Be Active: Reduce Diabetes Risk, Live Longer

Jonker JT,De Laet C,Franco OH, Peeters A, Mackenbach J, Nusselder WJ. Physical Activity and Life Expectancy With and Without Diabetes. Diabetes Care 29:38-43, 2006

Researchers writing in the medical journal Diabetes Care, examined the relationship between active lifestyle, diabetes, and life expectancy. From the abstract:

OBJECTIVE—Physical activity is associated with a reduced risk of developing diabetes and with reduced mortality among diabetic patients. However, the effects of physical activity on the number of years lived with and without diabetes are unclear. Our aim is to calculate the differences in life expectancy with and without type 2 diabetes associated with different levels of physical activity.

CONCLUSIONS—Moderately and highly active people have a longer total life expectancy and live more years free of diabetes than their sedentary counterparts but do not spend more years with diabetes.

Read the abstract

Walking off Postmenopausal Decreases in bone mineral density, aerobic fitness, muscle strength, and balance

Researchers writing in the medical journal Physical Therapy say that “Menopause may induce a phase of rapid decreases in bone mineral density, aerobic fitness, muscle strength, and balance, especially in sedentary women.”
Asikainen TM, Suni JH, Pasanen ME, Oja P, Rinne MB, Miilunpalo SI, Nygard CH, Vuori IM.

Effect of brisk walking in 1 or 2 daily bouts and moderate resistance training on lower-extremity muscle strength, balance, and walking performance in women who recently went through menopause: a randomized, controlled trial. Phys Ther. 2006 Jul;86(7):912-23.

From the article abstract:
BACKGROUND AND PURPOSE: Menopause may induce a phase of rapid decreases in bone mineral density, aerobic fitness, muscle strength, and balance, especially in sedentary women. The purpose of this study was to examine the effects and feasibility of an exercise program of 1 or 2 bouts of walking and resistance training on lower-extremity muscle strength (the force-generating capacity of muscle), balance, and walking performance in women who recently went through menopause.

SUBJECTS AND METHODS: The subjects were 134 women who recently went through menopause. The study was a 15-week, randomized, controlled trial with continuous and fractionated exercise groups. The outcomes assessed were lower-extremity muscle strength, balance, and walking time over 2 km. Feasibility was assessed by questionnaires, interviews, and training logs.

RESULTS: One hundred twenty-eight women completed the study. Adherence to the study protocol was 92%. Both continuous and fractionated exercise groups improved equally in lower-extremity muscle strength and walking time but not in balance. Almost 70% of the subjects considered the program to be feasible. Two daily walking sessions caused fewer lower-extremity problems than did continuous walking.

DISCUSSION AND CONCLUSION: Brisk walking combined with moderate resistance training is feasible and effective. Fractionating the walking into 2 daily sessions is more feasible than continuous walking.

Exercise Frequency in Older Women

Researchers writing in the Archives of Gerontology and Geriatrics say “older women who participate in an exercise program three times a week gain greater functional fitness benefits than those who exercise less frequently.”

Nakamura Y, Tanaka K, Yabushita N, Sakai T, Shigematsu R. Effects of exercise frequency on functional fitness in older adult women. Arch Gerontol Geriatr. 2007 Mar-Apr;44(2):163-73.

From the study abstract: This study evaluated the effects of exercise frequency on functional fitness in older women participating in a 12-week exercise program.

Participants (67.8+/-4.6 years) were divided into three different exercise groups (I, II, and III; n=34) and a control group (Group C; n=11). Group I participated in a 90-min exercise program once a week, for 12 weeks, while Group II attended it twice a week, and Group III attended three times a week.

The exercise program consisted of a 10-min warm-up, 20min of walking, 30min of recreational activities, 20min of resistance training, and a 10-min cool-down.

The following items were measured before and after the program: muscular strength, muscular endurance, dynamic balance, coordination, and cardiorespiratory fitness (6-min walking distance).

Comparisons of baseline and post-intervention measures showed significantly greater improvements in body weight, coordination, and cardiorespiratory fitness for Group III compared to the other groups (p<0.05).

In addition, the greatest improvements in body fat, muscular endurance, and dynamic balance were also observed in Group III (p<0.05). However, no significant differences were found in muscular strength.

Older women who participate in an exercise program three times a week gain greater functional fitness benefits than those who exercise less frequently. In order to improve functional fitness in older women, an exercise frequency of at least three times each week should be recommended.