Table 5.

Biomechanics changes produced by articles that provided feedback based on PPA.

ID	Parameter of Change	PPA	VALR	VILR	VIP	Ankle Angle	Comments
[65]	PPA 50%	31% R: 22%	18% R: 6%	19% R: 9%		↓ 200%; ↓ FStrike angle 44%	R: 1 month
[66]	PPA 50%	48% R: 44%	32% R: 27%	34% R: 30%			R: 1 month
[68]	PPA 50%	17–60%	16–39%	15–39%	10–30%		Results were given as a tendency. Values were analyzed in each participant.
[69]	PPA 50%	18.9%; R: 21.2%					R: 1 week
[71]	PPA 20% (cognitive load)	41%	24%	18%
[61]	PPA 20%	26.4%*	16.40%	17.30%			* Value from the tibia. PPA in the shoe: 40.9%. However, PPA in the shoe was not significantly correlated with VALR and VILR. The measurements registered in the shoe were 4 times higher than in the tibia.
[70]	PPA 15–20%	11%–8%					Values changed across checking points over time—starting in 11% ending in 8%.
[64]	PPA 20% (cognitive load)	33.8%*	25%	22%			* Values from the shoe. PPA in the tibia: 10%; post feedback: 21.5%, but there was no significant correlation with VALR and VILR.
[67]	↑Speed 120% and free ↓ PPA	16%; R: 16%					R: 1 month. Significant changes observed from the 5th session. Complementary tables are not given. Retention: 1 month.
[63]	↑&↓Speed 10% and ↓ PPA 20%	R: 35–37%					R: 1 week. Changes observed across all speeds. There was no significant difference between limbs. Training effect did not interact with speed.

Definitions: Decreased (↓); retention (R); foot strike angle–angle between the floor and the foot (FStrike), (*) details about a value in comments.