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Influences of Visual Kinematic Feedback on Neuromuscular Performance during Resistance Training in Healthy Older Adults
Location: 58
Mentor: Dr. Joseph Signorile
To determine the impact of visual kinematic feedback on leg-press (LP) and chest-press (CP) peak power (PP) and average power (AP) using HUR (HUR Inc, Park Ridge, IL, USA) pneumatic resistance training machines. 28 older adults (73.1 ± 6.7y) completed two training sessions separated by 48hrs of rest on the HUR LP and CP. During one session, subjects were provided kinematic feedback on the HUR tablets. In the other session, subjects were not provided with feedback on training. Both groups completed three sets of eight repetitions on each machine separated by a one-minute rest. Separate 2 x 3 (condition x set) repeated measures ANOVAs and subsequent pairwise comparisons revealed significantly greater power with feedback (Mdiff ± SE = 21.18±6.35; p=.003). A main effect for set was observed for LP-PP (F (2,25) = 17.701, p<.001) indicating significant increases in PP from set 1-2, 2-3, and 1-3. Pairwise comparisons also revealed significantly greater power with feedback for LP-AP (23.50±6.65W; p=.002) and CP-AP (10.58±3.57W; p=.007). A main effect for set was observed for LP-AP (F (2,25) = 13.568, p<.001) with pairwise comparisons revealing significant increases in AP from sets 1-2, 2-3, and 1-3. Visual kinematic feedback in the form of power bars is a viable tool for optimizing neuromuscular performance in older adults. Further, greater power outputs in the subsequent LP sets for both PP and AP suggest a level of neuromuscular facilitation in the lower limbs, which may warrant sufficient warm up sets to maximize power during resistance training.
