# Table 2 Virtual coach actions related to state transitions and also permanence in the same state

State transition no. Rules Actions
1 $$State_{prev} = o$$  $$State = o$$ $$Time>th_{pos}$$ Patient not well-positioned: VC suggests body repositioning; position rectangle in red color.
2 $$State_{prev} = \mathcal {S}/\{o,e,tg\}$$  $$State = o$$ Patient moves away from correct position: VC suggests body re-positioning; position rectangle in red color.
3 $$State_{prev} = o$$  $$State = i$$ Patient well-positioned: position rectangle in green color; VC gives exercise directions.
4 $$State_{prev} = i$$  $$State = e$$ Exercise beginning: VC displays target position marker (green).
5 $$State_{prev} = \mathcal {S}/\{o,i,tg\}$$  $$State = e$$ Patients stops moving: VC proposes movement repetition.
6 $$State_{prev} = e$$  $$State = n$$ The VC starts evaluating patient’s performance and asks one to reach the target position.
7 $$State_{prev} = \{tr,se,td,n\}$$  $$State = \{tr,se,td,n\}$$ $$Time>th_{tg}$$ Patient takes too much time reaching the target position: VC encourages patient to reach the target.
8 $$State_{prev} = \{tr,se,td,n\}$$  $$state = tg$$ Patient reaches the target: VC praises the patient; target position marker in blue color.
9 $$State_{prev} = \{tr,se,td,n\}$$  $$State = tr$$ Patient describes trunk rotation: VC suggests posture correction; it displays trunk compensation marker (red).
10 $$State_{prev} = \{tr,se,td,n\}$$  $$State = se$$ Patient describes shoulder elevation: VC suggests correction; VC displays shoulder compensation marker (red).
11 $$State_{prev} = \{tr,se,td,n\}$$  $$State = td$$ Patient describes displaces the torso: VC suggests posture correction; VC displays trunk compensation marker (red). 