Premature ventricular contractions can occur in a healthy person of any age, but are more prevalent in the elderly and in men. They frequently occur spontaneously with no known cause. Heart rate turbulence (HRT) is a phenomenon representing the return to equilibrium of the heart rate after a PVC.
Microcycle is the training work unit that can be various on lasting, structure and contents. In praxa microcycles last 2-14 days, but the most often variant is 7 days.ecause of that it can be told that there is no unique, universal microcycle structure that can be thought to be equally good for each possible cases. In the theory of sports training there is multiple microcycles classifications.
Write a guide. Short for bicycle motocross, BMX is a type of bike designed for dirt, street, flatland, and park rides. This is a more casual form of cycling, which riders enjoy for both pleasure and sport.BMX riding stems from Southern California in the early 1970s, and continues to grow in popularity ever since.In fact, BMX Freestyle is one of the biggest events of the Summer X Games.his is a more casual form of cycling, which riders enjoy for both pleasure and sport. BMX riding stems from Southern California in the early 1970s, and continues to grow in popularity ever since. In fact, BMX Freestyle is one of the biggest events of the Summer X Games.