine balls, yokes, sandbags, or wear a weighted vest while running to promote balance and coordination, and because it’s just harder!