scholarly journals What Dose of Caffeine to Use: Acute Effects of 3 Doses of Caffeine on Muscle Endurance and Strength

2020 ◽  
Vol 15 (4) ◽  
pp. 470-477 ◽  
Author(s):  
Jozo Grgic ◽  
Filip Sabol ◽  
Sandro Venier ◽  
Ivan Mikulic ◽  
Nenad Bratkovic ◽  
...  
Keyword(s):  
Linear Trend ◽  
Upper Body ◽  
Muscle Endurance ◽  
Placebo Control ◽  
Lower Body ◽  
Repetition Maximum ◽  
Body Muscle ◽  
Body Strength ◽  
Upper Body Strength ◽  
Lower Body Strength

Purpose: To explore the effects of 3 doses of caffeine on muscle strength and muscle endurance. Methods: Twenty-eight resistance-trained men completed the testing sessions under 5 conditions: no-placebo control, placebo control, and with caffeine doses of 2, 4, and 6 mg·kg−1. Muscle strength was assessed using the 1-repetition-maximum test; muscle endurance was assessed by having the participants perform a maximal number of repetitions with 60% 1-repetition maximum. Results: In comparison with both control conditions, only a caffeine dose of 2 mg·kg−1 enhanced lower-body strength (d = 0.13–0.15). In comparison with the no-placebo control condition, caffeine doses of 4 and 6 mg·kg−1 enhanced upper-body strength (d = 0.07–0.09) with a significant linear trend for the effectiveness of different doses of caffeine (P = .020). Compared with both control conditions, all 3 caffeine doses enhanced lower-body muscle endurance (d = 0.46–0.68). For upper-body muscle endurance, this study did not find significant effects of caffeine. Conclusions: This study revealed a linear trend between the dose of caffeine and its effects on upper-body strength. The study found no clear association between the dose of caffeine and the magnitude of its ergogenic effects on lower-body strength and muscle endurance. From a practical standpoint, the magnitude of caffeine’s effects on strength is of questionable relevance. A low dose of caffeine (2 mg·kg−1)—for an 80-kg individual, the dose of caffeine in 1–2 cups of coffee—may produce substantial improvements in lower-body muscle endurance with the magnitude of the effect being similar to that attained using higher doses of caffeine.

Associations of Maternal Prepregnancy Body Mass Index and Gestational Weight Gain With Physical Fitness in Childhood

2020 ◽  
Vol 32 (3) ◽  
pp. 165-171
Author(s):  
Konstantinos D. Tambalis ◽  
Stamatis Mourtakos ◽  
Labros S. Sidossis
Keyword(s):  
Physical Fitness ◽  
Cardiorespiratory Fitness ◽  
Upper Body ◽  
Lower Body ◽  
Gestational Weight ◽  
Prepregnancy Body Mass Index ◽  
Body Strength ◽  
Fitness Tests ◽  
Upper Body Strength ◽  
Lower Body Strength

Purpose: To investigate the potential associations of maternal prepregnancy body mass index (mppBMI) and gestational weight gain (GWG) with physical fitness in children. Methods: A random sample of 5125 children and their mothers was evaluated. The mothers provided data contained in their medical booklets and pregnancy ultrasound records. The data from 5 physical fitness tests (eg, 20-m shuttle run, 30-m sprint, vertical jump, standing long jump, and small ball throw) were used to assess children’s cardiorespiratory fitness, speed, explosive power, and lower and upper body strength, respectively. Results: MppBMI was inversely associated with cardiorespiratory fitness (b = −0.02), lower body strength (b = −1.01), upper body strength (b = −0.07), and speed (b = 0.04). Also, GWG was unfavorably associated with cardiorespiratory fitness (b = −0.02), lower body strength (b = −1.12), upper body strength (b = −0.03), and speed (b = 0.03), after adjusting for sex, birth weight, and children’s BMI (all P values < .05). Children of mothers with an mppBMI ≥ 25 kg/m2 and excess GWG had almost 30% and 20% increased odds for low performances in physical fitness tests than those of mothers with an mppBMI < 25 kg/m2 and adequate GWG, respectively. Conclusions: Antenatal factors such as increased mppBMI and excess GWG could play an unfavorable role in the future health of the offspring.

scholarly journals Comparing periodised protocols for the maintenance of strength and power in resistance-trained women

2017 ◽  
Vol 6 (2) ◽  
Author(s):  
Kok Lian Yee
Keyword(s):  
Body Mass ◽  
Repeated Measures ◽  
Bench Press ◽  
Upper Body ◽  
Lower Body ◽  
Power Training ◽  
Body Strength ◽  
Upper Body Strength ◽  
Lower Body Strength ◽  
Training Programmes

