Soccer can be characterised as an intermittent sport, with “repeated bouts of high-intensity running interspersed with periods of rest or low-intensity running”
In soccer, the final match result in team games, especially association soccer, is determined by multiple factors.
Training load can be classified in external load, which represents measures derived from position data or inertial measurement units and can be defined as physical demands imposed during training sessions or match scenarios;
Quantifying training is a common practice conducted in professional sports teams, the aims of which are to determine the external and internal load imposed on players through training and to determine the acute and long-term implications of training.
With its load characteristics, the team sport of soccer places high physical demands on players and thus is associated with a high risk of injury.
The main androgen, testosterone, affects a variety of parameters such as body composition, muscle metabolism and function, protein synthesis, and muscle mass.18,23 These parameters are related with the ability to perform efficiently during exercise.23,35,39.