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Physical Fitness in Female Soccer Players by Player Position: A Focus on Anaerobic Power

100%

Nikolaidis P. T.

Human Movement

2014

vol. 15

issue 2

74-79

Purpose. The aim of this study was to examine the relationship between player position and physical fitness, with an emphasis on anaerobic power, in female soccer players. Methods. For this purpose, 54 first league female soccer players were recruited. They included goalkeepers (n = 4, age 22.89 ± 4.37 years), defenders (n = 21, 21.92 ± 3.81 years), midfielders (n = 22, 21.71 ± 4.70 years) and attackers (n = 7, 20.43 ± 4.70 years). Participants’ anthropometric characteristics were measured and a physical fitness test battery was administered. Results. significant differences were observed in body fat percentage (F3,50 = 3.06, p = 0.036, n2 = 0.16) with goalkeepers being fatter than defenders (mean difference 6.1%; 95% CI 0.3,11.9). Positional differences were also found in the sit-and-reach test (F3,50 = 4.46, p = 0.007, n2 = 0.21), in which goalkeepers scored lower than defenders (-11.4 cm; 95% CI -21.4, -1.5) and midfielders (-10.0 cm; 95% CI -19.9, 0). Comparison of fat mass and endomorphy were statistically significant (p = 0.057 and p = 0.062, respectively), with goalkeepers showing the highest values; these differences were in the same direction as with body fat percentage. No positional differences were found in the other physical fitness components (aerobic capacity, anaerobic power, and muscle strength). Conclusions. Differences among player positions were observed in body composition (highest body fat percentage in goalkeepers) and flexibility (lowest score in goalkeepers). These trends are in agreement with previously published data concerning elite soccer players. These findings might be used as reference data by coaches and trainers to identify talent, select players, and monitor training.

Purine metabolism in the light of aerobic and anaerobic capacity of female boxers

86%

Domaszewska K., Szewczyk P., Kryściak J., Michalak E., Podgórski T.

Central European Journal of Sport Sciences and Medicine

2020

vol. 30

issue 2

97-106

The aim of the work was to assess the intensity of purine nucleotide degradation during maximum physical exercise. 5 elite female boxers were the subject of the study. Each of them underwent two exercise stress tests in order to evaluate the level of V̊O2peak and the level of anaerobic capacity during a Wingate test. The study involved collecting capillary and venous blood samples at rest and after the exercise test to determine the Acid-Base Balance (ABB), concentration of lactic acid (LA) and purine metabolism nucleotides. The average value of V̊O2peak was 40.92 (SD = 4.087) ml/kg/min, the average anaerobic capacity Ppeak was 7.57 (SD = 0.380) Watt/kg. The workload resulted in significant changes in the level of ABB and LA after both of the exercise stress tests (p < 0.001). Concentrations of hypoxanthine (Hx), xanthine (X) and uric acid (UA) in the blood increased significantly after the Wingate test (p < 0.05). The level of plasma purine nucleotides at rest and after standard exercise may be a useful tool for monitoring the adaptation of energetic processes in different training phases and support the overload diagnosis.

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1 Central European Journal of Sport Sciences and Medicine

1 Human Movement

1 2020

1 2014

1 Domaszewska K.

1 Kryściak J.

1 Michalak E.

1 Nikolaidis P. T.

1 Podgórski T.

1 Szewczyk P.

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Physical Fitness in Female Soccer Players by Player Position: A Focus on Anaerobic Power

Purine metabolism in the light of aerobic and anaerobic capacity of female boxers