Acute effects and their reliability of aerobic exercise on executive function in seniors

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Background: Aging is accompanied by a decline of executive function. Aerobic exercise training causes moderate improvements of cognitive domains (i.e. attention, processing, executive function, memory) in seniors. Most conclusive data are obtained from studies with dementia or cognitive impairment. However, confident detection of exercise training effects requires ad-equate between-day reliability and low day-to-day variability obtained from acute studies, re-spectively. These absolute and relative reliability measures have not yet been examined for a single aerobic training session in seniors. Methods: Twenty-two healthy and physically active seniors (age: 69 ± 3 y, BMI: 24.8 ± 2.2, VO2peak: 32 ± 6 mL/kg/bodyweight) were enrolled in this randomized controlled cross-over study. A repeated between-day comparison [i.e., day 1 (habituation) vs. day 2 & day 2 vs. day 3] of executive function testing (Eriksen-Flanker-Test, Stroop-Color-Test, Digit-Span, Five-Point-Test) before and after aerobic cycling exercise at 70% of the heart rate reserve [0.7 × (HRmax – HRrest)] was conducted. Reliability measures were calculated for pre, post and change scores. Results: Large between-day differences between day 1 and 2 were found for reaction times (Flanker- and Stroop Color testing) and completed figures (Five-Point test) at pre and post testing (0.002<p<0.05, 0.16<ɳp²<0.38). These differences notably declined when comparing day 2 and 3. Absolute between days variability (CoV) dropped from 10 to 5% when comparing day 2 vs. day 3 instead of day 1 vs. day 2. Also ICC ranges increased from day 1 vs. day 2 (0.65 < ICC < 0.87) to day 2 vs. day 3 (0.40<ICC<0.93). Interestingly, reliability measures for pre-post change scores were low (0.02<ICC<0.71). These data did not improve when comparing day 2 with day 3. During inhibition tests, reaction times showed excellent reliability values compared to the poor to fair re-liability of accuracy. Conclusion: Notable habituation to the whole testing procedure should be considered as it increased the reliability of different executive function tests. Change scores of executive function after acute aerobic exercise cannot be detected reliably. Large intra- and inter-individual of responses to acute aerobic exercise in seniors can be presumed.
Titel10th Conference of the Swiss Society of Sport Science : Performance in Sports
Herausgeber/inSportwissenschaftliche Gesellschaft der Schweiz
PublikationsstatusVeröffentlicht - 02.2018
VeranstaltungJahrestagung der Sportwissenschaftlichen Gesellschaft der Schweiz (SGS) - Magglingen, Schweiz
Dauer: 08.02.201809.02.2018
Konferenznummer: 10

ID: 3407437

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