scholarly journals Difference in Internal and External Workloads between Non-Injured and Injured Groups in Collegiate Female Soccer Players

2020 ◽  
Vol 8 (2) ◽  
pp. 26
Author(s):  
Ai Ishida ◽  
Joshua S Beaumont
Keyword(s):  
Heart Rate ◽  
High Speed ◽  
Training Session ◽  
Soft Tissue Injuries ◽  
Soccer Players ◽  
High Heart Rate ◽  
Competitive Season ◽  
The Mean ◽  
Micro Technology ◽  
Simple Average

Background: Effects of internal and external workloads (IL, EL) on lower limb soft-tissue injuries (LLSTI) risk in male soccer players has been described, the relationships remain unclear in collegiate female (soccer players. Objective: The purpose was to examine the mean difference in IL and EL in LLSTI between non-injured and injured groups (N-IG and IG). Method: 20 collegiate female soccer players (age: 19.2±1.2years; height: 168.2±7.3cm; body mass: 41.0±17.9kg) were included for 14 week competitive season. IL included average heart rate (Avg-HR) and high heart rate zone. EL included total distance, average speed (Avg-Spd), and high-speed running distance. Injuries were counted if (a) they were LLSTI and muscular/ligamentous strains or tears and tendon problems, and (b) the players missed more than one match or training session. Acute (7-day simple average) and chronic (21-day simple average) IL and EL were calculated in the IG while the mean of acute (7-day) and chronic (21-day) IL and EL were computed in the NIG. Acute Chronic Workload Ratio (ACWR) was calculated as the ratio of acute and chronic IL and EL. Results: Seven LLSTI occurred over 14 weeks. The acute Avg-HR and ACWR of Avg-Spd were significantly higher in the IG than the N-IG (p=0.001 and 0.024). IL and EL in the IG were placed below or above the mean of the N-IG. Conclusion: LLSTI might occur at high and low workloads in collegiate female soccer players. This may support the use of micro-technology to monitor workload based on individual player’s threshold to reduce LLSTI.

scholarly journals The Influence of Changes in Acute Training Load on Daily Sensitivity of Morning-Measured Fatigue Variables in Elite Soccer Players

2017 ◽  
Vol 12 (s2) ◽  
pp. S2-107-S2-113 ◽  
Author(s):  
Robin T. Thorpe ◽  
Anthony J. Strudwick ◽  
Martin Buchheit ◽  
Greg Atkinson ◽  
Barry Drust ◽  
...  
Keyword(s):  
Heart Rate ◽  
Sleep Quality ◽  
High Speed ◽  
Muscle Soreness ◽  
Linear Models ◽  
Heart Rate Recovery ◽  
Training Load ◽  
Soccer Players ◽  
Daily Training ◽  
Submaximal Heart Rate

Purpose:To determine the sensitivity of a range of potential fatigue measures to daily training load accumulated over the previous 2, 3, and 4 d during a short in-season competitive period in elite senior soccer players (N = 10).Methods:Total highspeed-running distance, perceived ratings of wellness (fatigue, muscle soreness, sleep quality), countermovement-jump height (CMJ), submaximal heart rate (HRex), postexercise heart-rate recovery (HRR), and heart-rate variability (HRV: Ln rMSSD) were analyzed during an in-season competitive period (17 d). General linear models were used to evaluate the influence of 2-, 3-, and 4-d total high-speed-running-distance accumulation on fatigue measures.Results:Fluctuations in perceived ratings of fatigue were correlated with fluctuations in total high-speed-running-distance accumulation covered on the previous 2 d (r = –.31; small), 3 d (r = –.42; moderate), and 4 d (r = –.28; small) (P < .05). Changes in HRex (r = .28; small; P = .02) were correlated with changes in 4-d total high-speed-running-distance accumulation only. Correlations between variability in muscle soreness, sleep quality, CMJ, HRR%, and HRV and total high-speed-running distance were negligible and not statistically significant for all accumulation training loads.Conclusions:Perceived ratings of fatigue and HRex were sensitive to fluctuations in acute total high-speed-running-distance accumulation, although sensitivity was not systematically influenced by the number of previous days over which the training load was accumulated. The present findings indicate that the sensitivity of morning-measured fatigue variables to changes in training load is generally not improved when compared with training loads beyond the previous day’s training.

