scholarly journals Effect of 24 weeks of KAATSU resistance training on femoral muscle size and safety in a 84-year-old woman.

2019 ◽  
Vol 15 (1) ◽  
pp. 1-4
Author(s):  
Tomohiro Yasuda ◽  
Kazuya Fukumura ◽  
Yoshiaki Sato ◽  
Toshiaki Nakajima
Keyword(s):  
Resistance Training ◽  
Muscle Size ◽  
Femoral Muscle

scholarly journals A Systematic Review with Meta-Analysis of the Effect of Resistance Training on Whole-Body Muscle Growth in Healthy Adult Males

2020 ◽  
Vol 17 (4) ◽  
pp. 1285 ◽  
Author(s):  
Pedro J. Benito ◽  
Rocío Cupeiro ◽  
Domingo J. Ramos-Campo ◽  
Pedro E. Alcaraz ◽  
Jacobo Á. Rubio-Arias
Keyword(s):  
Systematic Review ◽  
Resistance Training ◽  
Muscle Mass ◽  
Meta Analysis ◽  
Muscle Growth ◽  
Fat Free Mass ◽  
Muscle Size ◽  
Whole Body ◽  
Cochrane Library ◽  
Significant Variable

We performed a systematic review and meta-analysis to study all published clinical trial interventions, determined the magnitude of whole-body hypertrophy in humans (healthy males) and observed the individual responsibility of each variable in muscle growth after resistance training (RT). Searches were conducted in PubMed, Web of Science and the Cochrane Library from database inception until 10 May 2018 for original articles assessing the effects of RT on muscle size after interventions of more than 2 weeks of duration. Specifically, we obtain the variables fat-free mass (FMM), lean muscle mass (LMM) and skeletal muscle mass (SMM). The effects on outcomes were expressed as mean differences (MD) and a random-effects meta-analysis and meta-regressions determined covariates (age, weight, height, durations in weeks…) to explore the moderate effect related to the participants and characteristics of training. One hundred and eleven studies (158 groups, 1927 participants) reported on the effects of RT for muscle mass. RT significantly increased muscle mass (FFM+LMM+SMM; Δ1.53 kg; 95% CI [1.30, 1.76], p < 0.001; I2 = 0%, p = 1.00). Considering the overall effects of the meta-regression, and taking into account the participants’ characteristics, none of the studied covariates explained any effect on changes in muscle mass. Regarding the training characteristics, the only significant variable that explained the variance of the hypertrophy was the sets per workout, showing a significant negative interaction (MD; estimate: 1.85, 95% CI [1.45, 2.25], p < 0.001; moderator: -0.03 95% CI [−0.05, −0.001] p = 0.04). In conclusion, RT has a significant effect on the improvement of hypertrophy (~1.5 kg). The excessive sets per workout affects negatively the muscle mass gain.

Resistance Training Increases Muscle Strength and Muscle Size in Patients With Liver Cirrhosis

2020 ◽  
Vol 18 (5) ◽  
pp. 1179-1187.e6 ◽  
Author(s):  
Luise Aamann ◽  
Gitte Dam ◽  
Mette Borre ◽  
Aska Drljevic-Nielsen ◽  
Kristian Overgaard ◽  
...  
Keyword(s):  
Liver Cirrhosis ◽  
Resistance Training ◽  
Muscle Strength ◽  
Muscle Size

Effects of resistance training and chromium picolinate on body composition and skeletal muscle in older men

1999 ◽  
Vol 86 (1) ◽  
pp. 29-39 ◽  
Author(s):  
Wayne W. Campbell ◽  
Lyndon J. O. Joseph ◽  
Stephanie L. Davey ◽  
Deanna Cyr-Campbell ◽  
Richard A. Anderson ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Body Composition ◽  
Resistance Training ◽  
Muscle Power ◽  
Older Men ◽  
Muscle Size ◽  
Whole Body ◽  
Chromium Picolinate ◽  
High Dose ◽  
Repetition Maximum

The effects of chromium picolinate (CrPic) supplementation and resistance training (RT) on skeletal muscle size, strength, and power and whole body composition were examined in 18 men (age range 56–69 yr). The men were randomly assigned (double-blind) to groups ( n = 9) that consumed either 17.8 μmol Cr/day (924 μg Cr/day) as CrPic or a low-Cr placebo for 12 wk while participating twice weekly in a high-intensity RT program. CrPic increased urinary Cr excretion ∼50-fold ( P < 0.001). RT-induced increases in muscle strength ( P < 0.001) were not enhanced by CrPic. Arm-pull muscle power increased with RT at 20% ( P = 0.016) but not at 40, 60, or 80% of the one repetition maximum, independent of CrPic. Knee-extension muscle power increased with RT at 20, 40, and 60% ( P < 0.001) but not at 80% of one repetition maximum, and the placebo group gained more muscle power than did the CrPic group (RT by supplemental interaction, P < 0.05). Fat-free mass ( P < 0.001), whole body muscle mass ( P < 0.001), and vastus lateralis type II fiber area ( P < 0.05) increased with RT in these body-weight-stable men, independent of CrPic. In conclusion, high-dose CrPic supplementation did not enhance muscle size, strength, or power development or lean body mass accretion in older men during a RT program, which had significant, independent effects on these measurements.

scholarly journals Effects of Different Combinations of Concentric and Eccentric Resistance Training Programs on Traditional and Alternative Hamstrings-to-Quadriceps Ratios

