Table 2 Feasibility Outcomes

 Classes Attended^a

16 ± 5

15 ± 6

16 ± 5

0.106

 Attended ≥70% of classes^a

103 (73)

34 (69)

69 (75)

0.474

 Dropouts^a

17 (11)

10 (20)

7 (7)

0.034*^b

0.931

 Does not comply

28 (20)

10 (19)

18 (20)

 Complies

76 (53)

25 (52)

51 (54)

 Exceeds

36 (27)

13 (29)

23 (26)

0.287

 Does not comply

88 (58)

23 (58)

65 (66)

 Complies

43 (29)

16 (40)

27 (28)

 Exceeds

–

–

–

0.825

 Does not comply

24 (16)

9 (17)

15 (16)

 Complies

58 (42)

21 (42)

37 (41)

 Exceeds

57 (42)

18 (40)

39 (43)

0.571

 Does not comply

83 (61)

25 (66)

58 (59)

 Complies

43 (32)

12 (30)

31 (32)

 Exceeds

3 (2)

–

3 (2)

 RPE HI^a

14 ± 2

14 ± 2

14 ± 1

0.729

 RPE LO^a

10 ± 2

10 ± 2

10 ± 2

0.330

 Difficulty of Class (0–10)^a

7 ± 2

7 ± 1

7 ± 2

0.547

 Challenging (Y/N)^a

60 (100)

19 (100)

41 (100)

–

 Satisfied with HIIT (Y/N)^a

64 (100)

16 (100)

48 (100)

–

 Safe (Y/N)^a

62 (97)

14 (88)

48 (100)

0.060^c

 GXT

129 (89)

–

–

–

 Gellish Equation

11 (8)

–

–

–

 Sensitivity analysis – HI HR

0.074

 Sensitivity analysis – LO HR

0.910