**5. Methods**

Ten TT players (six males, 27 years of age; four females, 29.5 years of age; described in [30]) participated in the heart rate screening at the Czech National Table Tennis Tournament in 2015. Their pre-match HR was measured 1 minute before


### **Table 1.**

*The number of female and male participants in each group and their BMI.*

the match, and match HR was measured after 2 minutes of the play by sporttester Forerunner® 15, Garmin Ltd. Two matches of each participant were analyzed.

Fifty-four XC skiers (30.79 years of age; 15 females, 30.78 years of age; described in [15]) were measured during the Czech National Winter Games in 2015. Their resting HR was measured immediately before the exercise, and the exercise HR was measured after a 2-minute long step test by tonometer Omron M3.

The data collection was provided by the Healthy Athletes Clinical Directors and trained volunteers. All participants were in the spectrum of moderate levels of intellectual disability (below 70 points of IQ ) and practiced the sports for at least 1 year as according to the Special Olympics rules participants of the national SO games have to pass minimum 1 year training before the competition. Their characteristics are shown in **Table 1**. The informed consent with Healthy Athletes noninvasive screenings is provided by athletes and their caregivers prior the sport events. The athletes with ID liked to participate in Healthy Athletes screening as the HR measurement was a new attraction for them.
