Table 1

Description of the main outcomes and other measurements of the study

 Measurement itemAssesment scale
Musculoskeletal pain and activity limitations
 Intensity of neck/low back pain in the past month23Visual Analogue Scale: 0–100 mm
 Frequency of neck/low back pain in the last 4 weeks170=no pain; 1=now and then; 2=most days of week, but not daily; 3=daily
 Radiating pain: from neck to arm/lower back to leg170=no; 1=yes
 Activity limitations due to neck/low back pain170=no; 1=yes
Perceived local musculoskeletal strain after the work day during the past month assessed for neck, shoulder, upper back, lower back, knee and hip38Numeric Rating Scale 0–6, with manikin illustrating the body regions: 0=not at all; 6=very much
Pain-related fear avoidance beliefs39 towards physical activityFive standard questions with Numeric Rating Scale 0–6: 0=disagree; 6=quite agree; total score 0–30
Health-related quality of life40 with Finnish reference values31RAND-36 Item Health Survey (RAND-36): score 0–100 for the eight subscores
Work Ability Index (WAI),41 Short FormTotal sum score of WAI Short Form: 3–27
 Current work ability compared with the lifetime bestNumeric Rating Scale 0–10: 0=not capable at all; 10=best possible
 Work ability in relation to physical work demands1=very poor; 2=poor; 3=average; 4=good; 5=very good
 Work ability in relation to mental work demands
 Personal prognosis of work ability 2 years from now1=hardly; 4=not sure; 7=almost certainly
Physical fitness tests
 Stand on one leg for static balance*42Score 0–60 s (best of 2 trials)
 Neck-shoulder mobility (sagittal movement)*42Sum score (2–6) right + left sides: 1=severe limitation; 2=some limitation; 3=no limitation
 Trunk side-bending for spinal flexibility*42Mean of right and left side bending, cm
 Modified push-ups for upper-body strength and ability during to stabilise trunk*42Number of correctly performed push-ups 40 s
 Static squat against the wallEndurance score 0–90 s
 6 min walk test43Distance walked in 15 m indoor track
Physical activity and sedentary behaviour
 Questionnaire developed to evaluate the fulfilment of current physical activity recommendations for health44 regarding aerobic and muscular type of activityNational Institute for Health, health and well-being for residents research forms:
 Objective assessment with accelerometer for 7 days (minimum of 4 days and 10 daily hours)24 25Waist-worn accelerometer (Hookie AM 20, Traxmeet, Espoo, Finland) using digital triaxial acceleration sensor (ADXL345; Analog Devices, Norwood, Massachusetts, USA) ±16 g