Physical fitness in obese women

WSTĘP. Celem pracy było porównanie pojemności i wentylacji płuc, częstości rytmu serca i stężenia mleczanów w surowicy u otyłych kobiet w zależności od czasu trwania wysiłku na cykloergometrze. MATERIAŁ I METODY. Badaniem objęto 34 otyłe kobiety [wiek 36,2 ± 13,6 roku; masa ciała 95,5 ± 16,5 kg; wskaźnik masy ciała (BMI, body mass index) 36,0 ± 5,7 kg/m2]. U wszystkich przeprowadzono test wysiłkowy na cykloergometrze, a maksymalny czas jego trwania wynosił 9 minut przy wzrastającym obciążeniu (0-3 minuta - 50 W; 3–6 minuta - 100 W; 6–9 minuta - 150 W) (program Ketler). Czynność serca w czasie testu monitorowano za pomocą pulsoksymetru. Przed testem wykonano badanie spirometryczne. Przed wysiłkiem i po wysiłku oznaczono stężenie mleczanów we krwi. Badane osoby podzielono na 2 podgrupy w zależności od czasu trwania testu wysiłkowego. WYNIKI. W podgrupie kobiet, u których test wysiłkowy trwał powyżej 6 minut zaobserwowano istotnie wyższe wartości tętna w czasie wysiłku, nie stwierdzono natomiast różnic między odsetkiem tętna maksymalnego i wartością maksymalnego poboru tlenu (VO2max, maximum oxygen consumption). Stężenie mleczanów po wysiłku oraz pojemność życiowa płuc (VC, vital capacity) były istotnie wyższe u osób, które osiągnęły wyższe obciążenie. W badanych podgrupach nie wykazano różnic między całkowitą objętością płuc (TLV, total lung volume). WNIOSKI. Wydaje się, że wydolność fizyczna otyłych kobiet bez chorób towarzyszących zależy od stopnia wytrenowania, a takie parametry jak: wiek, masa ciała, wskaźnik BMI, masa tłuszczu, pojemność życiowa płuc, maksymalny pobór tlenu i najwyższe wartości tętna w czasie testu na cykloergometrze nie wpływają na czas trwania testu wysiłkowego.INTRODUCTION. The aim of the study was to compare vital capacity and ventilation, heart rate, aerobic threshold and lactate concentration in obese women in relation to the length of exercise on cycloergometer. MATERIAL AND METHODS. The study involved 34 obese women (age 36.2 ± 13, body weight 95.5 ± 16.5 kg; BMI 36.0 ± 5.7 kg/m2). All subjects performed a cycloergometer stress test (0–3 minutes - 50 W; 3–6 minutes - 100 W; 6–9 minutes - 150 W) (Ketler program). Heart rate during test was recorded using a pulse oximeter. Spirometry was carried out before the test. Lactate concentrations were measured before and after the exercise test. Subjects were divided into two subgroups in relation to the duration of the exercise test. RESULTS. Higher heart rate was observed in the subjects who performed the exercise test longer than 6 minutes. There were no differences in the percentage of maximal heart rate and maximum oxygen consumption (VO2max) between groups. The accumulation of blood lactate during exercise and vital capacity (VC) was greater in the group with higher work load. There were no differences in total lung volume (TLV) in both groups. CONCLUSIONS. Age, body mass, BMI, fat mass, vital capacity (VC), maximum oxygen consumption (VO2max) and the percentage of maximal heart rate seem not to influence the duration of the exercise test’s duration. It seems that physical fitness in obese women depends on the level of training

Posturographic characteristics of the standing posture and the effects of the treatment of obesity on obese young women.

To determine the impact of body weight on quiet standing postural sway characteristics in young women, this research compared spontaneous oscillations of the center of foot pressure (COP) between 32 obese (BMI: 36.4 ± 5.2 kg/m2), and 26 normal-weight (BMI: 21.4 ± 1.5 kg/m2) women and assessed the influence of obesity treatment and body weight reduction on postural sway. Trajectories of the COP were assessed while the subjects were standing quietly with eyes open (EO) and closed (EC). Both in the sagittal (AP) and frontal (ML) planes the sway range, average velocity, and maximal velocity of COP were calculated. Moreover, the total average and maximal velocities were computed. In the obese group, the tests were performed twice-before and after the obesity treatment. A greater (18% in EC) AP sway range and a substantial reduction of ML sway (25% in EO, 22% in EC) were observed in the obese women. The total COP velocities (average and maximal) were decreased in obese women (20% and 20% in EO) as well as the velocities in the frontal plane (EO: 33%, 41%; EC: 34%, 40%). Body weight reduction resulted in significant changes in postural sway. The following parameters increased: ML sway range (28% in EO), average (20% in EO, 16% in EC) and maximal ML (20% in EO) velocities. The results indicate that young obese women in the habitual standing position are characterized by the destabilizing influence of mass in the sagittal plane only in the absence of a visual control. This effect is dominated by the stabilizing mass effect in the frontal plane, which affects overall postural stability when standing. The reduction of body mass enables a decrease in ML static stability, likely due to natural changes in the base of support while standing