Table 1.

Questions and variables regarding demographics, health history, physical activity, sport-specific training, and management.

Topic	Variable	Categories
Individual characteristics	Age	<1 year/1–2 years/2–4 years/4–6 years/6–8 years/8–10 years/>10 years/Deceased
	Sex	Sexually intact male/Neutered male/Sexually intact female/Spayed female
	Weight	Kilograms
	Breed group	Breed group 1–10 by Federation Cynologique International
	Breed	Breed by Federation Cynologique International or breed acknowledged by the Swedish Kennel Club/mixed breed
Health history	Hip dysplasia (Federation Cynologique International grade)	Grade A-E/do not know
	Elbow dysplasia (Federation Cynologique International grade)	No remarks/minor/moderate/severe/do not know
	Mental evaluation	Participated in official mental test/mental description/dog behavior personality description yes/no
	Injury	Never/Once/2–3 times/4 times or more
Physical activity	Time (duration) of low to moderate daily physical activity (minutes per day)	<15 min/15–30 min/30–60 min/1–2 h/2–3 h/3–4 h/>5 h
	Time (duration) of vigorous physical conditioning exercise (e.g., off-leach, running, swimming) (minutes per week)	0 min/ <30 min/30–60 min/60–90 min/90–120 min/120–180 min/>180 min
	Proportion of time spent off-leash	Never/ <25%/25–50%/50–75%/75–100%
	Preferred self-selected gait	Unwilling to move/Walk/Pace/Trot/Gallop/Do not know
	Physical conditioning exercise	Yes/no
	Content of physical conditioning exercise	Categories defined according to targeted component of canine fitness i.e., cardiorespiratory endurance, musculoskeletal components or a combination of both.
	Frequency of play sessions with other dogs (monthly)	Never/Approximately once per month/Approximately once every second week/Approximately once per week/Several times per week/Every day/Several times per day
	Surface used for physical activity	Natural grass/Turf/Forest/Field/Gravel/Sand/Asphalt/Stone/Concrete/Snow/Ice/Indoor venue/Home flooring/Other—water/Other—mobile/Other—soft. (see Supplementary Table 2).
Sport-specific training	Time (duration)—hours per week in categories and mean per category	0–1 h/1–2 h/2–3 h/3–5 h/5–7 h/7–10 h/>10 h
	Frequency of sport-specific training over a month	Never/Once a month/Every other week/Once per week/Several times per week/Daily/Several times per day
	Frequency of selected types of activities over the year	Never/Once a month/Every other week/Once per week/Several times per week/Daily/Several times per day. Reported as frequencies and total number of physical activities.
		Selected activities: tracking, search, mushing, obedience, messenger, International Utility Dog trial phase c - protection, Swedish schutzhund, mondioring, protection related to Police K9 or guard dog duty, hunting, game tracking, search and rescue, freestyle, patrol, racing, herding, agility, nose work, rally obedience, drag weight/weight pull.
	Participation in dog sports and working trials	Participation in agility, obedience, rally, any working dog discipline, messenger, protection, search, tracking, and number of disciplines
	Sport specialization - sport training and competition in one Swedish Working Dog Association discipline for ≥10 months per year.	Presented as a proportion by sport discipline and by the whole cohort.
		Specializing in agility, obedience, rally obedience, working trial discipline (i.e., messenger, protection, search, tracking).
	Surface used for sport-specific training	Natural grass/Turf/Forest/Field/Gravel/Sand/Asphalt/Stone/Concrete/Snow/Ice/Indoor venue/Home flooring/Other—water/Other—mobile/Other—soft. (see Supplementary Table 2).
Total work load	Time (duration) in low to moderate daily physical activity, vigorous physical conditioning exercise and sport-specific training (hours per week in categories and mean per category)	Median (inter quartile range)
Warm-up	Frequency of participation	Never/Seldom/Sometimes/Often/Always
	Time (duration) (minutes per session)	0 min/1–10 min/11–20 min/21–30 min/31 min or more
	Content of warm-up activities	Categories defined according to targeted effect general/sport specific/mobility/passive/other