Original articleInfluence of Resistance Exercise on Lumbar Strength in Older, Overweight Adults
Section snippets
Inclusion Criteria
Participants must not have been involved in a regular resistance training program for at least 1 year, but may have engaged in low-intensity aerobic training equal to or less than 3 times a week. To be eligible for study participation, subjects underwent a medical examination performed by a physician specializing in geriatric medicine, a resting 12-lead electrocardiogram, and a graded exercise test to their respective symptom-limited maximum. Blood pressure, peak rate of oxygen consumption (Vo2
Participant Characteristics
Characteristics of the experimental groups are found in table 1. The OVW-CON and OVW-RX groups had greater body weights, BMI values, percentage of body fat levels and FFMs than their normal weight comparative controls (P<.05). All other variables did not differ significantly among groups (P>.05).
Overall Muscular Strength
At baseline, 1-way ANOVA revealed that the OVW group had greater upper- and lower-body strength compared with the NOVW group (P<.05; table 2). However, many of these differences disappeared when the
Overview of Main Findings
This investigation examined whether lumbar extension muscle strength deficits were present in overweight compared with normal weight older adults, and examined whether RX was effective in increasing lumbar extension strength in overweight older adults. There were 2 main findings from this study. First, lumbar extensor strength was greater in OVW compared with NOVW persons when expressed in absolute (in newton meters) but similar when expressed in relative (in Nm/kg FFM) terms. Second, RX
Conclusions
OVW persons were found to have greater absolute and similar relative, upper-body, lower-body, and lumbar extension strength at baseline when compared with their NOVW counterparts in this sample. These data also showed that isolated lumbar extension exercise was effective in improving lumbar extensor strength in OVW and NOVW persons. The clinical implication of these data is that exercises that emphasize isolated lumbar extension strengthening with pelvic stabilization should be incorporated
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Supported in part by the National Center for Complementary and Alternative Medicine (NCCAM) (grant nos. T32-AT00052, K30-AT-00060); the contents are solely the responsibility of the authors and do not necessarily represent the official views of the NCCAM, or the National Institutes of Health.
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