Table 3 Results summary for patellar tendon findings before (baseline) and after running (follow-up)

 total

1 (0.5)

21 (10.0)

< 0.001

 male participants

1 (0.7)

18 (12.8)

< 0.001

 female participants

0 (0)

3 (4.3)

0.245

 BMI < 23 kg/m2

0 (0)

9 (7.3)

0.003

 BMI > 23 kg/m2

1 (1.2)

12 (14.3)

0.002

 age ≤ 35 years

0 (0)

15 (13.2)

< 0.001

 age > 35 years

1 (1.0)

6 (6.3)

0.118

 weekly training < 50 km

1 (0.6)

13 (9.1)

0.002

 weekly training > 50 km

0 (0)

8 (14.8)

< 0.001

 half marathon distance

0 (0)

7 (8.0)

0.014

 marathon distance

1 (0.8)

14 (11.5)

< 0.001