Treadmill training while providing many benefits , it also presents some disadvantages mainly involving professional runners who are interested in running contests. Let's look in detail what are these disadvantages of treadmill training:

1. Lack of Specialization

For professional runners, treadmill has some drawbacks that are associated with the lack of specialization when runners train for running contests.

There is a general rule about preparing for running contests suggesting that your training environment should be similar to the actual environment you are preparing for. This means that the conditions should be the same. It is obvious that there are significant differences, such as lack of air resistance, lack of diversification of the territory, running on a moving belt as well as biomechanical and psychological differences, between running on the treadmill and running on the track or street.

2. Lack of air resistance

When running on the treadmill, it is obvious that you are in a still condition not running through the air. When running outdoors you crosses the wind, which raises resistance. The quicker you run, the more you feel the resistance of the air over you. On the treadmill, you can simulate air resistance, adjusting the slope by 1-2%.

3. Bioengineering of running

Apart from the problem of air resistance, there is evidence that the Biomechanics of running is different when you run on the treadmill. A brief summary of the problems is shown below.

4. Length of stride

The more experienced runners tend to have more strides when on the treadmill than in the free running. In less experienced runners, the opposite is true: the length of the stride tends to be lower.

5. Less front slope

Some studies have established that some athletes run with less forward inclination of the body when they train on the treadmill. This can cause greater loss of energy to move up and down and less energy to move forward.

	Treadmill training image by sly420

6. Running surface

The level and soft floor of the treadmill is an advantage in many respects [See also "9 Benefits of Treadmill Training "], however, it presents a significant disadvantage. When running outdoors, the surface is mixed: stones, soft and hard surfaces, wet or dry points, and combinations of all these. Running on to these surfaces is a challenge, which enhances the perception or the ability of the neuro-muscular system to recognize the impact of different types of soil in muscles, joints and other members of the body. This is very important for the runners because it affects the balance, strength and economy of running. Running on the treadmill eliminates this very important aspect of training.

7. Psychological differences

Psychology plays a very important role in the performance of runners. On a treadmill you encounter several psychological factors that reduce the benefits of training. Some of them are listed below.

8. Lack of visual perception

When running outdoors, you move between trees, buildings, cars and other people. When you're on the treadmill, you are not actually moving, so you do not have all this visual material, which gives you the feeling of running.

9. Running on a limited space

A properly mounted treadmill provides you with sufficient space that allows you to do extended strides. However, the limited physical size of the treadmill, can give you the impression that either you will step out of the treadmill or that you will fall rearward. This usually leads to smaller and / or more perpendicular strides. The claustrophobia is also a feeling that you may feel when running in close and restrained space.

10.Lack of Confidence

Very often runners that are used to running outdoors are not accustomed to the "artificial way of running", as some call the treadmill. They do not feel confident that the treadmill can help them in their training.

11.Boring and monotonous

Borden’s is the one of the mental obstacles inherent when training on the treadmill because running "on the spot" can be very boring and monotonous.

Despite the disadvantages of running on the treadmill, there are also some benefits of treadmill training. These are summarized below:

• Running with any weather
• Accuracy in pace training
• Steady pace
• Easy Runs
• Hill Training
• Accident Prevention / Recovery
• Excellent tool for beginners
• Training with oscilloscope
• Variety in training

More details are available in this post "9 Benefits of Treadmill Training"