Changing Heart Rate to Futsal Players During Training Games

Keywords: heart rate, futsal, intensity.

Abstract

Heart rate can be considered an accurate indicator of physical effort because it may unravel important data about one of the most important training and/or game factors: physical effort intensity. Few researches have referred to the heart rate of players practicing minifootball or futsal. Our research focused on assessing heart rate during exercise, namely during the futsal game. During the games, we monitored heart rate beat by beat, using Geonaute technology. Our study found that the average HR during exercise ranged between 102 beats/minute and 147 beats/minute; the arithmetic mean is 129 beats/minute; the expansion is 45 beats/minute, while the arithmetic mean of HR_max is 209 beats/minute. This stands to show that players frequently exceed the Fc_max limit, generally recommended by scientific literature.

1.Introduction

Heart rate is one of the most important physiological indicators of the human body, both at rest and during exercise (Apostol, 1998). The cardiovascular system ensures the circulation of blood and lymph in the body, thus fulfilling two major functions: 1. distribution of nutrients and oxygen to all body cells; 2. collection of catabolism tissue products to be excreted. The motor force of this system is the heart, while arteries represent the distribution pipes. Veins - blood tanks - ensure its return to the heart, while microcirculation (arterioles, capillaries, venules) represents the vascular territory where substance and gas exchanges occur (Bota, 2002). Heart muscle cells function as a whole because of their interconnection. Hence, the action potential born from an exited cell propagates rapidly and easily, through the tissue of interconnections to all cells. These contractile cells are oxidative and they make up slow-twitch muscle fibres, thus adapted to aerobic exercise conditions. This stands to explain why the heart has the capacity of metabolizing the lactic acid produced by embryonic myocardial cells with glycolytic anaerobic metabolism. The cells of the embryonic myocardial tissue - the autonomic conduction system of the heart - feature functional automatism that makes up the excitoconductor system of the myocardium. Hence, the heart has its own self-excitation system that generates contraction (Hăulică, 2009). The systolic flow or systolic volume represents the amount of blood ejected upon each ventricular systole. It varies at rest - from one individual to another...