Purpose: The purpose of the study was to compare the effects of daily undulating periodisation (DUP) and session undulating periodisation (SUP) for maintaining strength and power over a 3-wk period in a group of resistance-trained women.  DUP comprised one session each of strength and power training while DUP combined both strength and power training within each session.  Both training programmes were equalised for training volume and intensity.  Methods: Sixteen resistance-trained women were pre-tested for body mass, mid-arm and mid-thigh girths, one-repetition maximum (1 RM) dynamic squat (SQ) and bench press (BP), and  power during countermovement jumps (CMJ) and bench press throws (BPT). The 1 RM SQ and BP data were used to assign the participants into groups for twice a week training.  Results:  A two-way (group x time) analysis of variance (ANOVA) with repeated measures for time found no significant changes in body mass, mid-arm girth, 1 RM BP and SQ, and BPT and CMJ power for both groups.  However, significant changes in mid-thigh girth were found (F1, 13 = 5.733, p = 0.032). Pooled BP data indicated improved upper body strength (BP: F1, 13 = 6.346, p = 0.025) and decreased CMJ power (p = 0.016).  Conclusions:  Both DUP and SUP programmes increased upper-body strength and maintained lower-body strength adequately across a 3-wk phase probably because the participants were weaker in the upper-body and the lower-body had a reduced capacity for strength adaptations and improvements.

scholarly journals Functional fitness: A key to independent and active living in the later age

2016 ◽  
Vol 8 (2) ◽  
pp. 711-714
Author(s):  
Sonia Tewari ◽  
Seema Kwatra ◽  
Neha Triphati
Keyword(s):  
Nuclear Family ◽  
Preventive Measure ◽  
Activity Level ◽  
Upper Body ◽  
Functional Fitness ◽  
Lower Body ◽  
Body Strength ◽  
Upper Body Strength ◽  
Males And Females ◽  
Lower Body Strength

Aging is a biological process and is associated with decrease in the physical activity level. With the aim of assessing the functional fitness level of senior citizens, sample size comprised of 90 i.e. 45 males and 45 females (15 male and 15 female from each age group viz. 60-64 year 65-69 year and 70-74 year) were chosen conveniently from Haldwani Block of district Nainital, Uttarakhand, India. The Senior Fitness Test was conducted to collect experimental data. With age, lower body strength of males changes but not in case of females. The other functional parameters amongst males and females i.e. upper Body Strength, lower and Upper Body Flexibility, AerobicEndurance and Balance does not depend on the age. Out of six parameters of functional fitness, it was found that the average mean score of lower body strength (5.96), upper body strength (3.52) and aerobic endurance (4.85) of males and females are highly significant at 1% level of significant while average upper body flexibility (2.52) of males and females were significant at 5 % level of significance. With time, society has witnessed significant changes in lifestyle pattern, arising nuclear family groups, dual-earner families, competitiveness and rural-urban or cross-country immigration among young children. The scenario thus further placed need to lay emphasis onfunctional fitness of elderly population so that the older parents who are living alone can be functionally active and independent and care and rare themselves. Assessing the functional level of elderly can serve as a preventive measure prior to any functional limitations.

scholarly journals The relationship between second-to-fourth digit ratio (2D:4D), muscle strength and body composition to bone mineral density in young women

Kinesiology ◽  
2019 ◽  
Vol 51 (2) ◽  
pp. 238-245
Author(s):  
Hamid Arazi ◽  
Ehsan Eghbali
Keyword(s):  
Body Composition ◽  
Muscle Strength ◽  
Young Women ◽  
Upper Body ◽  
Lower Body ◽  
Fat Percentage ◽  
Mineral Density ◽  
Body Strength ◽  
Lower Body Strength ◽  
The Relationship

