Abstract
In this study, the aim was to investigate the cardiovascular responses that happen in players during indoor soccer (IS) competitions. Nine participants, indoor soccer players in the Universities League, took part in the study (20.66 ± 1.87 age; 177 ± 4.5 height; 73.33 ± 8.07 weight). Cardiovascular changes happening during the competition were measured through a heart rate (HR) monitor that records once per second (Polar V800, Lake Success, NY, USA), and running distances by the Polar GPS (Polar V800, Lake Success, NY, USA) system. Maximum oxygen usage capacity of the participants (VO2max) was determined by using Yo-yo intermittent recovery test level 1, one of the indirect measurement methods. Cardiovascular loads coming out during the competition were separated into three zones for the sake of better understanding: HRmax 70%, low-intensity zone; HRmax between 70-85%, moderate intensity zone; and HRmax 85% and over, high intensity zone. Descriptive statistics were used in the assessment of the data obtained. The average distance that the participants covered, according to the GPS measurements, was found to be 1617 ± 873 m, on average VO2max 47.33 ± 4,47ml.kg per min-1. The participants spent 72,2% of the time that they were active in the game in the high intensity zone. The fact that participants spent a high percentage of time in this zone that consisted of high intensity activities clearly showed that indoor soccer is an intermittent high intensity branch of sports. Participants spent 15,8% in the low intensity zone indicating that repetitive loads without the opportunity for recovery could be found. Having a high percentage of high intensity activity may negatively affect performance because of fatigue; thus, it is important to organize the optimum in-play time for the indoor soccer players to get better performance.
Highlights
Success in sports is in direct proportion to the level at which the fundamental motor features that the sports branch needs are met
Players have to respond to cardiovascular demands at maximum heart rate levels of 85-90% during indoor soccer competition (Barbero-Alvarez et al, 2008), and it has been observed that the players reach the maximum heart rate levels during most competitions
The aim of this study was to determine the dimensions of the cardiovascular responses happening during an indoor soccer competition by separating them into three main zones (HRmax 70%, low-intensity zone; HRmax between 70-85%, moderate intensity zone; and HRmax 85% and over, high intensity zone) in terms of heart rate variability on the basis of the response of the cardiovascular system
Summary
Success in sports is in direct proportion to the level at which the fundamental motor features that the sports branch needs are met. Each sport branch has basic requirements for positive practices; in indoor soccer (IS), accurate transfer of skills such as passing, shooting, dribbling and other special skills is an important factor of performance. Players perform actions such as deflection, instant acceleration and deceleration, sideways running, and isometric spasms during competition. The duration of indoor soccer competition is 40 minutes. Players have to respond to cardiovascular demands at maximum heart rate levels of 85-90% during indoor soccer competition (Barbero-Alvarez et al, 2008), and it has been observed that the players reach the maximum heart rate levels during most competitions
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