Physical Activity Break
PAD
The participants in the intervention group performed the physical activity break, which mainly consisted of juggling exercises, for 15 to 20 min twice a week for 12 weeks (24 sessions). After the physical activity break was introduced to the participants by a sport scientist, they performed the physical activity breaks on their own via online training videos. They always started with a short warm-up, which included mobilization exercises (~1 min). Then, they practiced the juggling exercises (~10–15 min.). At the beginning of the intervention period, the participants started the juggling training with easy throwing and catching exercises with a scarf, bean bag, or ball. Progressively, the difficulty of the juggling exercises was increased by introducing more difficult tasks and using more scarfs, bean bags, and balls at a time, to the maximum of three. The participants were informed that the exercises may be repeated in the next session(s), depending on the difficulty of the exercise. This was done to remove the pressure to learn one exercise within one session and to practice outside of the physical activity breaks. The session ended with a relaxation exercise (~2–3 min). Once a week, the participants performed a static or dynamic balance task (~3 min) before the relaxation part. The participants had the opportunity to practice the balance exercise on the floor, or, if they chose to make the task more challenging, on a balance pad. To offer a variety of balance exercises, the participants trained a new exercise every week (Examples for the physical activity break sessions for the three different weeks of training.Exercises (