Running on straight legs is one of the special running exercises for athletes and many types of martial arts. Consider the technique and features of running on straight legs.
Execution technique
Starting position: in a standing position, stretch the right leg forward in a straightened state. At the same time, the right arm is also straightened and laid back, and the left arm is bent at the elbow and is at the level of the solar plexus in front. To perform the exercise, alternate arms and legs.
Execution features
The legs must be straight at all times. And when the leg is placed on the support and when it is in the air. A common mistake beginners make is that they begin to throw their bent leg forward.

Hands should work as in normal easy running, only more actively.

The body must be kept slightly inclined forward or vertically. Deviation of the body back is a gross mistake. This mistake causes the vertebrae to overstrain and removes the load from the legs. As a result, the exercise changes the whole meaning, and can also cause a back injury.

The foot is placed exclusively on the toe. This takes the load off the spine and simultaneously strengthens the ankle and calf muscles.
It is necessary to try to bring the leg under you with force. With the correct position of the body, the legs will automatically wind up under themselves in order to maintain the position of the body relative to the vertical.

What is the exercise for?
Exercise is an excellent way to warm up the body before training, as well as to work out the calf and gluteal muscles. Running on straight legs also improves the functioning of the hip joints.

The load received during the exercise is comparable to intense running, therefore, along with the warm-up functions, running on straight legs trains the heart and lungs.

Exercise is often included not only in the warm-up part, but also in the main part of the training.

Contraindications.
The exercise should not be performed by people with serious problems in the hip joint. Also, problems with the knee joints can be aggravated when running on straight legs. But in the latter case, you can try, and if there is no pain or discomfort, then feel free to perform the exercise.