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# Breaks in long runs
# Inability to fix injuries
# Ineffective carbohydrate loading [[Carbohydrate Loading]]
# No downhill training
# Too much body fat
# Lack of race simulation[[Race Simulation]]
# Taper mistakes
# Detraining between races
(There are 13 mistakes in this list even though I've kept the title as 'top 10'.)
==Training Mistake 1 - Short training plan ==
It takes long periods of time to build up endurance, and I believe that many training plans are not sufficiently long. A good training plan should be long enough to build up gradually to the point of running several runs longer than 20 miles. The right length of training plan will depend on the individual concerned. Someone who can run a sub-90 minute half marathon will need less training time than someone who has never run more than 5 miles. Likewise an experienced marathoner should not need as much time to build up their long runs, compared to a first-time marathon runner. I would generally recommend six-month training plans for first-time marathon runners over shorter plans. However, this is not a firm rule, but depends on the level of initial fitness. The key will be to have a training plan long enough that your long run can reach over 20 miles with a slow enough ramp-up to avoid injury or overtraining[[Overtraining]].
==Training Mistake 2 - Insufficient long runs ==
Many marathon runners have 20 miles as their longest training run, and often at a much slower pace than they intend to race at. A long run of 20 miles at ~30% slower (~2:00 min/mile) than marathon pace is about half the difficulty of the race itself. My [[VDOT Calculator]] has a chart of the relative difficulty of long runs of different lengths and paces. I have seen a strong correlation between the success of a marathon runner and the length/pace of their long training runs. This is backed up by statistical analysis that shows that not training past 20 miles is a risk factor for 'hitting the wall'. Based on the relative difficulty of long runs from [[VDOT Calculator]] I would suggest that new marathoners aim for longer runs of at around 60%. That 60% equates to around 16 miles at marathon pace, 24 miles at ~30% slower (~2:00 min/mile) than marathon pace, or something in between. More established marathon runners could aim for 70% or more, but care must be taken to avoid injury or overtraining[[Overtraining]]. (A long run that leaves you noticeably sore or hobbling is probably too long, and it is best to reduce the training load until your body has adapted.) A good training plan should provide a mixture of the shorter, faster long runs and the further, slower long runs. Some training plans, such as [[Jack Daniels Running Formula]], mix up different paces within the same runs, such as a 22 mile run with 8 miles at tempo pace. These tougher long runs should be 4 weeks or more before the race. Many coaches don't recommend 20+ mile long runs because of the risk of injury, but the injury risk is related to the length of the training plan, as noted in mistake #1 above.
==Training Mistake 3 - Breaks in long runs==
The relative difficulty of long training runs is different between runs that are continuous and runs where there are breaks. Even relatively short [[Walking Breaks]] will allow for a surprising level of recovery, which is why ultramarathoners can cover such long distances. Unfortunately, many marathoners intended to race without any walking breaks[[Walking Breaks]], but do not train that way. I believe that walking breaks [[Walking Breaks]] can be used as part of marathon training to extend the distance that can be covered on the longer long runs. However, allowances should be made when evaluating your training. A long run with plenty of breaks should not be equated to the same distance and pace run continuously. Also, some of the long runs should be is continuous as possible. Often it is impractical to avoid stopping completely; you will need to refuel, cross roads, or change clothes. With some planning, it should be possible to minimize these interruptions and to keep the run is continuous as possible (see race simulation [[Race Simulation]] below). When doing [[Race Simulation]] it is important not to pause your watch on any breaks that are taken, so you have a good evaluation of the training impact.
