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1 Conduct strength and mobility training every other day. 2  Conduct endurance and mobility training (running) every other day. This also applies to foot marches more than 5 km in the toughening phase.  Avoid conducting foot marches, and endurance and mobility training on the same or consecutive days.
The primary elements of marathon training are: 1  Base mileage. Build your weekly mileage over time, running three-to-five times per week. 2  The long run. Do a long run every 7â10 days so your body can adjust gradually to long distances. 3  Speed work. Practice intervals and tempo runs to increase your cardio capacity.  Rest and recovery.