Table 4.

Concurrent validity* of the Muscle-Strengthening Exercise Questionnaire (MSEQ) assessing days per week, duration and level of intensity for each type of muscle-strengthening exercise and all types combined

	Concurrent validity*
	Interclass correlations coefficient† (95% CI)	Spearman’s r‡ (95% CI)
How many days, in a usual week, do you do muscle-strengthening exercise?	0.64 (0.37 to 0.80)	0.49 (0.25 to 0.70)
Days per week by type
Use weight machines	0.69 (0.16 to 0.86)	0.76 (0.59 to 0.89)
Body weight exercises	0.74 (0.56 to 0.85)	0.59 (0.36 to 0.76)
Use resistance bands or free weights	0.72 (0.35 to 0.86)	0.64 (0.38 to 0.84)
Holistic exercises	0.78 (0.45 to 0.89)	0.77 (0.60 to 0.89)
All types of muscle-strengthening exercise	0.56 (0.37 to 0.71)	0.58 (0.35 to 0.76)
Duration (minutes/session)
Use weight machines	0.60 (0.18 to 0.79)	0.73 (0.56 to 0.87)
Body weight exercises	0.39 (−0.04 to 0.64)	0.34 (0.08 to 0.56)
Use resistance bands or free weights	0.78 (0.37 to 0.90)	0.74 (0.55 to 0.86)
Holistic exercises	0.70 (0.38 to 0.84)	0.73 (0.54 to 0.87)
All types of muscle-strengthening exercise	0.46 (0.24 to 0.64)	0.73 (0.59 to 0.83)
Level of intensity
Use weight machines	0.73 (0.38 to 0.87)	0.71 (0.52 to 0.85)
Body weight exercises	0.35 (−0.07 to 0.61)	0.30 (0.03 to 0.55)
Use resistance bands or free weights	0.78 (0.21 to 0.91)	0.68 (0.52 to 0.82)
Holistic exercises	0.69 (0.43 to 0.83)	0.63 (0.41 to 0.78)
All types of muscle-strengthening exercise	0.18 (−0.06 to 0.42)	0.45 (0.18 to 0.67)

*To assess the concurrent validity, MSEQ baseline responses were compared with a 7-day MSE log.

†Intraclass correlations coefficient between test and retest and its 95% CI.

‡Spearman’s rank correlation between test and retest and its 95% CI.