[Relationships between nutritional status and the effects of exercise training in frail elderly people]

The impact of malnutrition on efficacy of resistance training in community-dwelling older adults

OBJECTIVE

Few studies have focused on the effect of resistance training under conditions of malnutrition in older adults requiring long-term care. The purpose of this study was to investigate the influence of nutritional status in older adults on resistance training-induced changes in physical performance.

METHODS

A total of 91 community-dwelling older adults participated in 24 weeks of resistance training. Participants used the 60% of one repetition maximum for three sets of 10 repetitions for resistance training. Short Physical Performance Battery (SPPB), Mini Nutritional Assessment Short Form (MNA-SF), Barthel Index, and grip strength were measured before and after the resistance training. The participants were classified into three groups according to the MNA-SF score at baseline (0 to 7 as malnutrition group, 8 to 11 as at risk group, and 12 to 14 as well-nourished group).

RESULTS

In comparing the preintervention and postintervention changes in functional fitness of the groups, there was a significant Group × Time interaction for SPPB scores (F = 11.59, p < 0.01), 4-m walk speed (F = 5.87, p < 0.01), and grip strength (F = 3.27, p < 0.05). Multivariate logistic regression analysis showed that well-nourished group was significantly more likely to improvement of physical function (odds ratio 3.08, 95% confidence interval [1.54, 6.15], p < 0.01).

CONCLUSIONS

The results of study revealed that malnutrition was an independent negative factor of effects of resistance training in older adults. These results suggested that effects of resistance training may be affected by the nutritional state.

Exercise intervention implemented by trained volunteers improves health-related quality of life among Japanese community-dwelling older females: an intervention study

[Purpose] This study aimed to evaluate the sustainability and efficacy of exercise intervention, as implemented by professionally trained volunteers, on the health-related quality of life among Japanese community-dwelling older females. [Subjects and Methods] We conducted a non-randomized observational prospective study of a six-month exercise intervention delivered by volunteers or health professionals. Health-related quality of life was scored using the Short Form 36 Health Survey before and after the intervention. Participants were classified into three groups, comprising those with improved health, maintained health, and reduced health. [Results] Among 127 Japanese community-dwelling females aged >65 years, 50 of 62 (80.6%) females involved in the intervention conducted by volunteers, and 55 of 65 (84.6%) females involved in the intervention conducted by health professionals, completed the six-month intervention program. Scoring revealed that interventions by both volunteers and health professionals had a maintaining or improving effect on scores in >70% of participants instead of an expected six-month aging decline. [Conclusion] Exercise intervention by trained volunteers was sustainable and effective for improving the health-related quality of life among Japanese community-dwelling older females. Professionally trained volunteers could benefit communities in helping older persons avoid the need for daily nursing care through promoting health activities.