scholarly journals Passive Repetitive Isokinetic Training Compared with Resistance Training: Effects on Performance and Hormones in Untrained Men

2007 ◽  
Vol 13 (1) ◽  
pp. 20-28
Author(s):  
Shu Lin LEE ◽  
Chuan Show CHEN ◽  
Tzyy Yuang SHIANG ◽  
Mu San CHANG ◽  
Hsin I LO ◽  
...  
Keyword(s):  
Resistance Training ◽  
Vertical Jump ◽  
Performance Testing ◽  
Maximal Strength ◽  
Power Performance ◽  
Isokinetic Training ◽  
Strength Performance ◽  
Before And After ◽  
Traditional Resistance Training ◽  
Stretch Shortening Cycle

LANGUAGE NOTE | Document text in English; abstract also in Chinese. The purpose of this study was to investigate the effects of 10 weeks Passive Repetitive Isokinetic Training (PRI) training on hormone concentrations and physical performance. Nineteen untrained men were randomized to intervention with either PRI training (n=10) or traditional resistance training (n=9). PRI group performed five sets with ten repetitions with corresponding 70-75% repetition maximum (RM) loads on the PRI platform and 2-min rest periods, whereas TR group performed the same protocol with squat exercise. Strength and power performance testing were measured before and after 10-week training. Resting hormones were measured at pre-training (week-0), week-6, and post training (week-10). The results of our study were that after 10 weeks of PRI training, vertical jump, running vertical jump, 30-m sprint time and maximal strength by squat-test were significantly higher with respect to pre-training (p<0.05). In TR group, maximal strength by squatting test was significantly increased compared with pre-training (p<0.05), while no significantly changes were observed for the other power tests. There were no significantly changes in GH, IGF-1, testosterone, cortisol, and T/C ratio during the 10-week training period in both groups. The data indicated that PRI and traditional resistances training have similar hormonal states. The PRI training significantly increased power and strength performance. 被動反覆衝擊式訓練(Passive Repetitive Isokinetic Training；PRI)主要是依據伸展縮短循環(Stretch-Shortening-Cycle)特性所發展出的一種訓練肌力和爆發力的器材，然而PRI訓練對訓練效果及人體體內荷爾蒙的影響，尚無相關的實驗數值來證實。因此，本研究目的在探討PRI訓練前後安靜期血液中荷爾蒙之變化及肌力與爆發力等運動表現的影響。研究中共有19名受試者，隨機分為PRI訓練組(n=10)及傳統蹲舉訓練組(TR；n=9)，進行每週三次共10週之訓練，並於訓練前、訓練第6週及訓練後分別進行安靜時的血液採集，分析安靜時血液中生長激素(Growth hormone；GH)、類胰島素生長因子(Insulin-likc growth factor)、睪固酮(Testosterone)及皮質醇(Cortisol)的濃度我於訓練前後進行肌力及爆發力測試，結果發現：PRI組其肌力及爆發力表現在訓練後顯著的提升，而TR組僅增加最大肌力，兩組間以變化百分比進行比較：PRI在肌力及爆發力的變化百分比皆顯著高於TR組。血液荷爾蒙的結果：第6週和第10週時之安靜生長激素、類胰島素生長因子、睪固酮及皮質醇的濃度，組內訓練前後相比並無顯著性的改變；PRI組與TR組兩組間安靜期的荷爾蒙濃度反應亦無差異。由本研究得知：為期10週之PRI訓練能有效的提升肌力以及爆發力之運動表現，然而安靜期的荷爾蒙於訓練前、中、後並無顯著的變化。

Effect of weightlifting training on jumping ability, sprinting performance and squat strength: A systematic review and meta-analysis

2021 ◽  
pp. 174795412110616
Author(s):  
Adrián García-Valverde ◽  
Agustín Manresa-Rocamora ◽  
José L Hernández-Davó ◽  
Rafael Sabido
Keyword(s):  
Systematic Review ◽  
Resistance Training ◽  
Meta Analysis ◽  
Vertical Jump ◽  
Maximal Strength ◽  
Countermovement Jump ◽  
Jump Performance ◽  
Strength Performance ◽  
Positive Effects ◽  
Traditional Resistance Training

