Table 1 Agreement and motivation ratings (SE) for messages at pre-testing

Interview Cohort 1

Burns more calories per minute than jogging

2.27

2.42

2.46

3.67***^a

(0.16)

(0.16)

(0.13)

(0.14)

Burns more calories per minute than rowing

1.69

1.99

1.81

3.74***

(0.11)

(0.14)

(0.11)

(0.15)

Interview Cohort 2

Burns more calories per minute than jogging

2.60

2.44

2.77

4.53***

(0.15)

(0.17)

(0.13)

(0.08)

Burns more calories per minute than rowing

2.20

2.39

2.79

4.40***

(0.15)

(0.17)

(0.12)

(0.09)

b) Comparison messages

Aids weight loss

2.59

1.97†††^b

2.64

3.33**

(0.16)

(0.16)

(0.16)

(0.15)

Is daily exercise

3.87

3.34††

3.39

3.41

(0.14)

(0.14)

(0.15)

(0.13)

Exercises your heart

4.01

3.35†††

3.64

3.99

(0.13)

(0.16)

(0.08)

(0.13)

Helps to keep you healthy

3.30

2.69†††

3.54

3.63

(0.16)

(0.15)

(0.14)

(0.15)

Keeps you fit

4.07

3.50††

3.49

3.59

(0.12)

(0.14)

(0.12)

(0.14)