I have organized a scenario for a 45-year-old Korean woman weighing 55kg to challenge a marathon. I think it would be good for those who want to refer to it.

For a 55kg woman, considering age, managing the knees and hamstrings is important, so when practicing running, it is better to focus on recovery and balance rather than increasing distance.

Below is a realistic 6-month completion roadmap.

Step 1: Build Basic Fitness (Months 1-2)
The goal is to improve cardiovascular adaptation and muscular endurance. Create a rhythm with jogging 3 times a week (5-7km, pace 7-8 min/km) and build a muscle base with lower body strength training (squats, lunges, planks) once a week. On weekends, train your calves and knee muscles with a brisk walk of 10-12km. It's enough if you feel slightly out of breath, and if fatigue lasts too long the next day, reduce the intensity.

Step 2: Establish Running Base (Months 3-4)
During this period, the goal is to build the stamina to comfortably run 10-15km. A running routine 3 times a week is good: ① light jogging 8km, ② 400m×6 interval (for pace improvement), ③ LSD 15-20km. Add a strength and stretching session once a week, and on weekends, focus on recovery with a diet rich in carbohydrates and protein (sweet potatoes, brown rice, chicken breast, eggs). Check the cushioning of your running shoes every 500km.

Step 3: Adapt to Long Distances (Months 5-6)
This is the time to run over 30km and build full marathon stamina. Structure your running 4 times a week with a 10km pace run on Tuesday, a 15km steady run on Thursday, a 28-32km LSD on Saturday, and a 5km recovery jog on Sunday. Replenish fluids every 5km and energy with gels or bananas every 10km, and start tapering by gradually reducing distance 3 weeks before the race (25→18→10km).

Step 4: Pre-Race Condition and Mental Management
A week before the race, only do light jogging of 5-8km, and maintaining sufficient sleep and hydration is key. Keep your diet as usual, but fill up on glycogen with sweet potatoes or pasta the day before. On race day, think of it as '8 small marathons' divided into 5km segments, and focus on maintaining form after 30km.

Step 5: Injury Prevention Habits
Always stretch for 10 minutes after running, and set knee rest days every 1-2 weeks. Manage recovery with a foam roller and icing, and it's good to check your condition with a half-distance (21km) trial run once a month.

If you consistently follow this roadmap for 6 months, completing your first full marathon is definitely possible for a 45-year-old woman weighing 55kg.

Consistency and recovery are the real keys to success, rather than perfect records.