Shop › Marathon Sub 3 Hour 30 Training Plan Image 1 of 1 Marathon Sub 3 Hour 30 Training Plan £7.00 Work toward a marathon under 3 hours 30 minutes with an 18-week plan built around a 4:59/km goal pace. Add To Cart Added! Work toward a marathon under 3 hours 30 minutes with an 18-week plan built around a 4:59/km goal pace.