This systematic review and meta-analysis aimed to assess the effect of using weightlifting movement and their derivatives in training on vertical jump, sprint times, and maximal strength performance. Thirty-four studies were used for meta-analysis with a moderate quality on the PEDro scale. Meta-analysis showed positive effects of weightlifting training, especially when combined with traditional resistance training on countermovement jump performance, sprint times, and one-repetition maximum squat (ES = 0.41, ES = −0.44, and ES = 0.81, respectively). In conclusion, results revealed the usefulness of weightlifting combined with traditional resistance training in improving sprint, countermovement jump and maximal strength performance.

Comparison of CrossFit Barbara and classic resistance trainings for the protection of strength performance during off-season in kickboxers

2020 ◽  
pp. 1-8
Author(s):  
Cebrail Gençoğlu ◽  
İlhan Şen
Keyword(s):  
Resistance Training ◽  
Body Mass ◽  
Body Fat ◽  
Bench Press ◽  
Body Fat Percentage ◽  
Fat Percentage ◽  
Strength Performance ◽  
Significant Difference ◽  
Before And After ◽  
Push Up

BACKGROUND: The inability of athletes to train or the decrease in the intensity and frequency of training may cause athletes to lose performance. Particularly in view of the current COVID-19 pandemic, maintaining strength outside the normal framework provides an advantage to athletes for the next competitions. OBJECTIVE: To compare the CrossFit Barbara which can be applied easily at home during the off-season or some situations such as the epidemic limitation to classic resistance training methods used to maintain the strength performance of national kickboxers. METHODS: Forty-three national kickboxers, CrossFit (CF, n= 22), and resistance training (RT, n= 21), participated in this study. While CF performed 20 pull-ups, 30 push-ups, 40 sit-ups, and 50 squat exercises, RT performed bench press, lat pull down, leg press, biceps curl, and triceps extension exercises twice per week for six weeks. Before and after the six weeks, the following variables were measured; body mass (BM) and body fat percentage (FP), VO2max, bench press (BP), squat (SQ), leg strength (LS), hand grip strength (HGS), pull-up, push-up and counter movement jump (CMJ). RESULTS: BP (p< 0.001, F= 41.125, ηp2= 0.501), SQ (p< 0.001, F= 26.604, ηp2= 0.394), LS (p< 0.001, F= 15.234, ηp2= 0.271), push-up (p< 0.001, F= 31.978, ηp2= 0.438) and pull-up (p< 0.001, F= 24.410, ηp2= 0.373) values changed significantly in group-time interaction between CF and RT groups, while there was no significant difference for the BM (p= 0.198, F= 1.715, ηp2= 0.040), Fat (p= 0.265, F= 1.279, ηp2= 0.030), HGS (p= 0.665, F= 0.190, ηp2= 0.005, CMJ (p= 0.054, F= 3.946, ηp2= 0.088) and VO2max (p=0.747, F= 0.106, ηp2= 0.003). Furthermore, according to the before and after study values, BP, SQ, LS, and CMJ decreased significantly (p< 0.05) while BM, FP, HGS, VO2max, pull-up and push-up variables did not in the CF (p> 0.05). In the RT, the pull-up and push-up variables decreased significantly (p< 0.05) while there was no significant difference for BP, SQ, LS, HGS, VO2max, body mass, body fat percentage and CMJ (p> 0.05). CONCLUSION: CF Barbara workout was more effective in maintaining strength endurance performances, and RT in maintaining maximum strength performances. According to the individual performance needs of athletes, reasonable training method can be used to prevent performance decrement in the strength domain.

scholarly journals Effects of Single versus Multiple Bouts of Resistance Training on Maximal Strength and Anaerobic Performance

