"Hardcore training" refers to an intense and demanding workout or practice that requires great effort, dedication, and determination to achieve specific goals. Full definition
When I was in hardcore training mode, I would even hit the gym after work from 6 - 7 pm, so had no time to relax at night. (rachaelattard.com)
I know that once I return home and return to my extremely healthy nutrition and hardcore training program, I'll be back in top shape within a week or two. (truthaboutabs.com)
It won't be hardcore training as much as a focus on learning about nutrition, training, fitness, and how to «get the edge» in endurance, life and health! (bengreenfieldfitness.com)