A recent study in the Journal of Applied Biomechanics suggests the marathon wall involves more than just glycogen depletion. Researchers analyzed 297 marathon finishers in Japan, tracking running mechanics with waist-mounted sensors. Runners exhibited distinct pacing patterns, with the 'wall' group showing abrupt changes late in the race.
The study found that both the 'wall' and 'early pace-down' groups shortened their stride and lost vertical stiffness. However, the 'wall' group's changes occurred suddenly, unlike the gradual decline in the 'pace-down' group. Step frequency also declined late in both slowdown groups, but remained stable among even pacers. Read more culture coverage.
The findings suggest that by the time runners hit the wall, their legs' spring-like behavior and stride length preservation may be deteriorating. While the study does not pinpoint prevention methods, conservative early pacing, carbohydrate intake, long runs, and strength training remain key strategies. Related: Trained Runners’ Hearts Work Less, Study Finds.
This original Runner World brief is based on reporting from Marathon Handbook. Visit the source for its complete reporting, context and any later corrections.