Table 2 Descriptive and test statistics for proof-of-concept criteria (feasibility of implementation and acceptance; primary outcomes) of the two conditions and of the difference scores between conditions

Heart rate

34^b

101.05 (12.18)

37^b

127.30 (10.61)

26.25 (20.85; 31.65)

Enjoyment

52

2.81 (0.49)

51

2.75 (0.52)

 − 0.63 (− 0.26; 0.14)

 Perceived difficulty

52

1.46 (0.64)

51

1.84 (0.64)

0.38 (0.13; 0.63)

 Perceived exhaustion

52

1.33 (0.51)

51

2.10 (0.78)

0.77 (0.51; 1.03)

 Motivation to repeat

52

2.46 (0.78)

51

2.16 (0.83)

 − 0.31 (− 0.62; 0.01)

Affect

 Valence pre

52

1.17 (0.38)

51

1.61 (1.13)

0.43 (0.11; 0.76)

 Valence post

52

1.38 (0.75)

51

1.57 (1.01)

0.18 (− 0.16; 0.53)

 Valence post–pre

52

0.21 (0.67)

51

 − 0.04 (0.85)

 − 0.25 (− 0.55; 0.05)

 Arousal pre

51^a

2.63 (1.23)

51

2.63 (1.43)

0.00 (− 0.52; 0.52)

 Arousal post

52

2.71 (1.35)

51

2.59 (1.33)

 − 0.12 (− 0.65; 0.40)

 Arousal post–pre

51^a

0.08 (0.69)

51

 − 0.04 (1.18)

 − 0.12 (− 0.50; 0.26)