Appendix 1.
Frequency distribution of parent-reported sports participation and twin-reported physical activity items.
| Parent-Reported Sports Participation | |
| How often does your child engage in the following spare time activities, for at least half an hour per time: | N (%) |
|
| |
| Ball sports in a team (football, handball, basketball) | |
| Never | 5,119 (28.07) |
| A few times a month | 1,243 (6.82) |
| 1–2 times a week | 1,066 (5.85) |
| 3–6 times a week | 2,056 (11.28) |
| Daily | 321 (1.76) |
| Missing | 8,429 (46.23) |
| Ice hockey | |
| Never | 9,210 (50.51) |
| A few times a month | 125 (0.69) |
| 1–2 times a week | 40 (0.22) |
| 3–6 times a week | 195 (1.07) |
| Daily | 98 (0.54) |
| Missing | 8,566 (46.98) |
| Bandy | |
| Never | 9,308 (51.05) |
| A few times a month | 197 (1.08) |
| 1–2 times a week | 36 (0.20) |
| 3–6 times a week | 64 (0.35) |
| Daily | 10 (0.05) |
| Missing | 8,619 (47.27) |
| Skiing or snowboarding | |
| Never | 6,677 (36.62) |
| A few times a month | 2,411 (13.22) |
| 1–2 times a week | 342 (1.88) |
| 3–6 times a week | 141 (0.77) |
| Daily | 29 (0.16) |
| Missing | 8,634 (47.35) |
| Floorball | |
| Never | 7,825 (42.91) |
| A few times a month | 853 (4.68) |
| 1–2 times a week | 339 (1.86) |
| 3–6 times a week | 639 (3.50) |
| Daily | 49 (0.27) |
| Missing | 8,529 (46.78) |
| Athletics | |
| Never | 8,245 (45.22) |
| A few times a month | 946 (5.19) |
| 1–2 times a week | 263 (1.44) |
| 3–6 times a week | 137 (0.75) |
| Daily | 40 (0.22) |
| Missing | 8,603 (47.18) |
| Horseback riding | |
| Never | 8,647 (47.42) |
| A few times a month | 241 (1.32) |
| 1–2 times a week | 341 (1.87) |
| 3–6 times a week | 208 (1.14) |
| Daily | 214 (1.17) |
| Missing | 8,583 (47.07) |
| Gymnastics/dancing | |
| Never | 7,497 (41.12) |
| A few times a month | 682 (3.74) |
| 1–2 times a week | 1,134 (6.22) |
| 3–6 times a week | 298 (1.63) |
| Daily | 56 (0.31) |
| Missing | 8,567 (46.98) |
| Martial arts (karate, judo, taekwondo, budo) | |
| Never | 9,334 (51.19) |
| A few times a month | 80 (0.44) |
| 1–2 times a week | 172 (0.94) |
| 3–6 times a week | 61 (0.33) |
| Daily | 5 (0.03) |
| Missing | 8,582 (47.07) |
| Boxing/kickboxing | |
| Never | 9,496 (52.08) |
| A few times a month | 83 (0.46) |
| 1–2 times a week | 52 (0.29) |
| 3–6 times a week | 13 (0.07) |
| Daily | 4 (0.02) |
| Missing | 8,586 (47.09) |
| Wrestling | |
| Never | 9,509 (52.15) |
| A few times a month | 58 (0.32) |
| 1–2 times a week | 30 (0.16) |
| 3–6 times a week | 16 (0.09) |
| Daily | 6 (0.03) |
| Missing | 8,615 (47.25) |
| Strength training | |
| Never | 5,504 (30.19) |
| A few times a month | 1,572 (8.62) |
| 1–2 times a week | 1,857 (10.18) |
| 3–6 times a week | 714 (3.92) |
| Daily | 89 (0.49) |
| Missing | 8,498 (46.61) |
| Twin-Reported Physical Activity | N (%) |
|
| |
| How much do you move during sports lessons in school? | |
| I never or almost never join the sports lessons | 166 (0.91) |
| I sometimes join the sports lessons | 277 (1.52) |
| I always or almost always join the sports lessons, but I don’t move a lot | 642 (3.52) |
| I always or almost always join the sports lessons, and I move a lot | 3,733 (20.47) |
| I always or almost always join the sports lessons, and I get sweaty and/or out of breath almost every time | 6,137 (33.66) |
| Missing | 7,279 (39.92) |
| To which of these persons are you most similar? | |
| Person A: Moves quite little | 763 (4.18) |
| Person B: Moves quite a lot, but never so that he/she gets out of breath and sweaty | 628 (3.44) |
| Person C: Moves quite a lot and gets sweaty and out of breath sometimes | 2,623 (14.39) |
| Person D: Moves so that he/she gets sweaty and out of breath several times a week | 4,349 (23.85) |
| Person E: Moves so that he/she gets sweaty and out of breath every day or almost every day | 2,548 (13.97) |
| Missing | 7,323 (40.16) |
| Do you exercise/work out in your spare time? | |
| No, never | 1,164 (6.38) |
| Yes, but seldom | 1,552 (8.51) |
| Yes, once a week | 1,108 (6.08) |
| Yes, several times a week | 5,081 (27.87) |
| Yes, almost every day | 2,011 (11.03) |
| Missing | 7,318 (40.13) |
Total unique individuals is 18,234. Percentages rounded and may not total 100%