Sports ◽  
2019 ◽  
Vol 7 (10) ◽  
pp. 221 ◽  
Author(s):  
Cassio V. Ruas ◽  
Ronei S. Pinto ◽  
Guy G. Haff ◽  
Camila D. Lima ◽  
Lee E. Brown
Keyword(s):  
Resistance Training ◽  
Injury Risk ◽  
Muscle Activation ◽  
Training Programs ◽  
Knee Extension ◽  
Muscle Size ◽  
Ligament Injury ◽  
Knee Ligament ◽  
Knee Ligament Injury ◽  
Muscle Balance

Resistance training is often recommended for combined increases in traditional and alternative hamstrings-to-quadriceps (H:Q) ratios in order to reduce knee strength imbalance and associated hamstrings and knee ligament injury risk. The aim of this study was to investigate the effect of different concentric and eccentric resistance training programs on traditional and alternative H:Q ratios. Forty male volunteers were assigned to one of 4 groups: concentric quadriceps and concentric hamstrings (CON/CON, n = 10), eccentric quadriceps and eccentric hamstrings (ECC/ECC, n = 10), concentric quadriceps and eccentric hamstrings (CON/ECC, n = 10), or no training (control (CNTRL), n = 10). Traditional conventional (CR) and functional (FR), alternative rate of torque development (RTD), muscle size (MS), and muscle activation (MA) H:Q ratios were measured before and after six weeks of unilateral nondominant knee extension–flexion resistance training performed on an isokinetic dynamometer. The ECC/ECC training significantly increased FR (pre = 0.75 ± 0.11; post = 0.85 ± 0.15), whereas the lack of training (CNTRL) decreased the RTD H:Q ratio (pre = 1.10 ± 0.67; post = 0.73 ± 0.33). There were no differences between groups for the other traditional and alternative ratios following resistance training protocols. These findings suggest eccentric exercise for quadriceps and hamstrings as the most beneficial training program for inducing increases in the traditional FR. However, different resistance training strategies may be needed to also elicit increases in the alternative RTD, MS, and MA H:Q ratios for fully restoring muscle balance and reducing potential hamstrings and knee ligament injury risk.

Vitamin D Receptor Genetic Variants And The Muscle Size And Strength Response To Resistance Training

2009 ◽  
Vol 41 ◽  
pp. 515
Author(s):  
Sean Walsh ◽  
Theodore J. Angelopoulos ◽  
Priscilla M. Clarkson ◽  
Paul M. Gordon ◽  
Niall M. Moyna ◽  
...  
Keyword(s):  
Vitamin D ◽  
Resistance Training ◽  
Vitamin D Receptor ◽  
Genetic Variants ◽  
Muscle Size

Muscle Size And Arterial Stiffness After Blood Flow-restricted Elastic Band Resistance Training In Older Adults

2014 ◽  
Vol 46 ◽  
pp. 89
Author(s):  
Tomohiro Yasuda ◽  
Kazuya Fukumura ◽  
Yusuke Uchida ◽  
Hitomi Koshi ◽  
Haruko Iida ◽  
...  
Keyword(s):  
Older Adults ◽  
Blood Flow ◽  
Resistance Training ◽  
Arterial Stiffness ◽  
Muscle Size ◽  
Elastic Band

Inactivity and muscle: effect of resistance training during bed rest on muscle size in the lower limb

2001 ◽  
Vol 172 (4) ◽  
pp. 269-278 ◽  
Author(s):  
H. Akima ◽  
K. Kubo ◽  
M. Imai ◽  
H. Kanehisa ◽  
Y. Suzuki ◽  
...  
Keyword(s):  
Resistance Training ◽  
Lower Limb ◽  
Bed Rest ◽  
Muscle Size

Evidence of a Ceiling Effect for Training Volume in Muscle Hypertrophy and Strength in Trained Men—Less is More?

2020 ◽  
Vol 15 (2) ◽  
pp. 268-277 ◽  
Author(s):  
Matheus Barbalho ◽  
Victor S. Coswig ◽  
James Steele ◽  
James P. Fisher ◽  
Jurgen Giessing ◽  
...  
Keyword(s):  
Resistance Training ◽  
Muscle Hypertrophy ◽  
Biceps Brachii ◽  
Gluteus Maximus ◽  
Muscle Thickness ◽  
Muscle Performance ◽  
Muscle Size ◽  
Triceps Brachii ◽  
Less Is More ◽  
Time Interaction

Purpose: To compare the effects of different resistance training volumes on muscle performance and hypertrophy in trained men. Methods: Thirty-seven volunteers performed resistance training for 24 weeks, divided into groups that performed 5 (G5), 10 (G10), 15 (G15), and 20 (G20) sets per muscle group per week. Ten-repetition maximum (10RM) tests were performed for the bench press, lat pulldown, 45° leg press, and stiff-legged deadlift. Muscle thickness was measured using ultrasound at biceps brachii, triceps brachii, pectoralis major, quadriceps femoris, and gluteus maximus. All measurements were performed at the beginning (pre), 12 (mid), and 24 weeks (post) of training. Results: All groups showed significant increases in all 10RM tests and muscle thickness measures after 12 and 24 weeks when compared with pre (P < .05). There were no significant differences in any 10RM test or changes between G5 and G10 after 12 and 24 weeks. G5 and G10 showed significantly greater increases for 10RM than G15 and G20 for most exercises at 12 and 24 weeks. There was no group by time interaction for any muscle thickness measure. Conclusions: The results bring evidence of an inverted “U-shaped” curve for the dose–response curve for muscle strength. Although the same trend was noted for muscle hypertrophy, the results did not reach significance. Five to 10 sets per week might be sufficient for bringing about optimal gains in muscle size and strength in trained men over a 24-week period.

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