What is the minimum number of weekly runs I need in marathon training?

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What is the minimum number of weekly runs I can do when training for a marathon?

Four runs a week could be considered, but you may not give your best performance and the sessions you do will all need to have a purpose. Try a long run, a tempo run, a recovery run and an interval session. Build the long run up to 18-20 miles, the tempo run from 30-60 minutes and the recovery run from 45-50 minutes. For an experienced runner the interval session could be 10x3 minutes, with one minute of recovery, or 5x6 minutes, with two minutes’ recovery. If you’re a beginner, too much specific running in one week would risk injury. If this is you, concentrate on general steady running and building up your longer run. Then progress to adding tempo running or interval work once a week.