Changes in the aerobic capacity and body composition in obese boys after reduction

1965 ◽  
Vol 20 (5) ◽  
pp. 934-937 ◽  
Author(s):  
ŠtĚpánka Šprynarová ◽  
Jana Pařízková

Seven obese boys submitted themselves to a 7-week regimen of dietary restriction and regular exercise. Measurements were made at the beginning and end of the period. A significant drop in body weight was achieved by reduction of adipose tissue and also of lean body mass (LBM). The ratio of LBM to body weight increased. These changes were associated with significant drop of maximum oxygen consumption. The increase of the Vo2 max per kilogram of body weight and the drop of the Vo2 max per kilogram of LBM were not significant. Between the decrease of LBM and the drop of Vo2 max there exists a significant negative relationship; and between the decrease of LBM and the rise of the Vo2 max per kilogram of body weight, a significant positive relationship. The decrease of Vo2 max in these boys was not considered due to deteriorated circulatory or respiratory function but to changes in body composition. maximum O2 consumption; body weight reduction; lean body mass Submitted on February 17, 1964

2016 ◽  
Vol 34 (4_suppl) ◽  
pp. 89-89 ◽  
Author(s):  
Kenki Segami ◽  
Toru Aoyama ◽  
Yukio Maezawa ◽  
Kazuki Kano ◽  
Tsutomu Sato ◽  
...  

89 Background: Body weight, especially lean body mass, significantly reduces after gastrectomy for gastric cancer due to surgical invasion, reduced food intake, or decreased mobility, which could decrease quality of life and toxicity / compliance of adjuvant chemotherapy. These risks might be high especially in the elderly gastric cancer patients. However, it remains unclear whether changes of weight and body composition are different between the elderly and the non-elderly. Methods: This retrospective study examined patients who underwent curative surgery for gastric cancer between June 2010 and March 2014. Body weight and composition were evaluated by a bioelectrical impedance analyzer within 1 week before surgery (first measurement), at 1 week after surgery (second measurement), at 1 month after surgery (third measurement), and at 3 months after surgery (forth measurement). Patients were classified to the elderly (> 75 years) and the non-elderly ( < 75 years). Results: Four-hundred forty three patients (100 for the elderly and 343 for the non-elderly) were entered in the present study. Patients backgrounds, surgical factors, clinicopathological factors, surgical complications and adjuvant chemotherapy were not significantly different between the two groups. %Body weight loss until 1week, 1month, 3 months after surgery, defined as the proportion of the difference between 1st measurement and each measurement after surgery against 1st measurement, was 3.3%, 6.6%, and 9.7%, respectively in the elderly and 3.7%, 5.4%, and 8.2%, respectively in the non-elderly with significant difference (p = 0.05, 0.01, and 0.01, respectively). %Lean body mass loss until 1 week, 1 month, 3 months after surgery was 3.2%, 5.6%, and 6.1%, respectively in the elderly and 3.2%, 4.5%, and 4.2%, respectively in the non-elderly with p value of 0.36, 0.08, and 0.01, respectively. %Fat loss was not significantly different between the two groups at any time. Conclusions: Decreases in body weight and lean body mass after gastrectomy were more serious in the elderly patients as compared with the non-elderly. Surgical indication for the elderly must be carefully determined considering the risk and the benefit.