Monitoring Elite Soccer Players’ External Loads Using Real-Time Data

2017 ◽  
Vol 12 (10) ◽  
pp. 1285-1287 ◽  
Author(s):  
Steve Barrett
Keyword(s):  
Real Time ◽  
High Speed ◽  
Training Session ◽  
Maximum Velocity ◽  
Soccer Players ◽  
Data Sets ◽  
Time Data ◽  
Electrical Systems ◽  
Locomotor Activities ◽  
Physical Output

Purpose: To assess the validity of measuring locomotor activities and PlayerLoad using real-time (RT) data collection during soccer training. Methods: Twenty-nine English soccer players participated. Each player wore the same MEMS device (Micromechanical Electrical Systems; S5, Optimeye; CatapultSports, Melbourne, Australia) during 21 training sessions (N = 331 data sets) in the 2015–16 and 2016–17 seasons. An RT receiver (TRX; Catapultsports, Melbourne, Australia) was used to collect the locomotor activities and PlayerLoad data in RT and compared with the postevent downloaded (PED) data. PlayerLoad and locomotor activities (total distance covered; total high-speed running distance covered, >5.5#x00A0;m/s; total sprinting distance covered, >7 m/s; maximum velocity) were analyzed. Results: Correlations were near perfect for all variables analyzed (r = .98–1.00), with a varied level of noise between RT and PED also (0.3–9.7% coefficient of variation). Conclusions: Locomotor activities and PlayerLoad can use both RT and PED concurrently to quantify a player’s physical output during a training session. Caution should be taken with higher-velocity-based locomotor activities during RT compared to PED.

scholarly journals A Comparison of Methods Used for Quantifying Internal Training Load in Women Soccer Players

2008 ◽  
Vol 3 (3) ◽  
pp. 320-330 ◽  
Author(s):  
Helen Alexiou ◽  
Aaron J. Coutts
Keyword(s):  
Heart Rate ◽  
Training Load ◽  
Soccer Players ◽  
Comparison Of Methods ◽  
Intermittent Training ◽  
Session Type ◽  
Training Activities ◽  
Soccer Training ◽  
The Mean ◽  
Individual Training

Purpose:The purpose of this study was to compare the session-RPE method for quantifying internal training load (TL) with various HR-based TL quantification methods in a variety of training modes with women soccer players.Methods:Fifteen elite women soccer players took part in the study (age: 19.3 ± 2.0 y and VO2max: 50.8 ± 2.7 mL·kg−1·min−1). Session-RPE, heart rate, and duration were recorded for 735 individual training sessions and matches over a period of 16 wk. Correlation analysis was used to compare session-RPE TLs with three commonly used HR-based methods for assessing TL.Results:The mean correlation for session-RPE TL with Banister’s TRIMP, LTzone TL and Edwards’s TL were (r = 0.84, 0.83, and 0.85, all P < .01, respectively). Correlations for session-RPE TL and three HR-based methods separated by session type were all significant (all P < .05). The strongest correlations were reported for technical (r = 0.68 to 0.82), conditioning (r = 0.60 to 0.79), and speed sessions (r = 0.61 to 0.79).Conclusion:The session-RPE TL showed a significant correlation with all training types common to soccer. Higher correlations were found with less intermittent, aerobic-based training sessions and suggest that HR-based TLs relate better to session-RPE TLs in less intermittent training activities. These results support previous findings showing that the session-RPE TL compares favorably with HR-based methods for quantifying internal TL in a variety of soccer training activities.

scholarly journals Influence of the Numbers of Players in the Heart Rate Responses of Youth Soccer Players Within 2 vs. 2, 3 vs. 3 and 4 vs. 4 Small-sided Games

2011 ◽  
Vol 28 (1) ◽  
pp. 107-114 ◽  
Author(s):  
A Dellal ◽  
R Jannault ◽  
M Lopez-Segovia ◽  
V Pialoux
Keyword(s):  
Heart Rate ◽  
Soccer Players ◽  
Lower Percentage ◽  
Training Methods ◽  
Youth Soccer ◽  
Technical Ability ◽  
Coefficients Of Variation ◽  
Maximal Aerobic Speed ◽  
The Mean ◽  
Physiological Demands

Influence of the Numbers of Players in the Heart Rate Responses of Youth Soccer Players Within 2 vs. 2, 3 vs. 3 and 4 vs. 4 Small-sided GamesThe purpose of this study was to compare heart rate (HR) responses within and between small-sided games (SSG) training methods in elite young soccer players. Twenty-seven youth soccer players (age: 16.5 ± 0.5 years, height: 174.5 ± 5.5 cm, weight: 62.9 ± 8.3, velocity at maximal aerobic speed (MAS): 15.9 ± 0.9 km.h-1) performed 3 different SSG (2 vs. 2, 3 vs. 3, 4 vs. 4 without goalkeeper). In each SSG, HR was continuously measured and expressed as a mean percentage of HR reserve (%HRreserve). The mean %HRreserve calculated during the SSG was significantly lower during 4 vs. 4 (70.6 ± 5.9 %) compared to 2 vs. 2 (80.1 ± 3.6 %, p<0.001) and 3 vs. 3 (81.5 ± 4.3 %, p<0.001) SSG. Regardless of the time spent above 60, 65, 70, 75, 80, 85 and 90 % of HRreserve, 4 vs. 4 solicited lower percentage of time than 3 vs. 3 and 2 vs. 2. Intersubject coefficients of variation were significantly higher during 4 vs. 4 compared to 2 vs.2 and 3 vs. 3. The %HRreserve after 30s of recovery was significantly higher for 3 vs. 3 (70.6 ± 5.3 %) compared to 2 vs. 2 (65.2 ± 4.8 %, p<0.05) and 4 vs. 4 (61.6 ± 9.3 %, p<0.05). In conclusion, this study demonstrates that the physiological demands is higher during 2 vs. 2 and 3 vs. 3 compared to 4 vs. 4 in youth soccer players. This difference could be due to that young soccer players do not have the same technical ability and experience as adult players and thus, their activity during the 2 vs. 2 and 3 vs. 3 induces a greater physical demand due to their lack of experience. The age of the players could be linked with the physical demands within small-sided games.