==Training Mistake 4 - Inability to fix injuries==
Nearly all runners who focus on the marathon will encounter some injury. In many cases these injuries can be fixed early, while they are still minor. This requires that you pay attention to how your body feels and to use techniques such as massage [[Massage]] to find trouble spots early. The most common problems tend to be muscular in origin; sometimes they manifest as a muscular problem and sometimes they manifest as a tendon problem. (I've found that most tendon issues are actually muscular in origin.) In my experience, the vast majority of muscular problems can be fixed remarkably quickly and easily with [[Massage]] and [[Cryotherapy - Ice for Healing|Ice]]. Of course, not all injuries can be easily fixed, but [[Internal Control Index|taking responsibility]] for learning about your injury and the healing process will invariably improve your outcome.
==Training Mistake 5 - Ineffective carbohydrate loading ==
''Main article: [[Carbohydrate Loading]]''
The nature of the marathon distance means that running out of [[Glycogen]] (carbohydrate) is a major issue. [[Glycogen]] depletion impairs performance and can reduce a runner to a shuffling walking. While most marathon runners are aware of this problem and attempt to [[Carbohydrate Loading|carbohydrate load]] they rarely do so effectively. Simply eating more pasta the night before the race is not enough to properly [[Carbohydrate Loading|carbohydrate load]]. Instead, you need to aim for 10 grams of carbohydrate per Kg body weight the day before the race. That's a huge amount of carbohydrate; for me at 130 pounds that's about 47 slices of bread! The best option is drinks containing [[Maltodextrin]], as this has a high [[Glycemic Index]] and is easily digested. It's important to practice this for some of your long runs (see the 'lack of race simulation[[Race Simulation]]' mistake.)
==Training Mistake 6 - No downhill training==
''Main article: [[Downhill Running]]''
''Main articles: [[Race Simulation]]''
[[The Golden Rule of Racing]] is ''never do something in a race you have not practiced in training''. To avoid breaking this rule, it is necessary to do some race simulation[[Race Simulation]]. One way of simulating the race is to run a half marathon sometime towards the end of your training program. This provides a way to simulate the race and evaluate your fitness at the same time. However, a half marathon can be a little too short for simulating the full marathon. For instance, refueling can become harder as the race progresses and these issues may not be seen until after the 13 mile point. For experienced marathon runners, it may be practical to run a full marathon at a slower pace as preparation and simulation. I know of other runners who use part of a full marathon, either joining after a few miles or dropping before the end. However, the easiest form of race simulation [[Race Simulation]] is to use long training runs. The simulation is not perfect, but with some forethought and effort it can be made reasonably close.
==Training Mistake 9 - Taper mistakes==
''Main articles: [[Practical Tapering]], [[Tapering Tips]], & [[The Science of Tapering]]''
There are many mistakes that can be made during the taper, but the most common I see is a lack of intensity. Many marathon runners reduce both training volume and training intensity, but the science shows that it is important to maintain the training intensity while reducing the volume. Personally, I have found the most effective approach is to reduce training volume significantly, while aiming to run primarily at race pace. There is evidence that running economy [[Running Economy]] improves most at the most common training pace, so training at marathon pace during the taper can help optimize for that pace. It also helps build a sense of the correct pace and establishes familiarity and comfort with the pace. The runs during the taper do not need to be particularly long, as endurance adaptation is believed to take several weeks. The other common taper mistake is around duration. The optimum taper appears to be about two weeks, and it may be that three weeks is a little long for many people. Occasionally, runners will cut the taper too short but this seems to be relatively rare. The timing of the last long run is covered in [[Practical Tapering]]. (I didn't see [[Taper Psychosis]] as a mistake, but just a natural part of racing.)
==Training Mistake 10 - Detraining between races==
I see a common pattern amongst recreational marathon runners where they take too much time off between races and so detrain. They then have to build up from a relatively low level of endurance and end up with only a few 20 mile long training runs. A typical pattern I've seen is to race every six months, with two months of downtime after a race followed by a four month training program. By contrast, the best marathon runners I know are doing 16+ mile training runs within a couple of weeks of the race. This allows them far more long runs, and much longer long runs in any given year. I believe that more marathon runners should capitalize on the endurance they've built up for one race by getting back to serious training as quickly as practical after a race.