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From Latin impulse, the term impulse refers to the action and effect of boosting (incite, stimulate, push). Boost is also the suggestion and instigation . For example: “This award is the impulse I needed to continue my writing career”, "We will give impetus to all productive activities that take place in the provincial territory", “We need momentum to get ahead”.

It is known as impulse to wish or emotion that leads to something untimely and without reflection : "I did not know what I was doing; it was just a boost ”, "Sorry, get carried away by the impulse", "I took her hand and kissed her: it was a boost but it was worth it", “Sometimes you have to listen to the heart and act on impulse: it is the only way to be happy”.

Boost is, on the other hand, the force that carries a body moving or growing: "The momentum of the ball was enough to reach the goal", "The car ran out of fuel half a turn from the end, although it ended up crossing the finish line thanks to the momentum it brought".

The expression "Take momentum" is linked to the action of running to make a jump or a throw with greater momentum: “Watch out for the well: you have to take momentum and jump with all your strength”, "The athlete took a long boost and threw the javelin at a distance that marks a new Olympic record", "I gained momentum and tried to jump the puddle, but I fell right in the middle of the water and had to change my shoes and socks".

Electric impulses and muscle electrostimulation

Impulses electric are variations in intensity or tension of a pulsatory type current, and usually only take a few microseconds and show an angular wave. One of the areas in which this concept is used is physiotherapy, more precisely electrostimulation. In this context, to obtain the desired result in each case it is essential to know the characteristics of the electrical impulse, which we detail below:

* frequency: defines how many times an impulse occurs per second and represents one of its most significant parameters. With respect to therapy muscle, lower frequencies stimulate slow fibers, while high ones affect fast fibers. To strengthen the slow muscles, both these and the fast, or only the fast, the ranges of 2 to 30, 30 to 70 and 80 to 120 hertz are used, respectively;

* time or width: This is the duration of the stimuli, the magnitude of which must be measured in microseconds, as detailed by Weiss's law (which establishes a relationship between the amplitude, the intensity and the duration of the application). A term related to this point is cronaxia, which comes from the concepts weather and value, and specify the weather that is needed to get a current to work on a muscle and produce a contraction;

* intensity: also called amplitude, it must be measured in amps (the unit used as a base to record the intensity of the electric current). When working with electrostimulation it is essential to pay special attention to the sensations that the patient experiences at each step; basically, three moments are distinguished, which are those in which you begin to feel the current, the point where contractions appear and the arrival of pain. Through the correct configuration of the pulse amplitude, it is possible to avoid the inconvenience, while maximizing the performance of the application.

Finally, it is important to carefully observe the time that passes between a contraction and the following; this is known as resting time, and is directly related to the result of the treatment. In a nutshell, the shorter said period, the greater the effort.

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