scholarly journals Bio-Banding in Junior Soccer Players – a Pilot Study

2020 ◽  
Author(s):  
Michael Romann ◽  
Dennis Lüdin ◽  
Dennis-Peter Born
Keyword(s):  
High Speed ◽  
Talent Development ◽  
Soccer Players ◽  
Chronological Age ◽  
Match Play ◽  
Physical Demand ◽  
The Mean ◽  
Number Of Passes ◽  
Mean Time

Abstract Objective Bio-banding (BB) has been introduced to account for varying maturity and to improve the talent development of junior soccer players. To date, research that investigated the physiological and technical effects of BB is sparse. Therefore, the aim of the study was to compare effects of BB with CA on selected technical and tactical parameters in U13 and U14 soccer players. Results BB significantly increased the number of duels (p =0.024) and set pieces (p =0.025) compared to chronological age. The mean time of ball possession per action was reduced (p =0.021) and the rate of successful passes was lower with BB (p =0.001). Meanwhile, the total number of passes was unaffected (p =0.796), and there was a trend towards a lower difference in ball possession between BB teams (p =0.058). In addition, BB reduced the distances covered while jogging (p= 0.001), running (p= 0.038) and high-speed running (p= 0.035). With BB, an increased number of duels, unsuccessful passes and set pieces resulted in a quicker change of match play situations between teams. While physical demand was reduced, BB seems to result in a more technically and tactically challenging game. Benefits in long-term player development, however, require further investigation.

scholarly journals Intra-individual variability of sleep and nocturnal cardiac autonomic activity in elite female soccer players during an international tournament

2019 ◽  
Author(s):  
Júlio A. Costa ◽  
Pedro Figueiredo ◽  
Fábio Y. Nakamura ◽  
Vincenzo Rago ◽  
António Rebelo ◽  
...  
Keyword(s):  
Heart Rate ◽  
Exposure Time ◽  
High Speed ◽  
Perceived Exertion ◽  
Sleep Time ◽  
Individual Variability ◽  
Rating Of Perceived Exertion ◽  
Soccer Players ◽  
Autonomic Activity ◽  
Cardiac Autonomic Activity

AbstractPurposeThis study provides insights into the individual sleep patterns and nocturnal cardiac autonomic activity responses of elite female soccer players during an international tournament.Materials and methodsTwenty elite female soccer players (aged 25.2±3.1 years) wore wrist actigraph units and heart rate (HR) monitors during night-sleep throughout 9 consecutive days (6 day-time training sessions [DT], 2 day-time matches [DM], and 1 evening-time match [EM]) of an international tournament. Training and match loads were monitored using the session-rating of perceived exertion (s-RPE) and wearable 18-Hz GPS (total distance covered [TD], training and match exposure time, and high-speed running [HSR]) to characterize training and match loads.ResultsIndividually, s-RPE, TD, exposure time, and HSR during training sessions ranged from 20 to 680 arbitrary units (AU), 892 to 5176 m, 20 to 76 min, and 80 to 1140 m, respectively. During matches, s-RPE, TD, exposure time, and HSR ranged from 149 to 876 AU, 2236 to 11210 m, 20 to 98 min, and 629 to 3213 m, respectively. Individually, players slept less than recommended (<7 hours) on several days of the tournament, especially after EM (n=8; TST ranging between 6:00-6:54 h). Total sleep time coefficient of variation (CV) ranged between 3.1 and 18.7%. However, all players presented good sleep quality (i.e., sleep efficiency ≥75%; individual range between: 75-98%) on each day of the tournament. Most of the players presented small fluctuations in nocturnal cardiac autonomic activity (individual nocturnal heart rate variability [HRV] ranged from 3.91-5.37 ms and HRV CV ranged from 2.8-9.0%), while two players presented higher HRV CV (11.5 and 11.7%; respectively).ConclusionOverall, elite female soccer players seemed to be highly resilient to training and match schedules and loads during a 9 day international tournament.

