Table 3 Self-reported regular training times and risk factors

Regular training time (h/wk.)

3 (1–7)

3 (1–5)

3 (1–7)

0.87

Regular training intensity

0.16

 Untrained (n (%))

0

0

0

 Light (n (%))

1 (2)

0

1 (2)

 Moderate (n (%))

31 (66)

6 (46)

37 (62)

 Heavy (n (%)

15 (32)

7 (54)

22 (36)

Risk factors (n)

Yes

No

Yes

No

Yes

No

NR

 Not acclimatized to heat

28

14

5

8

33

22

5

0.10

 Peer pressure

13

34

3

10

16

44

–

1.00

 Sleep deprivation

10

37

1

12

11

49

–

0.42

 Unaccustomed exercise

6

40

–

13

6

53

1

0.32

 Improper fluid intake

3

2

–

3

3

5

52

1.00

 BMI > 27 kg/m²

3

44

1

12

4

56

–

1.00

 Carrying heavy load (n = 8)*

3

4

1

–

4

4

–

1.00

 Smoking

–

47

2

11

2

58

–

0.06

 Alcohol

–

37

2

11

2

48

10

0.04

 Illicit drugs

–

37

–

13

–

50

10

–

Prescribed medication (n)

 ADHD medication

–

47

1

12

1

59

–

0.21

 Antihistamines

1

46

2

11

3

57

–

0.52

 Antidepressants

–

47

2

11

2

58

–

0.05

 NSAIDs

2

45

–

13

2

58

–

1.00

 Paracetamol

1

46

–

13

1

59

–

1.00

 Cardiovascular

–

47

–

13

–

60

–

–

Supplements (n)

 Beta-alanine

1

46

–

13

1

59

–

1.00

 Caffeine

12

35

6

7

18

42

–

0.18

 Creatine

–

47

–

13

–

60

–

–

 Mg/Ca/Zn

7

40

4

9

11

49

–

0.23

 Multivitamins

4

43

3

10

7

53

–

0.16

 Omega-3 fatty acids

2

45

1

12

3

57

–

0.50

Infections week prior (n)

 Upper respiratory tract

2

45

–

13

2

58

–

1.00

 Urinary tract

1

46

–

13

1

59

–

1.00

 Gastrointestinal

1

46

–

13

1

59

–

1.00

 Other

–

47

–

13

–

60

–

–