2014 ◽  
Vol 5 (1) ◽  
pp. 26-34
Author(s):  
Saha Sukanta

Abstract The aim of this study was to identify the effect of somatotype and body composition variables on leg explosive power of college level men students. The sample consisted of 500 young college students, divided into two groups: athletes (N= 250) undergoing Bachelor of Physical Education course whose mean age 23.86 ± 0.36 years; and non-athletes (N= 250) college students who do not take part regular physical activities and mean age 22.16 ± 0.88 years. The somatotype was assessed using the Heath & Carter method. Assessing body composition of the subject various anthropometric measurements were taken. Sargent vertical jump test was used to measure leg explosive power. The measures were compared between the two groups using the Student t-test for independent samples. The two groups differed significantly (p≤0.01) in terms of body weight, % body fat, lean body mass, % skeletal muscle mass and somatotype. The findings of the present study showing that athlete have higher mean values in leg explosive power (p≤0.01) than non-athlete. The leg explosive power was positively significantly (p≤0.01) correlated with % skeletal muscle mass, lean body mass, mesomorphy and ectomorphy components of somatotype; on the other hand body weight, height, % body fat, body surface area and endomorphy component of somatotype significantly (p≤0.01) negatively correlated. In conclusion, somatotype and body composition variables are important factors in determining leg explosive power.


2018 ◽  
Vol 1 (4) ◽  
Author(s):  
Yihao Lv

Objective The research took the bicyclists in Zhejiang for preparing of the Thirteenth National Games in winter training as the subjects. Through physiological and biochemical index of testing during the winter training, we attempted to find out some rules or problems by exploring the characteristics of their training during winter training, Reached on body function and the training intensity of athletes for effective monitoring and adjustment effect during winter training, and to provide a reference for the development of scientific in bicycle training. Methods During the long term bicycle training, some physical fitness evaluation indices includingVO2max,anaerobic power,body composition,Hb,Bun,CK,T and NEUT% were tested and analyzed systematically. Master the bike athletes body function changes during the winter training, and discuss the relationship between these indexes and body function condition. Results VO2 max, VO2 max relative value almost no change during the winter training; The Large Anaerobic work, 30s average anaerobic work and an body composition indicators no significant difference (p < 0.05), but had a significant change. Hb, Bun, CK,T,NEUT% based standard value in the normal range, throughout the winter training period, Hb, BUN and CK, T, NEUT % has experienced cyclical changes along with the change of sports load: Hb, T at the beginning of the winter training has a downward trend, CK and NEUT % in the early part of the winter training has a rising trend, but as for the winter training gradually restored, BUN rising during the winter training, two weeks before the end of winter training to get down. Conclusions 1, the pros and cons of aerobic capacity is not the main factors influencing the cycling short athlete special performance, but of eliminating anaerobic lactic acid after training to play an active role, aerobic ability training should be strengthened. 2, anaerobic metabolism energy is the important factors that affect cycling short athlete sport result, peak power and 30s average power to scientific evaluation of the athlete's training effect. 3, decreased body fat percentage and lean body mass increase, to improve the athlete special scores play a positive role. 4, during the winter training athletes Hb, CK, T, NEUT % changes over motion load, NEUT % can be used as auxiliary training monitoring indexes of female athletes on the biochemical indexes of the sensitivity is higher than male athletes. 5, in the case of lean body mass is not fall, blood urea to maintain at a high level of cycling short athletes may not bring much impact performance. 6, Because of the mobilization can bear the load and strength are not the same, the same load and intensity produced by the reflect function will not the same, further analysis is needed to combined with physiological and biochemical indexes and individual training plan situation carries on the comprehensive consideration, so as to improve the accuracy of measurement analysis.


Nutrients ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 3122
Author(s):  
Eduard Isenmann ◽  
Joshua Dissemond ◽  
Stephan Geisler

