Objectives: The aim of the study was to assess the relationship between body composition, nutritional status and physical ability in elderly outpatients.
Method:. In this cross-sectional study, demographic data and medical history were collected from patients aged ≥60 years followed in the Geriatric Outpatient Clinic from October 2010 to February 2014. Body composition was examined using a dual-energy X-ray absorptiometry. Physical performance was assessed by gait speed (GS), Timed Up & Go Test (TUG), Six Minute Walk Test (6MWT). The nutritional status was evaluated using the Mini Nutritional Assessment (MNA) and serum albumin level.
Results: Mean age (± SD) of 76 patients (64.47% men) was 71.93 ± 8.88 yrs. The most common diseases were: hypertension (89.47%), coronary heart disease (81.58%) and chronic heart failure (68.4%). In multiple regression analyses, the factors significantly affecting GS were: age (B = –0.017, p ≤0.0001), good nutritional status (B = 0.038, p <0.01) and percent of lower extremity fat (B = –0.009, p <0.05). Longer TUG time was associated with poorer nutritional status (B = –0.031, p <0.01), older age (B = 0.01, p <0.01) and a higher number of comorbidities (B = 0.034, p <0.05). 6MWT was influenced negatively by age (B = –3.805, p <0.01) and percent of lower extremity fat (B = –2.474, p <0.05).
Conclusions: Age and nutritional status remain a strong determinant of physical fitness deterioration. Different measures of physical performance are influenced by different elements of body composition — no single element of body composition was found determining the deterioration of all assessed parameters of physical fitness.
Identifying the relationship between body composition, nutritional status and physical performance can help elucidate the causes of disability and target preventive measures.

Prevalence of metabolic syndrome (MetS) and its components is a growing issue, including pediatric populations. However, because of many definitions used, it is difficult to assess the true fre-quency of these problems.
The aim of this study was to assess the prevalence of MetS and its components as well as the frequency of problems with inadequate nutritional status among adolescents.
One hundred ninety-six teenagers aged 15–18 years, living in Krakow and its vicinity were examined including measurement of blood pressure, anthropometric parameters and blood levels of cholesterol and glucose.
The prevalence of MetS was low and varied from 0.5% to 2.0% depending on the definition. Based on Cook’s definition of MetS, the most common components were hypertension (12.8%) and hypertriglycer-idemia (12.8%). Improper body weight (based on BMI) was found in 23.5% of adolescents, including 5.1% underweight, and 18.4% overweight or obese. According to the body fat percentage (BF%), 45.8% of the boys were underfat and 6.3% had too much body fat, while only 4% of the girls were below the BF% reference values and 15% above. All girls and 86.5% of boys had too low total body water. In conclusion, the prevalence of metabolic syndrome in population of Krakow adolescents was relatively low, but more than 12% of the adolescents had a hypertension or hypertriglyceridemia. Based on BMI most of adolescents were found to have adequate body weight, but examination of fat content in the body high prevalence of underfat was observed, especially among boys.