Table 5

Principal component factor analysis suggesting the one-factor solution and the total variance explained

QuestionsLoadings
Q1: If you have had an acute hamstring injury, please rate your current level of pain or discomfort0.966
Q2: Are you currently taking part in your sport, training or other physical activity?0.990
Q3: How much pain do you have during walking?0.976
Q4: How much pain do you have during jogging or slow pace running?0.988
Q5: How much pain do you have during accelerating or sprinting for 30 m?0.970
Q6: How much pain do you have during static stretching of your hamstrings (toe touch while standing)?0.986
Q7: How much pain do you have during functional stretching of your hamstrings (straight leg kick)?0.988
Q8: Do you have pain/or discomfort when performing a full weight-bearing lunge?0.997
Q9: Can you perform one Nordic exercise (partner exercise where you attempt to resist a forward-falling motion using your hamstrings throughout the whole range of motion to the ground)?0.948
Q10: Can you perform 3 one-legged jumps for a distance?0.978
Total variance explained95.83%