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 3 Descriptive statistics for all dependent measures by group across testing periods measured at peak

From: Implicit video feedback produces positive changes in landing mechanics

Box Drop-Jump Task	Pretest		Posttest 1		Posttest 2		Posttest 3		Retention
Box Drop-Jump Task	Mean ± SD	95% CI	Mean ± SD	95% CI	Mean ± SD	95% CI	Mean ± SD	95% CI	Mean ± SD	95% CI
HF (°)
IG	32.6 ± 12.4	26, 39.2	35.4 ± 9.6	29.3, 41.4	36 ± 11.9	29.3, 42.6	38.5 ± 13.9	30.8, 46.1	31.8 ± 16.3	24.2, 39.5
EG	31.8 ± 9.6	25.2, 38.4	34.1 ± 10.1	28.1, 40.2	35.9 ± 9	29.2, 42.5	37.3 ± 11.6	29.7, 44.9	34.9 ± 6.8	27.3, 42.5
CG	34.1 ± 7.9	27.5, 40.7	36.9 ± 8.1	30.9, 42.9	37.9 ± 9.6	31.3, 44.6	38 ± 9.3	30.4, 45.6	36.1 ± 10.1	28.5, 43.7
HA (°)
IG	−3.5 ± 4.2	−6.8, −0.2	−3.3 ± 3.4	− 6, −0.7	−4 ± 4.7	−7.1, −1	−5.2 ± 5.7	−9.1, −1.4	− 3.7 ± 4.6	− 7.4, − 0.1
EG	−6.6 ± 5.6	− 9.9, − 3.2	− 7.1 ± 4.7	− 9.8, − 4.5	−8.4 ± 3.5	−11.5, − 5.4	− 7.7 ± 5	−11.5, − 3.9	− 9.5 ± 5	−13.2, − 5.8
CG	− 7.6 ± 5.5	− 10.9, − 4.	− 6.8 ± 4	− 9.5, − 4.2	−4.8 ± 5.7	− 7.9, − 1.78	−6.3 ± 6.7	− 10.1, −2.5	− 5.5 ± 7.2	− 9.2, − 1.8
HAM (Nm/kg)
IG	−1.3 ± 0.7	− 1.7, − 0.9	−1.4 ± 1	− 1.8, − 1	− 1.2 ± 0.5	−1.5, − 0.9	−1.2 ± 0.4	− 1.5, − 0.9	−1.2 ± 0.5	− 1.4, − 0.9
EG	−1.1 ± 0.6	− 1.6, − 0.7	−1 ± 0.2	− 1.4, − 0.6	−1.1 ± 0.4	− 1.3, − 0.8	−1.1 ± 0.6	− 1.4, − 0.8	− 0.9 ± 0.3	−1.1, − 0.7
CG	− 1.2 ± 0.7	−1.7, − 0.8	−1.1 ± 0.4	− 1.5, − 0.7	−1.1 ± 0.4	− 1.4, − 0.8	−1 ± 0.3	− 1.3, − 0.7	−1 ± − 0.3	−1.3 ± 0.8
KF (°)
IG	− 102.3 ± 13.7	− 110.1, − 94.4	− 104.2 ± 14	− 114.3, − 94	−104.8 ± 18.5	− 116.8, − 92.8	−104.8 ± 15.9	− 114.9, − 94.6	− 102.7 ± 16.1	− 113.1, − 92.2
EG	−99.6 ± 8.6	− 107.5, − 91.8	−108.2 ± 16.6	− 118.4, − 98.1	− 109.3 ± 18.5	− 121.3, − 97.3	− 110.1 ± 14.6	− 120.2, − 99.9	−109.5 ± 14.1	− 120, − 99.1
CG	− 98.6 ± 13.5	− 106.4, − 90.7	− 102.7 ± 16.2	− 112.9, − 92.6	− 100.7 ± 18.5	− 112.7, − 88.7	− 103.5 ± 16.4	− 113.6, − 93.3	− 102.80 ± 17.9	− 113.2, − 92.4
KA (°)
IG	−5.1 ± 2.5	−8.2, − 2.1	−4.2 ± 3.4	− 7.3, − 1.1	−5.35 ± 2.0	− 7.7, − 3	− 4.1 ± 4.5	−6.5, − 1.8	− 5.0 ± 3.0	− 7.2, − 2.9
EG	− 5.4 ± 5.5	− 8.4, − 2.3	− 6.7 ± 5.5	−9.8, − 3.6	− 4.4 ± 4.5	− 6.7, − 2.1	−2.1 ± 3.6	− 4.5, 0.3	− 7.1 ± 3.6	−9.3, − 5
CG	−4.4 ± 5.5	− 7.5, − 1.4	−6.2 ± 5.1	−9.3, − 3.1	−3.8 ± 3.7	−6.1, − 1.5	−3.3 ± 2.6	−5.7, − 0.9	−5.2 ± 3.3	−7.3, − 3.1
KAM (Nm/kg)
IG	− 0.4 ± 0.2	− 0.6, − 0.3	− 0.5 ± 0.3	− 0.6, − 0.4	−0.4 ± 0.2	− 0.5, − 0.26	−0.4 ± 0.2	− 0.5, − 0.3	−0.4 ± 0.2	− 0.5, − 0.3
EG	−0.4 ± 0.2	− 0.1, − 0.2	−0.4 ± 0.1	− 0.5, − 0.2	−0.4 ± 0.2	0.5, − 0.3	−0.4 ± 0.2	− 0.5, − 0.3	−0.3 ± 0.1	− 0.4, − 0.2
CG	−0.4 ± 0.3	− 0.5, − 0.3	−0.4 ± 0.1	− 0.5, − 0.3	−0.4 ± 0.2	− 0.5, − 0.3	−0.4 ± 0.1	− 0.5 -0.2	−0.3 ± 0.1	− 0.4, − 0.3
vGRF (N)
IG	2162.9 ± 436	1907.4, 2418.4	2212.2 ± 441	1975.5, 2448.8	2075.2 ± 473	1822.6, 2327.9	2059.8 ± 398	1811.5, 2308.2	2093.5 ± 404	1865.3, 2321.6
EG	2239.7 ± 304	1984.2, 2495.2	2194.7 ± 308	1958.1, 2431.4	2140.3 ± 338	1887.6, 2392.9	2091.9 ± 361	1843.5, 2340.3	2030.8 ± 340	1802.7, 2258.9
CG	2362.1 ± 427	1984.2, 2495.2	2179 ± 331	1942.3, 2415.6	2064.8 ± 342	1812.2, 2317.4	2031.8 ± 388	1783.4, 2280.2	2023.8 ± 303	1795.7, 2251.9

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)

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