The number of people suffering from being overweight or obese has risen steadily in recent years. Consequently, new forms of nutrition and diets were developed as potential solutions. In the last years, the time-restricted feeding and continuous energy restriction via macronutrient-based diets were increasingly popular. Both diets were exclusively studied separately. A comparison of the two diets for people with a high body mass index despite regular physical activity has not yet been studied in detail. Therefore, this study aimed to compare the effects of these two diets on body composition and adherence. For this study, a total of 42 subjects (m = 21, f = 21) with a BMI above 25 were recruited from a local fitness gym. After a two-week familiarisation period, one of the two diets was followed over 14 weeks. Dietary behaviour was monitored throughout the period with a food diary. The primary measurement parameters were body weight, lean body mass, fat mass, body mass index, and waist and hip circumference. In addition, adherence was assessed and calculated by food diary and questionnaire. In total, the data of 35 participants (m = 14, f = 21) were analysed. Significant reductions in body weight, fat mass, body mass index, and waist and hip circumference were observed in both groups (p < 0.05). No significant change could be observed in lean body mass in either category. No group and gender differences were detected in any of the primary parameters. For the secondary parameters, a significantly higher adherence was observed in the time-restricted feeding group (p < 0.05). In addition, it can be assumed that an adherence of 60–70% cannot lead to positive changes in body composition. In conclusion, there were no differences between the two diets on the primary parameters. However, it seemed that time-restricted feeding can be better implemented in everyday life, and an adherence of more than 70% is required for both diets to prove effective.


2020 ◽  
Vol 13 (1) ◽  
pp. 114-119
Author(s):  
Maryam Hadizadeh ◽  
Wee Yet Gan ◽  
Hamidreza Mohafez ◽  
Yasuhiro Sugajima

Background: Resistance training (RT) has been established as the most efficient approach for lean body mass maintenance required for preserving a sufficiently high metabolism during weight loss. Objective: This study aimed to evaluate the impacts of the ketogenic diet (KD) and regular diet (RE) in combination with 8-week resistance exercise (RT), on body weight, body fat mass (BFM), and lean body mass (LBM) of untrained individuals. Methods: Twenty untrained participants were randomly assigned to the RE+RT and KD+RT as control and experimental groups, respectively. Sixty to ninety minutes of diversified resistance exercise were performed by both groups, three sessions weekly, and diet was self-administered with a recommended daily energy and protein intakes. Body composition was measured using a Bioelectrical Impedance Analyzer. One-way Analysis of Covariance (ANCOVA) was applied to analyze the data. Results: The results showed a greater post-intervention adjusted mean for body weight and LBM in the normal dietary group in comparison with the experimental group. After controlling for baseline measurements, there was a statistically significant difference in body weight (p < .0005) and BFM (p =.001) between groups. Conclusion: Resistance training along with a ketogenic diet may decrease BFM without notable changes in LBM, whilst RT on a normal diet might increase LBM without remarkably influencing BFM.


Blood ◽  
2005 ◽  
Vol 106 (11) ◽  
pp. 1433-1433
Author(s):  
Donald D. Cilla ◽  
Jodi L. Gutierrez ◽  
Robert A. Femia ◽  
Lynn D. Kramer ◽  
Christine Wanke

Abstract BACKGROUND: MA-CS is a new NanoCrystal® technology formulation of megestrol acetate that is bioavailable in the fasted state, which may provide benefit in the treatment of UWL in HIV patients. METHODS: 63 patients with HIV-associated UWL (weight loss to 90% of the lower limit of ideal body weight) were recruited from South Africa, India and the US and then randomized to receive MA-CS (575 mg/5 mL) or MA-OS (800 mg/20 mL) once-daily for 12 weeks in a randomized, open-labeled, multi-center, pilot proof-of-principle study (sample size determined empirically). Patients had weight, body composition (bioimpedance analysis - BIA), and anthropometric measurements obtained at baseline and weekly thereafter, except BIA which was measured at 6 and 12 weeks. Weight changes were compared using the Wilcoxon Rank Sum test. RESULTS: The demographics were comparable between the two groups. The mean weight change from baseline to Week 12 for MA-CS was 5.4 kg (55.6 kg to 61 kg, 10% of baseline body weight). The mean weight change from baseline to Week 12 for MA-OS was 3.5 kg (54.4 kg to 57.9 kg, 6% of baseline body weight). Differences from baseline, in the mean changes in weight, were observed as early as Day 3 (p=0.024) for MA-CS, however no increase was noted until the second week for MA-OS. Similar between group differences were noted consistently at the weekly assessment intervals until week 12 (p= 0.024). Of these weight changes, lean body mass accounted for ~40% of the increase in both treatment groups (MA-CS was ~5% greater than MA-OS). Of the anthropometric measures, the mean triceps skin fold increased by ~36% at Week 12, relative to baseline, in both MA-CS and MA-OS treatment groups. Other anthropometric changes were all smaller (less than 7%) and comparable between treatments. The types and incidence rates of adverse events were similar between MA-CS and MA-OS. CONCLUSIONS: Both products were successful at increasing body weight. There was a greater and more rapid mean change from baseline in the weight gain for MA-CS than MA-OS. The observed weight changes reflected increases in both lean body mass and body fat. MA-CS had a greater change in lean body mass. This trial supports the principle that improved bioavailability of megestrol acetate in the fasted state with MA-CS may be associated with faster time to onset of changes in body weight.


