Train for Your First Marathon and Finish It

  1. Complete a 30-minute baseline run
    35 min

    What this produces: a baseline distance and average heart rate — the numbers you will use to calculate every training pace for the next 16 weeks and to measure aerobic improvement after Phase 2.

    The only challenge: resisting the urge to run faster than conversational effort. A too-fast baseline inflates your target paces and leads to burnout.

    Run this test once, on a flat route or treadmill, wearing the watch or phone you will use for training. A flat, repeatable route keeps the week-5 comparison fair.

    The 30-minute baseline:

    1. Warm up: 5 minutes of easy walking or slow jogging
    2. Run for 30 minutes at a comfortable conversational effort — do not check your pace; let your body settle into its natural rhythm
    3. At 30 minutes, stop or slow to a walk and record total distance, plus average heart rate if your device captures it
    4. Cool down: 5 minutes of easy walking, then gentle hamstring and quadriceps stretches (30 seconds each, no bouncing)

    Record these numbers in your log:

    • Date
    • 30-minute distance (e.g., 3.2 miles)
    • Average heart rate, if available
    • An effort note: “easy”

    After week 5, run the exact same test again and compare the two distances — a longer distance at the same effort confirms aerobic improvement.