scholarly journals Daily L-Leucine Supplementation in Novice Trainees During a 12-Week Weight Training Program

2011 ◽  
Vol 6 (1) ◽  
pp. 38-50 ◽  
Author(s):  
Theocharis Ispoglou ◽  
Roderick F.G.J. King ◽  
Remco C.J. Polman ◽  
Cathy Zanker
Keyword(s):  
Body Mass Index ◽  
Resistance Training ◽  
Training Program ◽  
Body Mass ◽  
Nutritional Supplement ◽  
Leucine Supplementation ◽  
Tissue Mass ◽  
Resistance Training Program ◽  
Strength Performance ◽  
Total Percentage

Purpose:To investigate the effects of daily oral L-leucine ingestion on strength, bone mineral-free lean tissue mass (LTM) and fat mass (FM) of free living humans during a 12-wk resistance-training program.Methods:Twenty-six initially untrained men (n = 13 per group) ingested either 4 g/d of L-leucine (leucine group: age 28.5 ± 8.2 y, body mass index 24.9 ± 4.2 kg/m2) or a corresponding amount of lactose (placebo group: age 28.2 ± 7.3 y, body mass index 24.9 ± 4.2 kg/m2). All participants trained under supervision twice per week following a prescribed resistance training program using eight standard exercise machines. Testing took place at baseline and at the end of the supplementation period. Strength on each exercise was assessed by fve repetition maximum (5-RM), and body composition was assessed by dual energy X-ray absorptiometry (DXA).Results:The leucine group demonstrated significantly higher gains in total 5-RM strength (sum of 5-RM in eight exercises) and 5-RM strength in five out of the eight exercises (P < .05). The percentage total 5-RM strength gains were 40.8% (± 7.8) and 31.0% (± 4.6) for the leucine and placebo groups respectively. Significant differences did not exist between groups in either total percentage LTM gains or total percentage FM losses (LTM: 2.9% ± 2.5 vs 2.0% ± 2.1, FM: 1.6% ± 15.6 vs 1.1% ± 7.6).Conclusion:These results suggest that 4 g/d of L-leucine supplementation may be used as a nutritional supplement to enhance strength performance during a 12-week resistance training program of initially untrained male participants.

scholarly journals Comparison of block versus weekly undulating periodization models on endocrine and strength changes in male athletes

Kinesiology ◽  
2016 ◽  
Vol 48 (1) ◽  
pp. 71-78 ◽  
Author(s):  
Sandro Bartolomei ◽  
Jay R. Hoffman ◽  
Jeffrey R. Stout ◽  
Maddalena Zini ◽  
Claudio Stefanelli ◽  
...  
Keyword(s):  
Resistance Training ◽  
Training Program ◽  
Body Mass ◽  
Upper Body ◽  
Hormone Response ◽  
Anabolic Hormone ◽  
Male Athletes ◽  
Resistance Training Program ◽  
Strength Performance ◽  
Before And After

The aim of this study was to examine the hormonal and strength responses to different periodization models of resistance training in male athletes. Eighteen experienced resistance trained males were randomly assigned to either a block (BP; n=10; age: 23.7±2.9 yr; body mass: 78.5±11.3 kg; height: 1.77±0.05 m) or weekly undulating (WUP; n=8; age: 26.0±5.7 y; body mass: 78.9±12.4 kg; height: 1.79±0.05 m) periodized resistance training program. Both programs consisted of four-training sessions per week for 15 weeks, and each was equated for training volume. Analysis of variance was used to compare strength performance and changes in hormone response between groups. Salivary samples were taken before and after the first and the last workout of each mesocycle of the training program and assessed for testosterone (T) and cortisol (C). Maximal strength testing occurred before and after the 15-week training program. A greater increase (p=.040) in bench press strength was observed in BP compared to WUP, while no between group differences were noted for lower body isometric strength (p=.168) and lean body mass (p=.344). Significant elevations in T were seen in both groups following the power training phase, while no differences were noted between BP and WUP during any other training cycle. Results indicated that BP stimulated greater gains in upper body strength compared to WUP. In addition, the power phase of training may provide a greater anabolic hormone response.

