Did PA really jog the mind of study participants?
Our second objective was to examine the moderating
or mediating effect of PA on the cognitive vitality of
seniors participating in the program. Contrary to what
the literature had led us to anticipate [11, 65, 66, 68-
70], neither of these two effects were observed. As far
as the moderating effect was concerned, participants
with a higher level of PA (in terms of volume,
frequency and variety) gained no greater benefit from
the intervention in cognitive terms than those who
were less active at the start of the program. The short
period for the CHAMPS measurement (one month)
could also have led to an exaggeration or
minimization of certain individuals’ PA practice at the
start of the study, and did not reflect their cumulative
practice in recent years, or over the course of their
life. Our results are similar to those of Sawatzky [70],
who has also worked with this type of self-reported
data to measure the impact of PA on the health of
older adults. Sawatzky also makes similar
observations on the disadvantages of using this type of
data for measuring moderating or mediating effects.
Did PA really jog the mind of study participants?Our second objective was to examine the moderatingor mediating effect of PA on the cognitive vitality ofseniors participating in the program. Contrary to whatthe literature had led us to anticipate [11, 65, 66, 68-70], neither of these two effects were observed. As faras the moderating effect was concerned, participantswith a higher level of PA (in terms of volume,frequency and variety) gained no greater benefit fromthe intervention in cognitive terms than those whowere less active at the start of the program. The shortperiod for the CHAMPS measurement (one month)could also have led to an exaggeration orminimization of certain individuals’ PA practice at thestart of the study, and did not reflect their cumulativepractice in recent years, or over the course of theirlife. Our results are similar to those of Sawatzky [70],who has also worked with this type of self-reporteddata to measure the impact of PA on the health ofolder adults. Sawatzky also makes similarobservations on the disadvantages of using this type ofdata for measuring moderating or mediating effects.
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