2018 ◽  
Vol 62 (1) ◽  
pp. 231-240 ◽  
Author(s):  
Kai Shiau ◽  
Te Hung Tsao ◽  
Chang Bin Yang
Keyword(s):  
Resistance Training ◽  
Resistance Exercise ◽  
Bench Press ◽  
Upper Body ◽  
Anaerobic Performance ◽  
Maximal Strength ◽  
Post Intervention ◽  
Significant Difference ◽  
Single Bout ◽  
Before And After

Abstract This study examined the effects of one single bout daily versus triple bouts of resistance exercise for 12 weeks on muscular strength and anaerobic performance of the upper body. Twenty young male adults (age: 22.0 ± 1.0 years, bench press: 44.0 ± 10.3 kg) were randomly assigned to a single bout (SB) or triple bouts (TB) of resistance exercise group. Maximal strength and anaerobic performance of the upper body using the bench press (one-repetition maximum) and the modified 30 s Wingate test were determined before and after the intervention. Additionally, changes in lactate levels before and after the Wingate test were measured. Although the SB and TB groups showed a significant increase in maximal strength (post-intervention, SB: 67.2 ± 9.2 and TB: 67.6 ± 7.6 kg, respectively) compared with the values at pre-intervention (SB: 44.6 ± 11.4 and TB: 43.9 ± 8.7 kg, respectively), there was no significant difference for this variable between the two groups post-intervention (p > 0.05). The anaerobic performance of the upper body in the SB and TB groups also displayed improvements without significant difference between the two groups after the completion of different training regimes. On the basis of the same training volume, multiple bouts of resistance training showed similar improvements in maximal strength and anaerobic performance to one bout of resistance training in young adult men without prior experience in resistance training

scholarly journals Effects of creatine hydrochloride supplementation on physical performance and hormonal changes in soldiers

2021 ◽  
Vol 9 (1) ◽  
pp. 93-99
Author(s):  
Mohammad Milad Tayebi ◽  
Mitra Yousefpour ◽  
Laya Ghahari
Keyword(s):  
Physical Performance ◽  
Vertical Jump ◽  
Hormonal Changes ◽  
Power Performance ◽  
Mean Power ◽  
Wingate Anaerobic Test ◽  
Double Blind ◽  
Back Squat ◽  
Before And After ◽  
Army Soldiers

Purpose: The aim of this study was to examine the effects of 2 weeks of creatine hydrochloride (CrHCl) supplementation on physical performance and hormonal changes in army soldiers. Materials: Eighteen male army soldiers were randomly assigned in a double-blind fashion to either a CrHCl (n=9) or placebo (Pl) (n=9) groups. CrHCl group costumed 3g of creatine per day, whereas Pl group was given dextrose. Before and after supplementation period, the subjects performed a battery of performance tests including one repletion maximum (1RM) of bench press and back squat, vertical jump (VJ) and Wingate anaerobic test. In addition, blood samples were obtained to determine changes in testosterone and cortisol concentrations per and post supplementation. Results: There were significant increases in VJ, peak and mean power, and 1RM back squat test following the 2 weeks of CrHCl supplementation (p < 0.05) without any significant change for the Pl group. In addition significant changes were observed in testosterone and cortisol concentrations from before to after supplementation in CrHCl group (p < 0.05) and compared with Pl group (p=0.001). Conclusions: In conclusion, the present study indicates that CrHCl supplementation can improve VJ, power performance, 1RM back squat and hormonal changes in army soldiers.

scholarly journals Changes in Muscle Power and Muscle Morphology with Different Volumes of Fast Eccentric Half-Squats

Sports ◽  
2019 ◽  
Vol 7 (7) ◽  
pp. 164 ◽  
Author(s):  
Evangelia Zacharia ◽  
Polyxeni Spiliopoulou ◽  
Spyridon Methenitis ◽  
Angeliki-Nikoletta Stasinaki ◽  
Nikolaos Zaras ◽  
...  
Keyword(s):  
Muscle Power ◽  
Fiber Type ◽  
Vastus Lateralis ◽  
Power Performance ◽  
Fascicle Length ◽  
Cross Sectional ◽  
Muscle Morphology ◽  
Strength Performance ◽  
Type Composition ◽  
Before And After