Free leucine supplementation during an 8-week resistance training program does not increase muscle mass and strength in untrained young adult subjects

Amino Acids ◽  
2017 ◽  
Vol 49 (7) ◽  
pp. 1255-1262 ◽  
Author(s):  
Andreo Fernando Aguiar ◽  
Alan Pablo Grala ◽  
Rubens Alexandre da Silva ◽  
Lúcio Flávio Soares-Caldeira ◽  
Francis Lopes Pacagnelli ◽  
...  
Keyword(s):  
Young Adult ◽  
Resistance Training ◽  
Training Program ◽  
Muscle Mass ◽  
Leucine Supplementation ◽  
Resistance Training Program ◽  
Increase Muscle Mass

The Effect of Recovery Time on Strength Performance Following a High-Intensity Bench Press Workout in Males and Females

2010 ◽  
Vol 5 (2) ◽  
pp. 184-196 ◽  
Author(s):  
Lawrence W. Judge ◽  
Jeanmarie R. Burke
Keyword(s):  
Resistance Training ◽  
Training Program ◽  
Recovery Time ◽  
Bench Press ◽  
Recovery Period ◽  
Strength Development ◽  
Resistance Training Program ◽  
Strength Performance ◽  
Repetition Maximum ◽  
Recovery Times

Purpose:To determine the effects of training sessions, involving high-resistance, low-repetition bench press exercise, on strength recovery patterns, as a function of gender and training background.Methods:The subjects were 12 athletes (6 males and 6 females) and age-matched college students of both genders (4 males and 4 females). The subjects completed a 3-wk resistance training program involving a bench press exercise, 3 d/wk, to become familiar with the testing procedure. After the completion of the resistance training program, the subjects, on three consecutive weeks, participated in two testing sessions per week, baseline session and recovery session. During the testing sessions, subjects performed fve sets of the bench press exercise at 50% to 100% of perceived fve repetition maximum (5-RM). Following the weekly baseline sessions, subjects rested during a 4-, 24-, or 48-h recovery period. Strength measurements were estimates of one repetition maximum (1-RM), using equivalent percentages for the number of repetitions completed by the subject at the perceived 5-RM effort of the bench press exercise.Results:The full-factorial ANOVA model revealed a Gender by Recovery Period by Testing Session interaction effect, F(2, 32) = 10.65; P < .05. Among male subjects, decreases in estimated 1-RM were detected at the 4- and 24-h recovery times. There were no differences in muscle strength among the female subjects, regardless of recovery time.Conclusions:For bench press exercises, using different recovery times of 48 h for males and 4 h for females may optimize strength development as a function of gender.

scholarly journals Bilateral back squat strength is increased during a 3-week undulating resistance training program with and without variable resistance in DIII collegiate football players

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e12189
Author(s):  
Jason Sawyer ◽  
Paul Higgins ◽  
Paul A. Cacolice ◽  
Troy Doming
Keyword(s):  
Resistance Training ◽  
Training Program ◽  
Body Mass ◽  
Football Players ◽  
Resistance Training Program ◽  
Variable Resistance ◽  
Back Squat ◽  
Significant Difference ◽  
Loading Methods ◽  
Collegiate Football

Background Optimizing training adaptations is of the utmost importance for the strength and conditioning professional. The pre-season of any sport is particularly important to ensure preparedness of the athletes. In DIII Collegiate Football pre-season consists of approximately 3 weeks. The abbreviated time of the pre-season increases the importance of optimizing training using safe methods, including alternative loading strategies. The purpose of the current study was to determine if a 3-week variable resistance training VRT during an undulating (UL) resistance training program elicited a greater increase in back squat strength compared to traditional loading methods. Methods and Materials Forty DIII Football players (age range: 18–25 years) participated in a 3-week UL bilateral back squat (BBS) program. Both groups performed the BBS 3 times per week with a minimum of 24 hours between exercise sessions. The control group (C) (n = 20) (height = 182.3 + 5.1 cm, body mass: pre = 102.8 ± 17.7 kg, post = 104.1 ± 17.8 kg) used traditional loading methods (i.e., Olympic weights only) and the experimental group (E) (n = 20) (height = 180.7 ± 8.0 cm, body mass: pre = 100.3 ± 27.1 kg, post = 101.0 ± 27.7 kg) used traditional loading methods and variable resistance (i.e., resistance bands). The variable resistance accounted for approximately 20% of the total resistance while 80% of the resistance was supplied by traditional loading methods. Results When all data was pooled, subjects had a significant increase (p < 0.05) in 1-RM BBS from pre (154.2 + 26.1 kg) to post (166.8 + 26.2 kg), with a percent increase of 8.13% at the completion of the 3-week training program. There was no significant difference (p > 0.05) between the C and E groups for muscular strength, muscular power, or vertical jump. Volume-loads were not significantly (p > 0.05) different between groups for any of the weeks (C: Week 1 = 858.1 + 101.3, Week 2 = 588.6 + 69.2, Week 3 = 332.5 + 38.9, Total = 1179.2 + 209.4 vs. E: Week 1 = 835.2 + 179.7, Week 2 = 572.2 + 123.4, Week 3 = 323.5 + 68.8, Total = 1730.9 + 371.8) or for the pre-season as a whole. Conclusion A traditional UL resistance training program and training program with variable resistance are both effective methods at increasing back squat strength during 3 weeks of training. Resistance band variable resistance (VR) does not enhance training effects within a 3-week mesocycle greater than traditional resistance.

