Associations of overweight and metabolic health with successful aging: 32-year follow-up of the Helsinki Businessmen Study

Obesity, Even in the Metabolically Healthy, Increases the Risk of Poor Physical Performance: A Cross-Sectional Study of Older People in a Chinese Community

Objective

We examined the association between obesity and physical performance under different metabolic status.

Methods

The sample included 1395 Chinese community-dwelling participants (mean age, 71.88 ± 5.87 years; 40.9% men). Being metabolically healthy was defined as having the presence of < 3 of 5 components of metabolic syndrome (MetS); obesity was defined as having a BMI > 28 kg/m². Participants were divided into four groups based on BMI (non-obese/obese) and metabolic health (healthy/unhealthy). Physical performance was measured by grip strength, 4-m walking speed, and the timed up and go test (TUGT).

Results

After multiple adjustments, compared with metabolically healthy non-obese group, the metabolically unhealthy obese group showed lower relative grip strength, lower 4-m walking speed, and higher TUGT (P all < 0.05), and only relative grip strength of the metabolically healthy obese group was significantly lower than that of metabolically healthy non-obese (P < 0.01). Relative grip strength was negatively associated with impaired fasting glucose (β = −0.071), elevated triglycerides (β = −0.062), abdominal obesity (β = −0.230) and general obesity (β = −0.225) (P all < 0.01). Walking speed and TUGT were only associated with general obesity, rather than other metabolic components. The associations of MetS with physical performance were mainly driven by abdominal obesity.

Conclusion

Even in those who are metabolically healthy, obesity (especially general obesity) increases the risk of poor physical performance. Elderly people with general obesity and MetS, whether in combination or alone, have an increased risk of muscle dysfunction, and that combination produces a higher risk of impaired mobility.

Association of midlife body composition with old-age health-related quality of life, mortality, and reaching 90 years of age: a 32-year follow-up of a male cohort

BACKGROUND

Overweight and obesity increase the risk of morbidity and mortality. The relations between body composition at midlife, health-related quality of life (HRQoL) in old age, and longevity are, however, less studied.

OBJECTIVES

We examined the association of midlife body composition with successful aging, defined as high HRQoL and reaching 90 y of age, during 32 y follow-up.

METHODS

Participants were 1354 men from the Helsinki Businessmen Study, born 1919-1934. In 1985/1986 (mean age: 60 y) various health measurements were performed. Percentages of body fat (BF) and skeletal muscle mass (SM) were calculated using validated formulas (including waist and hip circumferences, weight, and age) and divided into quartiles. In 2000 and 2007 (mean ages: 74 and 80 y, respectively), HRQoL was assessed using RAND-36/Short Form-36 scales. Mortality was retrieved from registers through 2018, and longevity determined by calculating the proportion of participants reaching 90 y. Logistic regression was used to assess ORs with 95% CIs.

RESULTS

Higher SM% at midlife in 1985/1986 was associated (P < 0.05) with higher scores in the RAND-36 scales of physical functioning, role limitations caused by physical health problems, vitality, social functioning, and general health in old age in 2000. In 2007 only the association with physical domain (physical functioning, role limitations caused by physical health problems) remained statistically significant (P < 0.01). BF% quartiles in 1985/1986 were inversely associated with several RAND-36 scales in 2000 and 2007. During the 32-y follow-up, 982 participants died and 281 reached 90 y of age. Being in the highest SM% quartile at midlife increased (adjusted OR: 2.32; 95% CI: 1.53, 3.53; lowest SM% quartile as reference) and being in the highest BF% quartile decreased (OR: 0.43; 95% CI: 0.28, 0.66; lowest BF% quartile as reference) the odds of reaching 90 y.

CONCLUSIONS

Desirable body composition in terms of both fat and skeletal muscle mass at midlife was associated with successful aging in men.This trial was registered at clinicaltrials.gov as NCT02526082.