2020 ◽  
pp. 1-9 ◽  
Author(s):  
M. E. Ragi ◽  
N. El-Helou ◽  
C. El-Mallah ◽  
A. Eid ◽  
O. A. Obeid

Abstract Sweetened beverages are mainly consumed cold and various processes are activated in response to external temperature variations. However, the effect of internal temperature variations through the ingestion of cold beverages is far from clear. Two experiments were conducted to investigate the effect of beverage temperature on body composition. Sprague–Dawley rats (5–6-week-old males) had free access to food and beverage for 8 weeks. Energy intake, body weight and body composition were monitored. In Expt 1, two groups of rats (n 9) consumed water at room temperature (NW about 22°C) or cold (CW about 4°C). In Expt 2, rats were offered room-temperature (N) or cold (C) sweetened water (10 % sucrose CSu (n 7) and NSu (n 8); or 0·05 % acesulfame K CAk (n 6) and NAk (n 8)) for 12 h, followed by plain water. Our results show that in Expt 1, CW had higher lean body mass (P < 0·001) and lower body fat gain (P = 0·004) as compared with NW. In Expt 2, body weight (P = 0·013) and fat (P ≤ 0·001) gains were higher in the non-energetic sweetened groups, while lean body mass was not affected by the type of sweeteners or temperature. In conclusion, cold water ingestion improved lean body mass gain and decreased fat gain because of increased energy expenditure, while non-energetic sweetener (acesulfame K) increased body fat gain due to improved energy efficiency. Internal cold exposure failed to increase energy intake in contrast to that of external cold exposure.


Author(s):  
Rien Hoge ◽  
Suzan Detert Oude Weme ◽  
Walter Vervenne ◽  
Inge van Berlo - van de Laar ◽  
Carla van Herpen ◽  
...  

Aim: In our study we examined whether anthropometric and body composition parameters, i.e. body surface area (BSA), lean body mass (LBM) and total body weight (TBW), are correlated with docetaxel clearance and exposure. In addition, LBM, TBW and a fixed dose were compared to BSA as dosing parameters for dose individualisation of docetaxel. Methods: Thirty-six patients affected by breast or castration-resistant prostate carcinoma receiving docetaxel chemotherapy entered the study. LBM was measured by a Dual Energy Xray Absorptiometry (DEXA) scanner before treatment. Blood samples were collected up to 180 minutes after dosing to analyse docetaxel concentrations and to determine individual pharmacokinetic (PK) parameters. Results: No significant correlations were found between the docetaxel pharmacokinetic parameters clearance and volume of distribution and the anthropometric and body composition variables BSA, LBM and TBW. AUC was significantly but poorly correlated with BSA (r=0.452 [p=0.016]) and with TBW (r=0.476 (p=0.011]). The Mean Absolute Percentage Error and Mean Error of simulated dosing based on LBM and fixed dosing ME were not significant different compared to BSA. For TBW, only the MAPE of dosing was significant higher compared to BSA (24.1 vs. 17.1, P=0.001). Conclusion: There is no correlations between docetaxel pharmacokinetics and the anthropometric and body composition variables BSA, LBM and TBW. Dose individualisation of docetaxel based on LBM or TBW or fixed dosing cannot be recommended over BSA based dosing.