2D:4D ratio is determined by balance between androgens and estrogens. Low level estrogen reduces bone mineral density (BMD) and incurs negative changes to bone microarchitecture, increasing the risk of osteoporosis and, as a consequence, fracture risk in women. The purpose of this study was to investigate the relationship between 2D:4D, muscle strength and body composition to BMD in young women. One hundred twenty-seven young women (age range 24-36 years) voluntarily participated in this study. Lengths of the second (index) and fourth (ring) fingers, upper and lower body strength and body composition (body mass index, BMI; waist to hip ratio, WHR) and body fat percentage were estimated. Also, blood levels of calcium and 25-hydroxyvitamin D (25OHD) were evaluated and dual-energy X-ray absorptiometry device was used to measure BMD in the lumbar spine (LS) and femoral neck (FN). The results showed that digit ratios, upper body and lower body muscle strength, BMI and fat percentage had a positive relationship with LS and FN BMD (LS BMD: r=.47, r=.56, r=.46, r=.34, r=.28, p≤.001, respectively; FN BMD: r=.34, r=.49, r=.51, r=.45, r=.27, p≤.001, respectively). In addition, there was no significant relationship between WHR and BMD of LS and FN (p˃.05). Multiple linear regression analysis showed the upper body strength was a stronger determinant of LS BMD and the lower body strength was a stronger determinant of FN BMD. Based on the results, the researchers concluded that upper and lower body strength, 2D:4D ratios and BMI were important determinants of young women’s BMD. Also, it seemed that some of these factors may be able to help predicting the osteoporosis potential in young women

Decreased Serum Levels of C-Terminal Agrin in Postmenopausal Women Following Resistance Training

2020 ◽  
Vol 28 (1) ◽  
pp. 73-80 ◽  
Author(s):  
Darryn S. Willoughby ◽  
Kaitlan N. Beretich ◽  
Marcus Chen ◽  
LesLee K. Funderburk
Keyword(s):  
Body Composition ◽  
Resistance Training ◽  
Neuromuscular Junction ◽  
Serum Levels ◽  
Upper Body ◽  
Lower Body ◽  
Serum Estradiol ◽  
Body Strength ◽  
Before And After ◽  
Lower Body Strength

Elevated circulating C-terminal agrin fragment (CAF) is a marker of neuromuscular junction degradation and sarcopenia. This study sought to determine if resistance training (RT) impacted the serum levels of CAF in perimenopausal (PERI-M) and postmenopausal (POST-M) women. A total of 35 women, either PERI-M or POST-M, participated in 10 weeks of RT. Body composition, muscle strength, and serum estradiol and CAF were determined before and after the RT. The data were analyzed with two-way analysis of variance (p ≤ .05). Upper body and lower body strength was significantly increased, by 81% and 73% and 86% and 79% for the PERI-M and POST-M participants, respectively; however, there were no significant changes in body composition. Estradiol was significantly less for the POST-M participants at pretraining compared with the PERI-M participants. CAF moderately increased by 22% for the PERI-M participants in response to RT, whereas it significantly decreased by 49% for the POST-M participants. Ten weeks of RT reduced the circulating CAF in the POST-M women and might play a role in attenuating degenerative neuromuscular junction changes.

scholarly journals Physical capacity of New South Wales ambulance paramedics

2019 ◽  
Author(s):  
J R Hunter ◽  
A J Macquarrie ◽  
S C Sheridan
Keyword(s):  
Injury Risk ◽  
New South ◽  
New South Wales ◽  
Age Groups ◽  
Physical Capacity ◽  
Upper Body ◽  
Lower Body ◽  
South Wales ◽  
Body Strength ◽  
Lower Body Strength

AbstractBackgroundParamedics are among the most frequently injured health professionals in Australia. A lack of physical capacity may contribute to injury risk in this occupational population.AimsThis study sought to describe and compare the physical fitness of male and female paramedics across age groups to ascertain differences in physical capacity.MethodsA group of regional Australian paramedics (n = 140; 78 males; mean ± SD 37.4 ± 9.9 years; body mass index 28.1 ± 4.9 kg/m2) underwent a fitness assessment. Measures included upper, lower and core-body muscular strength and flexibility. Outcomes were compared between genders and across age groups using two-way between-groups analysis of variance.ResultsMale paramedics had greater upper body strength (P < 0.05; push-ups) mean (95% CI): 22.6 (19.4–25.9) versus 18.7 (15.2–22.3); similar lower body strength (single-leg wall squat): 39.0 (32.6–45.3) s versus 36.7 (27.1–46.3) s; greater core strength (P < 0.05; prone plank hold): 87.9 (77.6–98.3) s versus 73.8 (63.7–83.8) s; similar upper body flexibility (back scratch): −4.0 (−6.7 to −1.3) cm versus −0.3 (−2.2 to 1.7) cm; and similar lower body flexibility (sit and reach): 20.4 (18.2–22.6) cm versus 26.1 (23.5–28.7) cm to female paramedics. Core, upper and lower body strength all decreased with age (P < 0.05).ConclusionsCore, upper and lower body strength and upper body flexibility were poorer for older compared to younger regional paramedics in New South Wales, Australia. Future research should investigate whether these outcomes are associated with occupational injury risk. This information would assist in the design of injury prevention interventions for paramedics such as tailored workplace exercise programs.