Effects of Two Modalities of Whole-body Electrostimulation Programs and Resistance Circuit Training on Strength and Power

2019 ◽  
Vol 40 (13) ◽  
pp. 831-841
Author(s):  
Stefano DʼOttavio ◽  
Gianluca Briotti ◽  
Cristina Rosazza ◽  
Filippo Partipilo ◽  
Adriano Silvestri ◽  
...  
Keyword(s):  
Resistance Training ◽  
Training Program ◽  
Body Mass ◽  
Body Fat ◽  
Muscle Power ◽  
Dynamic Strength ◽  
Whole Body ◽  
Control Force ◽  
Circuit Training ◽  
Resistance Training Program

AbstractThe main purpose of this study was to compare the effects on strength and muscle power of a training program based on two different modalities of whole-body electrostimulation (WB-EMS) with respect to a resistance-training program aimed at improving dynamic strength. Twenty-two subjects participated in this study: Thirteen male (age 25.2±2.8 years; height 1.78±0.1 m; body mass 72.8±6.4 kg; body fat 11.6±2.3%) and nine female (age 28.2±3.5 years; height 1.63±0.05 m; body mass 56.8±7.6 kg; body fat 19.1±4.7%). Participants were randomly assigned to three groups that underwent three different 6-week training programs: two modalities of WB-EMS, based on different electrical parameters (experimental), and circuit training with overloads (control). Force-velocity curves were calculated for each participant before and after treatment. All groups improved their level of strength and muscle power (paired sample t-Test, p<0.01; d>1) with a similar magnitude. No significant differences were observed between groups (two-way 2×3 Anova, p>0.05) at the end of the experimentation. This study suggests that WB-EMS might be considered as a valid and faster alternative – or an important complementary procedure – to a traditional overload-based resistance-training program for the development of the DS.

scholarly journals Resistance Training and Youth

1989 ◽  
Vol 1 (4) ◽  
pp. 336-350 ◽  
Author(s):  
William J. Kraemer ◽  
Andrew C. Fry ◽  
Peter N. Frykman ◽  
Brian Conroy ◽  
Jay Hoffman
Keyword(s):  
Resistance Training ◽  
Training Program ◽  
Youth Sports ◽  
Normal Growth ◽  
Sports Participation ◽  
Resistance Training Program ◽  
Strength Performance ◽  
Training Adaptations ◽  
Risk Of Injury ◽  
Voluntary Strength

The use of resistance training for children has increased in popularity and interest. It appears that children are capable of voluntary strength gains. Exercise prescription in younger populations is critical and requires certain program variables to be altered from adult perspectives. Individualization is vital, as the rate of physiological maturation has an impact on the adaptations that occur. The major difference in programs for children is the use of lighter loads (i.e., > 6 RM loads). It appears that longer duration programs (i.e., 10-20 wks) are better for observing training adaptations. This may be due to the fact that it takes more exercise to stimulate adaptational mechanisms related to strength performance beyond that of normal growth rates. The risk of injury appears low during participation in a resistance training program, and this risk is minimized with proper supervision and instruction. Furthermore, with the incidence of injury in youth sports, participation in a resistance training program may provide a protective advantage in one’s preparation for sports participation.

The Effect of Long-Term Resistance Training on Anthropometric Measures, Muscle Strength, and Self Concept in Pre-Pubertal Boys

2001 ◽  
Vol 13 (4) ◽  
pp. 357-372 ◽  
Author(s):  
Eliahu Sadres ◽  
Alon Eliakim ◽  
Naama Constantini ◽  
Ronnie Lidor ◽  
Bareket Falk
Keyword(s):  
Resistance Training ◽  
Muscle Strength ◽  
Training Program ◽  
Body Mass ◽  
Self Concept ◽  
Moderate Intensity ◽  
Knee Extensors ◽  
Control Group ◽  
Resistance Training Program ◽  
Prepubertal Boys

