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Table 1 Descriptive information about participants, dosage, and progression of the respective injury prevention programme

From: Adherence to Injury Prevention Exercise Programmes in Amateur Adolescent and Adult Football: A Detailed Description of Programme Use from a Randomised Study

 

Extended Knee Control group

Adductor group

Comparison group

n = 20 coaches

n = 120 players

n = 17 coaches

n = 64 players

n = 24 coaches

n = 105 players

Age (years), mean ± SD*

47.6 ± 9.0

19.3 ± 4.3

45.9 ± 6.7

21.4 ± 6.0

41.6 ± 7.9

20.5 ± 6.6

Sex, n male/female (% male)

19/1 (95.0)

28/92 (23.3)

12/5 (70.6)

10/54 (15.6)

19/5 (79.2)

22/83 (21.0)

Cumulative utilisation

Number of IPEP sessions in total, n

483

4363

199

1644

585

3239

Training sessions in total, n

529

5451

315

2616

641

3836

Proportion of training sessions with IPEP (%)

91.3

80.0

63.2

62.8

91.3

84.4

Utilisation frequency

Full season, times/week ± SD

2.2 ± 0.3

1.6 ± 1.2

1.3 ± 0.5

1.0 ± 0.9

2.1 ± 0.4

1.4 ± 1.2

Pre-season, times/week ± SD

2.3 ± 0.2

N/A

1.7 ± 0.2

N/A

1.9 ± 0.3

N/A

Competitive season, times/week ± SD

2.1 ± 0.3

N/A

0.7 ± 0.3

N/A

2.1 ± 0.4

N/A

Duration fidelity†

Minutes spent on IPEP each session, mean ± SD

15.6 ± 4.3

16.6 ± 7.0

10.1 ± 4.6

7.1 ± 3.3

15.9 ± 7.2‡

14.6 ± 8.8

Utilisation fidelity†

Mean number of repetitions per exercise

 1–5

6 (30.0)

12 (10.0)

N/A

9 (14.3)

5 (20.8)

22 (21.0)

 6–10

6 (30.0)

47 (39.2)

N/A

24 (38.1)

6 (25.0)

22 (21.0)

 11–15

6 (30.0)

40 (33.3)

N/A

23 (36.5)

5 (20.8)

27 (25.7)

 16–20

1 (5.0)

11 (9.2)

N/A

4 (6.3)

2 (8.3)

16 (15.2)

 > 20

1 (5.0)

10 (8.3)

N/A

3 (4.8)

6 (25.0)

18 (17.1)

‘How did you use your programme at training?’

 Same exercise(s) throughout the season

2 (10.0)

25 (20.8)

6 (35.3)

35 (55.6)

7 (29.2)

N/A

 Different exercises for variation

18 (90.0)

93 (77.5)

5 (29.4)

14 (22.2)

13 (54.2)

N/A

 More advanced exercises over time

6 (30.0)

18 (15.0)

8 (47.1)

15 (23.8)

4 (16.7)

N/A

 Individual adaptation

1 (5.0)

7 (5.8)

8 (47.1)

4 (6.3)

3 (12.5)

N/A

 Exercises without close contact due to COVID-19

2 (10.0)

N/A

0 (0.0)

N/A

3 (12.5)

N/A

 Replaced or added exercises

5 (25.0)

N/A

2 (12.5)

N/A

N/A

N/A

‘When did you do the exercises?’

 Before football training, % of weeks

6.6

N/A

0.0

N/A

7.8

N/A

 As part of the warm-up before football training, % of weeks

75.6

N/A

61.6

N/A

70.2

N/A

 Imbedded in the football training, % of weeks

12.8

N/A

27.7

N/A

15.0

N/A

 After football training, % of weeks

2.3

N/A

0.0

N/A

4.1

N/A

 As part of warm-up before football match, % of weeks

7.8

N/A

0.0

N/A

14.7

N/A

 Other, % of weeks

15.5

N/A

13.6

N/A

15.0

N/A

‘Where did you do the exercises?’

 At football training

N/A

119 (99.2)

N/A

61 (96.8)

N/A

102 (97.1)

 At football matches

N/A

46 (38.3)

N/A

0 (0.0)

N/A

36 (34.3)

 At home

N/A

14 (11.7)

N/A

7 (11.1)

N/A

42 (40.0)

  1. Values are n (%) unless otherwise stated. N/A (not applicable) represent instances where this specific group of coaches or players did not receive the question
  2. Teams using extended Knee Control were recommended to use the programme for 15–20 min each training session, each exercise for 30–60 s and in two sets. They were also recommended to progress training over time with more advanced exercises. Teams using the adductor programme were recommended to use the most advanced exercise (Copenhagen adduction long lever) and progress from 3–5 repetitions to 12–15 during pre-season. They were recommended to follow a structured progression plan (repetitions and set) during pre-season, and thereafter to use maintenance training once per week during the competitive season. Alternative exercises (Copenhagen adduction short lever, side-lying adduction, adductor squeeze) were recommended for players with pain, those unable to do the Copenhagen adduction exercise long lever or those wishing to avoid close contact due to COVID-19
  3. COVID-19, Coronavirus Disease 2019; N/A, not applicable; SD, standard deviation. Utilisation frequency for teams is represented with weeks when the team had cancelled its training sessions (for example due to Easter or Summer break) excluded, whereas player utilisation frequency is calculated with all weeks included for which players have responded. Regarding when the exercises were used, coaches could respond with multiple alternatives
  4. *Missing data for 1 player in adductor group, 2 players in comparison group, 4 coaches in the extended Knee Control group, 3 in the adductor group and 6 in the comparison group
  5. †Missing data for one player in the adductor group
  6. ‡One outlier excluded who probably had misinterpreted the question
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