Effects of Growth Hormone Therapy and Physical Exercise on Anaerobic and Aerobic Power, Body Composition, Lipoprotein Profile in Middle Aged Men

Zając, Adam; Czuba, Miłośz; Poprzęcki, Stanisław; Waśkiewicz, Zbigniew; Cholewa, Jarosław; Pilch, Ján; Chycki, Jakub

doi:10.2478/v10078-010-0033-2

Cited by 12 publications

(25 citation statements)

References 27 publications

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“…Therefore, this training program itself, without a nutrition plan, was not effective to reduce FM or increase FFM. Same result have been found in previous study, where the strength and endurance fitness program without nutritional support was found to be ineffective for composition change in older men population (Kerksick et al, 2009;Zajac, Wilk, Socha, Maszczyk, & Chycki, 2014). CAHCT seemed an insufficient stimulus to evoke muscle hypertrophy and to avoid possible decrease in FFM.…”

Section: Dicussionsupporting

confidence: 84%

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2015

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Abstract:The aim of this study was to find out whether 12 weeks circuit training, which combines hydraulic resistance machines with weight bearing exercises (CAHCT), will change body composition and strength in women and improve their health-related fitness. Nine women (age 36.2 ± 9.97; height 168.3 ± 7.8 cm, weight 78.7 ± 13.3 kg) underwent CAHCT 3 times per week for 12 weeks. Each subject performed a pre-test and post-test, which consisted of the measurement of body composition, maximum isometric strength for knee flexion/extension measured by an isokinetic dynamometer, maximum anaerobic power by the Wingate test and strength endurance of abdominal muscles by the partial curl up test. After 12 weeks of CAHCT no significant changes were found in body composition and in the parameters of isokinetic strength. In case of the Wingate test, peak power and relative peak power per body weight increased significantly (d=0.76 and d=0.58, respectively). Concerning the partial curl-up test, a large effect (d=0.76) indicated a significant change in the test score. The AHCT for women performed for 12 weeks positively influenced the motor component of health-related fitness in women who had not participated regularly in strength training. However, the changes in body composition were not significant.

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Section: Dicussionsupporting

confidence: 84%

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2015

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“…It may be assumed that TT supplementation is not necessarily directly responsible for changes in the lipid and lipoprotein profile. We hypothesize that it is the result of higher resting cocentrations of T and GH, which was also observed in studies by Zając et al (2014). It seems that both GH as well as T have a profound effect on the lipid and lipoprotein profile.…”

Section: Discussionsupporting

confidence: 74%

“…Studies indicate that treatment with recombinant GH in elderly subjects significantly affects body composition (Poprzecki et al, 2005;Zając, Wilk, Socha, Maszczyk, Chycki, 2014). This effect is particularly important in case of increased concentrations of both GH and T (Blackman et al, 2002), which took place in the current study.…”

Section: Discussionsupporting

confidence: 48%

“…Combined treatment with rGH and T affects the decrease in T-Ch and LDL-Ch as well. Research conducted by Zając et al (2014) on a similar group of middle-aged men indicate that injections of T and GH resulted in a decrease of T-Ch, an increase in HDL-Ch, a marked reduction in LDL-Ch. This justifies the assumption that it is the increase in the concentration of T and GH which affects the changes in lipid profile and not the direct effect of TT supplementation.…”

Section: Discussionmentioning

confidence: 92%

“…Steroidal saponin supplementation in men with physiologically reduced concentrations of T and GH may be a reasonable alternative for hormone therapy, and as research indicates an increase in the concentration of T in patients with GHD or impaired secretion of testosterone significantly affects the changes of body composition and improves the physical abilities of the organism (Zając et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Endocrine Responses to Physical Training and Tribulus Terrestris Supplememtation in Middle-Age Men

Wilk

Michalczyk

Chycki

et al. 2016

Central European Journal of Sport Sciences and Medicine

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abstract. The aim of this study was to evaluate the effects of steroidal saponin supplementation on blood concentration of T, GH and IGF-1. The research involved 14 men between the age of 45 and 60 years. The duration of the experiment was 12 weeks. There were two series of laboratory tests. Independent tests were conducted at the beginning and after 12 weeks of the intervention. A two-way repeated measures ANOVA revealed a statistically significant effect of the intervention on the following variables: T-Ch (η 2 = 0.542), HDL-Ch (η 2 = 0.522), LDL-Ch (η 2 = 0.587), T (η 2 = 0.603), IGF-1 (η 2 = 0.512) and GH (η 2 = 0.621). Thus, FFM significantly increased while TBF and BM decreased in comparison to pre-intervention levels. The analyzed results indicate that treatment or supplementation of individual hormone deficiencies can be a successful form of counteracting the aging process. Nevertheless, the effects of TT supplementation on the concentration of T as well as GH and IGF-1, requires further studies, especially in middle-aged and older subjects, along with different exercise programs. The analyzed results indicate that treatment or supplementation of individual hormone deficiencies can be a major form of counteracting the aging process.

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Physical fitness and performance of polish ice-hockey players competing at different sports levels

Roczniok

Stanula

Gabryś

et al. 2016

Journal of Human Kinetics

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The study aimed to determine the values of selected aerobic and anaerobic capacity variables, physical profiles, and to analyze the results of on-ice tests performed by ice-hockey players relegated to a lower league. Performance of 24 ice-hockey players competing in the top league in the 2012/2013 season was analysed to this end. In the 2013/2014 season, 14 of them still played in the top league (the control group), while 10 played in the first league (the experimental group). The study was conducted one week after the end of the playoffs in the seasons under consideration. The results revealed that only in the experimental group the analysed variables changed significantly between the seasons. In the Wingate test, significant changes were only noted in mean relative power (a decrease from 9.91 to 9.14 W/kg; p=0.045) and relative total work (a decrease from 299.17 to 277.22 J/kg; p=0.048). The ramp test indicated significantly lower power output in its final stages (364 compared with 384 W; p=0.034), as well as a significant decrease in relative VO2max (from 52.70 to 48.30 ml/min/kg). Blood lactate concentrations were recorded at the 3rd, 6th, 9th and 12th min of recovery after the ramp test. The rate of post-exercise recovery, ∆LA, recorded after the ramp test turned out to be significantly lower. The times recorded in the on-ice “6x30 m stop” test increased from 32.18 to 33.10 s (p=0.047). The study showed that playing in a lower league where games were less intensive, training sessions shorter and less frequent, had an adverse effect on the performance level of the investigated players. Lower VO2max recorded in the study participants slowed down their rates of post-exercise recovery and led to a significantly worse performance in the 6x30 m stop test, as well as lower relative power and relative total work in the Wingate test.

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Effects of Growth Hormone Therapy and Physical Exercise on Anaerobic and Aerobic Power, Body Composition, Lipoprotein Profile in Middle Aged Men

Cited by 12 publications

References 27 publications

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Endocrine Responses to Physical Training and Tribulus Terrestris Supplememtation in Middle-Age Men

Physical fitness and performance of polish ice-hockey players competing at different sports levels

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