The purpose of this study was to examine the effect of 2 school years (21 months) of a twice-weekly resistance training program on stature, muscle strength, and self-concept among prepubertal boys. The experimental group (E, n = 27) aged 9.2 ± 0.3 yrs, participated in progressive resistance training, while the control group (C, n = 22) aged 9.4 ± 0.3 yrs, participated in standard physical education classes (as advised by the Ministry of Education). Training sessions included 1–4 sets of 3–6 exercises, with 5–30 repetitions/set. The load ranged between 30% and 70% 1RM. No differences were observed in the gain in body height between groups. Muscle strength increased significantly more in E (e.g., knee extensors: 0.51 ± 0.13 to 0.77 ± 0.16 kg/kg body mass), compared with C (0.34 ± 0.12 to 0.54 ± 0.11 kg/kg body mass). One minor injury was reported throughout the study. Initial scores of self-concept were high in both groups, with no training effect. The results demonstrate that among prepubertal boys, a twice-weekly low-to-moderate-intensity resistance training program over a period of 2 school years (21 months) can result in enhancement in muscle strength with no detrimental effect on growth.

Effect Of Resistance Training In Children Who Are Overweight Or Obese – Pilot Study

2020 ◽  
Author(s):  
Kateřina Strašilová ◽  
Petr Vajda ◽  
Tomáš Hlinský
Keyword(s):  
Body Composition ◽  
Resistance Training ◽  
Training Program ◽  
Lean Body Mass ◽  
Body Mass ◽  
Fat Mass ◽  
Total Body Weight ◽  
Obese Children ◽  
Resistance Training Program ◽  
Before And After

Overweight and obese children often suffer for many physiological and psychological is-sues. Resistance training allows them to excel over their peers due to strength ability which is related to their somatotype. The aim of this study was to examine the effect of an eight-week resistance training program on body composition in overweight and obese children. Study sample included 8 boys and 4 girls (age = 11.7 ± 1.54) who were involved in an eight-week strength specifically designed program consisted of two strength training unit per week. Resistance of exercise was set on 8‒10 RM. Body composition were measured by InBody 720 two times before and after the training intervention. The Wilcoxon matched pairs test was used. Results showed increase in total body weight (2.7%), lean body mass (2.5%) and fat mass (3.7%). This effect indicates that used resistance training program is suficient to lean body mass grow. Nevertheless, program proved to be inadequate to avoid an increase in fat mass. This could be caused by many factors which should be consider in further research (e.g. longer technique practice, diet, number of training units).

scholarly journals Short-Time β-Alanine Supplementation on the Acute Strength Performance after High-Intensity Intermittent Exercise in Recreationally Trained Men

Sports ◽  
2019 ◽  
Vol 7 (5) ◽  
pp. 108 ◽  
Author(s):  
Marcelo Conrado Freitas ◽  
Jason Cholewa ◽  
Valéria Panissa ◽  
Giovanni Quizzini ◽  
João Vitor de Oliveira ◽  
...  
Keyword(s):  
Resistance Training ◽  
Resistance Exercise ◽  
Training Program ◽  
High Intensity ◽  
Intermittent Exercise ◽  
Bioelectrical Impedance ◽  
Fat Free Mass ◽  
Resistance Training Program ◽  
Strength Performance ◽  
Leg Press

(1) Background: We investigated the effects of 28 days of beta-alanine (β-alanine) supplementation on the acute interference effect of high-intensity intermittent exercise (HIIE) on lower-body resistance exercise performance, body composition, and strength when combined with a resistance training program. (2) Methods: Twenty-two males were randomized into: β-alanine supplementation (6.4 g/day) or placebo (6.4 g/day maltodextrin) during 28 days. Total body water, intracellular and extracellular water, fat-free mass (FFM), and fat mass were assessed using bioelectrical impedance. Participants performed 5000-m HIIE (1:1 effort and rest ratio) followed by resistance exercise (four sets of 80% at 45° leg press until muscular failure) at baseline and after 28 days. The resistance training program consisted of three sets of 10 to 12 RM with 90 s of rest, four days per week. (3) Results: For the post-HIIE leg press volume, higher values were observed post-training than pre-training, but no group x time interaction was observed. There was a non-significant trend for an interaction in the FFM change (β-alanine = 2.8% versus placebo = 1.0%, p = 0.072). (4) Conclusion: Twenty-eight days of β-alanine supplementation did not prevent acute strength loss during resistance exercise after high-intensity interval exercise, nor increase strength or hypertrophic adaptations associated with resistance training.

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