Table 4.

Comments made by the physiotherapists, the patients, and the implications. Note that feedbacks from the physiotherapists are in italic.

Exercise games	Positive comments	Negative comments	Implications
Cycling	“I like this game a lot!”	“It is difficult for the patients who are at the beginning phase of their physiotherapy to wave to other virtual humans or to put out a hand to indicate direction.”	Picking gift boxes and waving to the other virtual humans should be optional in the game.
	“I like the beautiful village in the virtual environment.”	“The bike runs too fast and it made me dizzy.”	The speed of the bike should be configurable.
		“I tried not to run over the gift boxes on the street.”	Other ways for indicating directions such as turn the upper body should be configurable.
Dancing	“The game is nice. It is much better than the boring exercises we normally do.”	“As the patients were using chairs to support balance, it was difficult to go to the same side for 2 or more side steps.”	For patients who need support for balance, stepping exercise should not require the patient to go to the same side for more than once.
	“The music is good.”	“My movements did not match with the movements of the dancing avatars on the screen.”	Patients should be told that they could clap their hands if they want, but it is not required in the exercise.
	“I really looked forward to dancing and it was even better than I expected.”
	“The game looks easier than it really is.”
Ringing the bell	“It is a nice game.”	“It is a difficult game; hence, patients’ pleasure is lost.”	It is a difficult game for the patients, and it is more suitable for patients who have better balance skills.
	“The rewarding music brings in enjoyment in the player.”	“It is a difficult exercise and patients intended to do a wrong performance.”	Patients should wear relatively tight clothes to ensure more accurate movement recognition by Kinect v2.
		“I was disappointed that the game did not recognize my squats while I was wearing my wide blouse.”
Picking apples	“It is a nice game.”	“ The supporting chairs interfere with Kinect’s recognition of the movements.”	The chairs interfere with tracking for lunges.
		“The game does not respond to my correct movements.”	It is more suitable for patients who are at a later stage of their rehabilitation, that is, patients who can do lunges without balance support.
Football playing	“It is a very useful game for balance training, and it reacts very well to the movements of the player.”	“Patients intended to shoot the ball.”	To reduce cognitive load, let the patient play the game by doing back kicks using their left and right legs alternatively.
	“It is a great game. It made me feel like that I was playing a real football game.”	“It is difficult for me to pay attention to the arrows indicating which leg I should use.”	Instructions should tell the patients that they do not have to shoot the ball.
Fishing	“It is a nice game. I had a feeling that I had a real therapy.”	“I focused on the timer, and the virtual environment was not noticeable for me.”	Different types/sizes of fish need to be created in the game.
	“This game would help a lot in my rehabilitation.”	“All the fishes looked similar. It would be nice if I could catch a different fish.”
	“The virtual environment is beautiful and I like it a lot!”
General comments	“Playing games distracted patients’ attention from exercise and pain.”	“Some patients were unsure of what action was supposed to take place at a particular time. When the patients fail in doing the exercise successfully, they do not get feedback on how to do it correctly.”	Real-time feedbacks on how far the patients are away from the required range of motion should be provided on the screen when the patients are performing the exercises.
	“You can use the game for fun besides the physiotherapy.”	“You have to be clever enough to play the games as it requires paying attention to multiple things at the same time.”	To satisfy personal preferences, interfaces and virtual environments should be configurable to meet the needs of different cognitive challenges.
	“ Patients have enjoyment and they can exercise by their own quickly by using the exercise games.”	“I am very smart, so the game could be made slightly more difficult for me.”
	“These are very nice and useful games and I would like to play them again.”
	“You could play the game at home, but you would still need the physiotherapists’ feedback on how well you are doing with your rehabilitation by using the games.”
	“It is good to receive feedback on the exercises from the games. It prevents you from doing the exercises in the wrong way.”
	“After you get used to playing the exercise games, you have a lot of fun.”