The HIT sessions were performed as interval running, on a dribbling track or as small-sided games (SSG) all consisting of 4 x 4 min bouts separated by 3 min active recovery. Although, the effectiveness of heart rate (HR) for controlling or adjusting the intensity of a HIT session may be limited for several reasons (Buchheit et al. 2013), we chose the HR to assess the training sessions online mainly due to practicability, especially for the control of SSG and the dribbling track. HR was only measured during the first training session. The other sessions were only controlled online (Acentas, Högertshausen, Germany). If the intended heart rate of 90-95% of the individual maximal heart rate (HRmax) was too low during the online assessment of the intervals, athletes were advised to increase the intensity. To ensure the intended training intensity, the dribbling track was designed according to Hoff et al. (2002) and SSG were modified based on the findings of Hill-Haas et al. (2011). A standardized continuous 10-min warm-up was performed before all HIT sessions in each discipline.