External and internal training load relationships in soccer players

Abstract

The aim of the present study was to examine the relationships between internal training loads (TL) (Polar (PLR), Edwards (EDW) Training-Impulse (TRIMP) session RPE (s-RPE) external TL (Total distance (TD), covered distance in five different zone, number of acceleration (ACC) and deceleration actions (DEC) in professional soccer players. Twenty male professional soccer players (age = 27.6 years; height = 177.6±7.1 cm; body mass = 69± 8.3 kg) from a professional soccer team voluntarily participated in the study. The correlations between the values were examined individually for each athlete by Pearson correlation test. According to the results of this study showed that there were very large and nearly perfect relations between s-RPE and both HR-based methods (EDW and PLR TRIMP) (respectively, r = .51-.91; r= .44-. 90). Additionally, from moderate to large correlations were observed between internal TL methods and external TL methods (walking, number of ACC-DEC actions) (between r = .56-.82). Moreover, the relations between internal load and external load parameters were weakened in high-speed zones. According to the results of the current study, meanwhile s-RPE may be evaluated in practice as a useful and inexpensive for monitoring the internal TL method, the number of ACC and DEC actions could be appropriate for external TL.

Toward a New Conceptual Approach to “Intensity” in Soccer Player's Monitoring: A Narrative Review

“…In addition, differently from absolute values, relative ones provide normalized score-both external (e.g., percentage of maximal speed or power) and internal (e.g., RPE and percentages of HRmax or V Ȯ2 max) loads-in accordance with sport's demand (45,46,55,81). Although studies performed in soccer used absolute external or internal-intensity approaches (5,8,50), we speculate that should be necessary consider both relative external and internal factors to correctly evaluate the exercises' intensity in soccer. Actually, an athlete can perform a large quantity of highintensity running, but with a low internal response (e.g., low percentage of HR max).…”

“…Moreover, concerning external intensity, evaluating intermittent activity only by using speed measures permits to assess only a partial component of external physical demand (78). Indeed, studies reported that player load (calculated from accelerations) is largely associated with S-RPE (8,38,88). Moreover, Gaudino et al stated that for assessing performance demands, the use of metabolic power (derived by speed and accelerations) is more appropriated respect to the use of only speeds (38).…”

“…For example, S-RPE is more associated with volume indicators (e.g., total distance and low running intensity) than intensity ones (38,88). Specifically, the correlations were lower considering higher intensity thresholds and when speed was increased (e.g., high-speed running and very high-speed running distance, high-intensity events >2.5 m*s −1 , and high-intensity events >3.5 m*s −1 (8,38,87,88,89)). S-RPE and EL intensity features are poorly related in intermittent exercise due to other psychobiological factors that could influence the individual's perceived exertion (78).…”

Kadin Futbolculara Uygulanan Tabata Antrenmanlarinin Antropometri̇k, Fi̇zi̇ksel Ve Tekni̇k Performans Parametreleri̇ Üzeri̇ne Etki̇si̇

“…Son yıllarda futbol içerisinde rekabet ortamının artması, maç takvimlerinin uzunluğu gibi durumlar hem bireysel hem de takım başarısını etkilemeye başlamış durumdadır (Alemdaroğlu, 2021). Antrenörler, spor bilimciler ve kondisyonerler sporcuların performans düzeylerini ve sedanterlerin sağlıkla ilgili parametrelerini geliştirmek için yeni antrenman metotları arayışı içerisindedirler (Issurin, 2010).…”