Implicit video feedback produces positive changes in landing mechanics

Popovic, Tijana; Caswell, Shane V.; Benjaminse, Anne; Siragy, Tarique; Ambegaonkar, Jatin; Cortes, Nelson

doi:10.1186/s40634-018-0129-5

Journal of Experimental Orthopaedics

Table 4 Descriptive statistics for time main effect for all dependent measures at initial contact and peak

From: Implicit video feedback produces positive changes in landing mechanics

	Pretest		PST1		PST2		PST3		Retention
	Mean (SD)	95% CI	Mean (SD)	95% CI	Mean (SD)	95% CI	Mean (SD)	95% CI	Mean (SD)	95% CI
Heel strike
HF (°)	32.8 ± 9.8^a	29.0, 36.6	35.3 ± 9.3	31.7, 38.9	36.9 ± 9.7^a	33.2, 40.6	37.9 ± 11.3^a	33.5, 42.3	34.1 ± 11.5^a	29.7, 38.5
HA (°)	−8.2 ± 4.6	−9.9, −6.5	−7.5 ± 3.8	− 8.9, − 6.1	− 7.9 ± 4.9	−9.7, − 6.1	−8.3 ± 5.3	− 10.3, − 6.3	−8.2 ± 5.1	−10.1, − 6.3
HAM (Nm/kg)	0.09 ± 0.4^a	−0.1, 0.2	−0.08 ± 0.4^a	−0.2, 0.05	−0.02 ± 0.4^a	−0.2, 0.2	0.05 ± 0.3	−0.1, 0.2	0.04 ± 0.3	−0.1, 0.2
KF (°)	−29.2 ± 7.2	−32, − 26.4	−31 ± 7	−33.6, − 28.2	− 31.4 ± 8.4	− 34.6, − 28.1	− 30.8 ± 8.5	− 34, − 27.5	−30.6 ± 9.7	− 34.4, − 26.9
KA (°)	0.7 ± 3.3^a	−0.6, 1.9	0.2 ± 3.5^a	− 1.2, 1.6	1.0 ± 3.2	−0.2, 2.2	1.7 ± 3^a	0.6, 2.9	0.7 ± 3	−0.5, 1.8
KAM (Nm/kg)	0.003 ± 0.2	−0.07, 0.08	−0.05 ± 0.2^a	− 0.1, 0.02	−0.02 ± 0.2	− 0.09, − 0.06	0.01 ± 0.2^a	−0.06, 0.08	0.004 ± 0.2	−0.08, 0.07
Peak
HF (°)	32.8 ± 9.8^a	29.0, 36.6	35.5 ± 9.1	32.0, 38.9	36.6 ± 9.9	32.7, 40.4	37.9 ± 11.3^a	33.5, 42.3	34.3 ± 11.5^a	29.9, 38.7
HA (°)	−5.9 ± 5.3	−7.8, −4	−5.7 ± 4.3	− 7.3, − 4.2	− 5.8 ± 4.9	−7.5, − 4	−6.4 ± 5.7	−8.6, − 4.2	−6.2 ± 6.1	−8.4, − 4.1
HAM (Nm/kg)	−1.2 ± 0.7	− 1.5, − 1	− 1.2 ± 0.6^a	− 1.4, − 1	− 1.1 ± 0.4	−1.3, − 1	−1.1 ± 0.5	− 1.3, − 0.9	−1 ± 0.4^a	− 1.2, − 0.9
KF (°)	− 100.1 ± 13.9^a	−104.7, − 95.6	− 105 ± 15.3	− 110.9, − 99.2	− 105 ± 18.2^a	− 111.8, − 98	−106.1 ± 15.4	− 112, − 100.2	105 ± 15.9^a	− 111, − 99
KA (°)	− 5.0 ± 4.6^a	− 6.7, − 3.2	− 5.7 ± 4.7	− 7.5, − 3.9	− 4.5 ± 3.5	−5.8, − 3.2	−3.2 ± 3.7	− 4.6, − 1.8	− 5.8 ± 3.3^a	− 7.0, − 4.5
KAM (Nm/kg)	− 0.4 ± 0.2	− 0.5, − 0.3	−0.4 ± 0.2	− 0.5, − 0.3	−0.4 ± 0.2^a	− 0.4, − 0.3	−0.4 ± 0.2	− 0.4, − 0.3	−0.3 ± 0.2^a	− 0.4, − 0.3
GRF (N)	2254.9 ± 389^a	2107, 2402	2195.3 ± 352^a	2059, 2332	2093.4 ± 377	1948, 2239	2061.2 ± 370^a	1918, 2205	2049.3 ± 341^a	1919, 2181

Mean ± standard deviation (SD) and 95% confidence intervals (CI)
Hip flexion (HF), hip abduction (HA), hip abduction moment (HAM), knee flexion (KF), knee abduction (KA), knee abduction moment (KAM)
Implicit group (IG), explicit group (EG), Control group (CG)
^aStatistically significant results

Back to article page