Towards a Complete Set of Gym Exercises Detection Using Smartphone Sensors

Table 8

Comparison table for KNN classification results at three body positions (exercisewise) of the only accelerometer and both accelerometer and gyroscope sensors.

Exercise group	Exercise name	Three accelerometers’ accuracy (%)	Three accelerometers + two gyroscopes’ accuracy (%)	Difference (%)	Avg. time (in sec) consumed at exercise, 2 sets each of 10 reps
Unique exercises group	Face pull	100	100	0.0	26.8
	Cable front raise	100	100	0.0	38.5
	Scott curl	98.4	99.2	+0.6	33.2
	Smith machine drag curl	95.6	100	+4.4	30.9
	Triceps with bar	98.1	99.0	+0.9	26.8
	Decline close grip bench press	100	100	0.0	26.3
	Standing cable cross	100	100	0.0	28.7
	Wide grip pull up	99.5	99.7	+0.2	23.8
	T bar rows	100	100	0.0	24.2
	Chin ups	100	100	0.0	23.7
	Adjustable sit-up bench	100	100	0.0	37.9
	Abs wheel	100	100	0.0	46.5
	Roman chairs	100	100	0.0	37.8
	Flutter kick	100	100	0.0	28.7
Common exercises group	Seated barbell shoulder press	100	97.4	−2.6	27.1
	Incline press wide grip	99.1	100	+0.9	26.6
	Standing barbell press	97.0	99.1	+2.9	27.4
	Inclined dumbbell curl	100	100	0.0	37.2
	Barbell preacher curl	99.3	99.3	0.0	34.4
	Triceps press with cable	98.9	99.0	+0.1	29.2
	Machine bench press	100	100	0.0	25.2
	Leg press	100	100	0.0	41.3
	Romanian deadlift	100	100	0.0	37.2
	Barbell squat	100	100	0.0	30.2
	Dips	100	100	0.0	25.3
	Butterfly	99.5	100	+0.5	41.0
Both groups	All exercises average accuracy	99.51	99.72	+0.21	31.4