TY - JOUR
T1 - Feedback Leads to Better Exercise Quality in Adolescents with Patellofemoral Pain
AU - Riel, Henrik
AU - Matthews, Mark
AU - Vicenzino, Bill
AU - Bandholm, Thomas
AU - Thorborg, Kristian
AU - Rathleff, Michael Skovdal
PY - 2018/1/1
Y1 - 2018/1/1
N2 - Purpose: Adolescents with patellofemoral pain (PFP) do not comply with their exercise prescription, performing too few and too fast repetitions, compromising recovery. We investigated if real-time feedback on contraction time would improve the ability of adolescents with PFP to perform exercises as prescribed. Methods: A randomized, controlled, participant-blinded, superiority trial with a 6-wk intervention of three weekly sessions of three elastic band exercises was undertaken. Forty 15- to 19-yr-old adolescents with PFP were randomized to real-time BandCizeri-iPad feedback on contraction time or not by a physiotherapist. The primary outcome was the mean deviation from the prescribed contraction time of 8 s per repetition. Secondary outcomes included isometric hip and knee strength, Kujala Patellofemoral Scale, and Global Rating of Change. Results: The mean deviation from prescribed 8 s per repetition contraction time was 1.5 T 0.5 s for the feedback group, compared with 4.3 T 1.0 s for the control group (mean difference: 2.7 s (95% confidence interval = 2.2-3.2, P G 0.001). On the basis of total contraction time during the intervention, the feedback group received 35.4% of the prescribed exercise dose whereas the control group received 20.3%. Isometric hip and knee strength increased significantly more in the feedback group compared with controls (mean difference = 1.35 NIkgj1, 95% confidence interval = 0.02-2.68, P = 0.047). There were no significant differences in Kujala Patellofemoral Scale and Global Rating of Change between groups, but the study was not powered for this. Conclusion: Realtime feedback on contraction time resulted in the ability to perform exercises closer to the prescribed dose and also induced larger strength gains.
AB - Purpose: Adolescents with patellofemoral pain (PFP) do not comply with their exercise prescription, performing too few and too fast repetitions, compromising recovery. We investigated if real-time feedback on contraction time would improve the ability of adolescents with PFP to perform exercises as prescribed. Methods: A randomized, controlled, participant-blinded, superiority trial with a 6-wk intervention of three weekly sessions of three elastic band exercises was undertaken. Forty 15- to 19-yr-old adolescents with PFP were randomized to real-time BandCizeri-iPad feedback on contraction time or not by a physiotherapist. The primary outcome was the mean deviation from the prescribed contraction time of 8 s per repetition. Secondary outcomes included isometric hip and knee strength, Kujala Patellofemoral Scale, and Global Rating of Change. Results: The mean deviation from prescribed 8 s per repetition contraction time was 1.5 T 0.5 s for the feedback group, compared with 4.3 T 1.0 s for the control group (mean difference: 2.7 s (95% confidence interval = 2.2-3.2, P G 0.001). On the basis of total contraction time during the intervention, the feedback group received 35.4% of the prescribed exercise dose whereas the control group received 20.3%. Isometric hip and knee strength increased significantly more in the feedback group compared with controls (mean difference = 1.35 NIkgj1, 95% confidence interval = 0.02-2.68, P = 0.047). There were no significant differences in Kujala Patellofemoral Scale and Global Rating of Change between groups, but the study was not powered for this. Conclusion: Realtime feedback on contraction time resulted in the ability to perform exercises closer to the prescribed dose and also induced larger strength gains.
KW - Journal Article
U2 - 10.1249/MSS.0000000000001412
DO - 10.1249/MSS.0000000000001412
M3 - Journal article
C2 - 28846562
SN - 0195-9131
VL - 50
SP - 28
EP - 35
JO - Medicine and Science in Sports and Exercise
JF - Medicine and Science in Sports and Exercise
IS - 1
ER -