Influence Of Lower Body Resistance Training On Upper Body Strength Adaptations In Trained Men.

2016 ◽  
Vol 48 ◽  
pp. 933-934
Author(s):  
Sandro Bartolomei ◽  
Jay R. Hoffman ◽  
Jeffrey R. Stout ◽  
Franco Merni
Keyword(s):  
Resistance Training ◽  
Upper Body ◽  
Lower Body ◽  
Body Strength ◽  
Upper Body Strength ◽  
Body Resistance

scholarly journals Secular trends in health-related physical fitness among 11–14-year-old Croatian children and adolescents from 1999 to 2014

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mario Kasović ◽  
Lovro Štefan ◽  
Vilko Petrić
Keyword(s):  
Body Size ◽  
Physical Fitness ◽  
Children And Adolescents ◽  
Cardiorespiratory Fitness ◽  
Upper Body ◽  
Lower Body ◽  
Body Strength ◽  
Health Related ◽  
Upper Body Strength ◽  
Lower Body Power

AbstractThe main purpose of the study was to analyze secular trends of health-related physical fitness in 7–14-year-old Croatian children and adolescents from 1999 and 2014. In this observational cross-sectional study, we recruited 5077 children and adolescents between ages 11 and 14 (50.8% girls) from five primary schools located in the capital city of Zagreb. Physical fitness performance was tested from 1999 until 2014. Physical fitness performance included: (1) body-mass index (measure of body size), (2) standing broad jump (measure of lower-body power), (3) polygon backwards (measure of general coordination and agility), (4) sit-ups in 60 s (measure of upper-body strength), (5) sit-and-reach test (measure of flexibility) and (6) 6-min run test (measure of cardiorespiratory fitness). Boys performed better in all physical fitness tests, except for sit-and-reach test (p < 0.001). In boys, between 1999 and 2014, body size, upper-body strength and coordination/agility increased, while flexibility, lower-body power and cardiorespiratory fitness decreased. During the same period, girls experienced an increase in body size, lower-body power, upper-body strength, coordination/agility and flexibility, while cardiorespiratory fitness decreased. This study shows that cardiorespiratory fitness, flexibility and coordination/agility decrease, while upper-body strength increases in both sexes. These findings should serve as an avenue for national monitoring system to screen and track biological development in children and adolescents.

Effect of Lower-Body Resistance Training on Upper-Body Strength Adaptation in Trained Men

2018 ◽  
Vol 32 (1) ◽  
pp. 13-18 ◽  
Author(s):  
Sandro Bartolomei ◽  
Jay R. Hoffman ◽  
Jeffrey R. Stout ◽  
Franco Merni
Keyword(s):  
Resistance Training ◽  
Upper Body ◽  
Lower Body ◽  
Body Strength ◽  
Upper Body Strength ◽  
Body Resistance

scholarly journals Kung Fu Training Improves Physical Fitness Measures in Overweight/Obese Adolescents: The “Martial Fitness” Study

2010 ◽  
Vol 2010 ◽  
pp. 1-10 ◽  
Author(s):  
Tracey W. Tsang ◽  
Michael R. Kohn ◽  
Chin Moi Chow ◽  
Maria Antoinette Fiatarone Singh
Keyword(s):  
Physical Fitness ◽  
Cardiovascular Fitness ◽  
Upper Body ◽  
Muscle Endurance ◽  
Lower Body ◽  
Obese Adolescents ◽  
Kung Fu ◽  
Body Muscle ◽  
Physical Measurements

Aim. To examine the efficacy of a six-month Kung Fu (KF) program on physical fitness in overweight/obese adolescents.Methods. Subjects were randomly assigned to the KF or sham exercise (Tai Chi, TC) control group. Physical measurements in cardiovascular fitness and muscle fitness occurred at baseline and after 6 months of training thrice weekly.Results. Twenty subjects were recruited. One subject was lost to follow-up, although overall compliance to the training sessions was46.7±27.8%. At follow-up, the cohort improved in absolute upper (P=.002) and lower (P=.04) body strength, and upper body muscle endurance (P=.02), without group differences. KF training resulted in significantly greater improvements in submaximal cardiovascular fitness (P=.03), lower body muscle endurance (P=.28; significant 95% CI: 0.37–2.49), and upper body muscle velocity (P=.03) relative to TC training.Conclusions. This short-term KF program improved submaximal cardiovascular fitness, lower body muscle endurance, and muscle velocity, in overweight/obese adolescents with very low baseline fitness.

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