Author(s):  
Carla El-Mallah ◽  
Marie-Elizabeth Ragi ◽  
Nehmat El-Helou ◽  
Omar Obeid

<b><i>Introduction:</i></b> Humans are known to adapt to external temperature variations by altering energy intake, expenditure, and body fat storage for insulation [<xref ref-type="bibr" rid="ref1">1</xref>, <xref ref-type="bibr" rid="ref2">2</xref>]. However, it is not clear whether the temperature of ingested water would induce such effects. Similarly, the involvement of the temperature of the ingested beverage has not been addressed in terms of body weight changes [<xref ref-type="bibr" rid="ref3">3</xref>]. <b><i>Objectives:</i></b> This study was to investigate the effect of the ingestion of plain or sweetened water with varied temperatures on growth measures of rats. <b><i>Methods:</i></b> Approval was obtained from the Institutional Animal Care and Use Committee of the American University of Beirut. After a 1-week adaptation period, 5- to 6-week-old male Sprague-Dawley rats were randomly divided into their respective experimental groups, housed individually (22 ± 1°C, reverse light cycle 12:12 h dark/light, light off at 10:00 a.m.) with free access to food and beverage for 8 weeks. <b><i>Experiment 1 (Plain Water):</i></b> Two groups of rats (<i>n</i> = 9) consumed room-temperature [∼22°C] (NW) or cold [∼5°C] (CW) water. <b><i>Experiment 2 (Sweetened Water):</i></b> Four groups of rats were offered sweetened water for 12 h, followed by plain water; (1) 10% sucrose + cold temperature (CS, <i>n</i> = 7), (2) 10% sucrose + room temperature (NS, <i>n</i> = 8), (3) 0.05% acesulfame K + cold temperature (CA, <i>n</i> = 7), and 4) 0.05% acesulfame K + room temperature (NA, <i>n</i> = 8). Food and beverage intake, body weight, and body composition were monitored using NMR minispec (LF110 Body Composition Analyzer, Bruker, USA) and energy expenditure was calculated based on the equation developed by Ravussin et al. [<xref ref-type="bibr" rid="ref4">4</xref>]. Significance was set at a <i>p</i> value &#x3c;0.05. <b><i>Results:</i></b> Experiment 1: Body weight changes were similar between groups (Fig. <xref ref-type="fig" rid="f01">1</xref>-Exp 1a). In the CW group, lean body mass (%) was significantly higher, while body fat (%) was lower than the NW (Fig. <xref ref-type="fig" rid="f01">1</xref>-Exp 1b, c). These changes may relate to the calculated total energy expenditure [NW: 66.73 ± 4.49 kcal/day and CW: 73.75 ± 3.92 kcal/day) (<i>p</i> value = 0.003) since energy intake (NW: 89.97 ± 7.63 kcal/day vs. CW: 93.29 ± 6.26 kcal/day, <i>p</i> value = 0.329) was similar between groups. Experiment 2: Body weight of the CA group was higher than that of the other groups (Fig. <xref ref-type="fig" rid="f01">1</xref>-Exp 2a). Lean body mass (%) of the sucrose-sweetened water groups (Fig. <xref ref-type="fig" rid="f01">1</xref>-Exp 2b, c) was significantly higher, while body fat (%) was lower than that of the non-caloric sweetened water groups; these were not affected by the temperature of the beverage. Those variations are mostly explained by the differences in energy expenditure (<i>p</i> value temperature × sweetener = 0.015), as energy intake was not significantly different between groups. <b><i>Conclusion:</i></b> Cold plain water decreased body fat and increased lean body mass with no effect on total body weight. Sucrose-sweetened water had a better impact on body composition irrespective of the temperature of the beverage. The beneficial effects are mainly due to increased energy expenditure rather than variations in energy intake. Thus, the energy cost of warming the water seems to have been derived from an increase in fat oxidation.


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