scholarly journals Control of training loads through perceived exertion. Prediction of heart rate (Control de las cargas de entrenamiento a través de la percepción subjetiva. Predicción de la frecuencia cardíaca)

Retos ◽  
2016 ◽  
pp. 82-86
Author(s):  
Victor Murillo Lorente ◽  
Javier Álvarez Medina ◽  
Pedro Manomelles Marqueta
Keyword(s):  
Heart Rate ◽  
Perceived Exertion ◽  
Cardiovascular Response ◽  
Training Session ◽  
Mean Value ◽  
Point Of View ◽  
Subjective Perception ◽  
Individual Values ◽  
Psychological Point ◽  
The Mean

Objective: To use the perceived exertion to control training loads and to predict indirectly the heart rate without the need for monitoring the player. Methods: Nine futsal Spanish players were included in the study. All were monitored for a minimum of 25 sessions during the season. Subjective perception of exertion was assessed daily using Borg's RPE scale. Results: The mean heart rate was 138 beats per minute (bpm), with a minimum value of 75.2% of the maximum heart rate, which is equivalent to 15 ("hard") on the RPE scale and to a mean value of perceived exertion of 15.06±2.01.  Individual values indicate that there are players whose perceived exertion is above, below or consistent with their heart rate. The results obtained differentiate four training session groups according to the players' heart rate values and perceived exertion. We used these results to develop a formula for predicting heart rate without monitoring the player.  Conclusion: Player's perceived exertion is not always consistent with their cardiovascular response. This demonstrates that training loads are not only perceived from the physiological perspective, but also from a psychological point of view. Resumen. Objetivo: Usar el esfuerzo percibido para controlar las cargas de entrenamiento y para predecir de forma indirecta el ritmo cardíaco sin la necesidad de supervisar el jugador. Métodos: Nueve jugadores españoles de fútbol sala fueron incluidos en el estudio. Todos fueron monitoreados durante un mínimo de 25 sesiones durante la temporada. La percepción subjetiva de esfuerzo fue evaluada diariamente utilizando la escala RPE de Borg. Resultados: La frecuencia cardíaca media fue de 138 latidos por minuto (lpm), con un valor mínimo de 75,2% de la frecuencia cardiaca máxima, lo que equivale a 15 ("duro") en la escala RPE y para un valor medio de esfuerzo percibido de 15,06 ± 2,01. Los valores individuales indican que hay jugadores que percibe el esfuerzo está por encima, por debajo o en consonancia con su ritmo cardíaco. Los resultados obtenidos se diferencian cuatro tipos de sesión de entrenamiento de acuerdo a los valores de la frecuencia cardíaca de los jugadores y el esfuerzo percibido. Utilizamos estos resultados para desarrollar una fórmula para predecir la frecuencia cardiaca sin la supervisión del jugador. Conclusión: El esfuerzo percibido del jugador no siempre es coherente con su respuesta cardiovascular. Esto demuestra que las cargas de entrenamiento no sólo se perciben desde la perspectiva fisiológica, sino también desde un punto de vista psicológico.

Periodization and Physical Performance in Elite Female Soccer Players

2015 ◽  
Vol 10 (5) ◽  
pp. 664-669 ◽  
Author(s):  
Jocelyn K. Mara ◽  
Kevin G. Thompson ◽  
Kate L. Pumpa ◽  
Nick B. Ball
Keyword(s):  
Physical Performance ◽  
High Speed ◽  
Training Session ◽  
Well Being ◽  
Sprint Performance ◽  
Soccer Players ◽  
Gps Tracking ◽  
Endurance Capacity ◽  
Subjective Well Being ◽  
Training Demands

Purpose:To investigate the variation in training demands, physical performance, and player well-being across a women’s soccer season.Methods:Seventeen elite female players wore GPS tracking devices during every training session (N = 90) throughout 1 national-league season. Intermittent high-speed-running capacity and 5-, 15-, and 25-m-sprint testing were conducted at the beginning of preseason, end of preseason, midseason, and end of season. In addition, subjective well-being measures were selfreported daily by players over the course of the season.Results:Time over 5 m was lowest at the end of preseason (mean 1.148 s, SE 0.017 s) but then progressively deteriorated to the end of the season (P < .001). Sprint performance over 15 m improved by 2.8% (P = .013) after preseason training, while 25-m-sprint performance peaked at midseason, with a 3.1% (P = .05) improvement from the start of preseason, before declining at the end of season (P = .023). Training demands varied between phases, with total distance and high-speed distance greatest during preseason before decreasing (P < .001) during the early- and late-season phases. Endurance capacity and well-being measures did not change across training phases.Conclusions:Monitoring training demands and subsequent physical performance in elite female soccer players allow coaches to ensure that training periodization goals are being met and related positive training adaptations are being elicited.

Sign in / Sign up

Export Citation Format

Share Document