The aim of the study was to evaluate power performance and muscle morphology adaptations in response to 5 weeks of fast-eccentric squat training (FEST) performed twice per week, with three different training volumes. Twenty-five moderately trained females were assigned into three groups performing eight repetitions of FEST of either four sets (4 × 8 group; N = 9), 6 sets (6 × 8 group; N = 8) or eight sets (8 × 8 group, N = 8). Before and after the intervention, countermovement jumping height (CMJh) and power (CMJp), half squat maximal strength (1-RM), quadriceps cross-sectional area (QCSA) and vastus lateralis (VL) architecture and fiber type composition were evaluated. Significant increases (p < 0.05) were found for all groups, with no differences among them in 1-RM (4 × 8: 14.8 ± 8.2%, 6 × 8: 13.1 ± 9.2% and 8 × 8: 21.6 ± 7.0%), CMJh (4 × 8: 12.5 ± 8.5%, 6 × 8: 11.3 ± 9.3% and 8 × 8: 7.0 ± 6.2%), CMJp (4 × 8: 9.1 ± 6.0%, 6 × 8: 7.1 ± 5.2% and 8 × 8: 5.0 ± 3.9%) and QCSA (4 × 8: 7.7 ± 4.7%, 6 × 8: 9.0 ± 6.8% and 8 × 8: 8.2 ± 6.5%). Muscle fiber type distribution remained unaltered after training in all groups. VL fascicle length increased and fascicle angle decreased only in 6 × 8 and 8 × 8 groups. In conclusion, four sets of eight fast-eccentric squats/week increase lower body power and strength performance and maintain type IIX muscle fibers after 5 weeks, at least in moderately trained females.

scholarly journals Undulatory physical resistance training program increases maximal strength in elderly type 2 diabetics

2014 ◽  
Vol 12 (4) ◽  
pp. 425-432 ◽  
Author(s):  
Gilberto Monteiro dos Santos ◽  
Fábio Tanil Montrezol ◽  
Luciana Santos Souza Pauli ◽  
Angélica Rossi Sartori-Cintra ◽  
Emilson Colantonio ◽  
...  
Keyword(s):  
Resistance Training ◽  
Knee Extension ◽  
Maximal Strength ◽  
Resistance Training Program ◽  
Specific Protocol ◽  
Before And After ◽  
Post Test ◽  
Biceps Pulley ◽  
Physical Resistance

ObjectiveTo investigate the effects of a specific protocol of undulatory physical resistance training on maximal strength gains in elderly type 2 diabetics.Methods The study included 48 subjects, aged between 60 and 85 years, of both genders. They were divided into two groups: Untrained Diabetic Elderly (n=19) with those who were not subjected to physical training and Trained Diabetic Elderly (n=29), with those who were subjected to undulatory physical resistance training. The participants were evaluated with several types of resistance training’s equipment before and after training protocol, by test of one maximal repetition. The subjects were trained on undulatory resistance three times per week for a period of 16 weeks. The overload used in undulatory resistance training was equivalent to 50% of one maximal repetition and 70% of one maximal repetition, alternating weekly. Statistical analysis revealed significant differences (p<0.05) between pre-test and post-test over a period of 16 weeks.Results The average gains in strength were 43.20% (knee extension), 65.00% (knee flexion), 27.80% (supine sitting machine), 31.00% (rowing sitting), 43.90% (biceps pulley), and 21.10% (triceps pulley).Conclusion Undulatory resistance training used with weekly different overloads was effective to provide significant gains in maximum strength in elderly type 2 diabetic individuals.

scholarly journals Effects of Pre-exhaustion Versus Traditional Resistance Training on Training Volume, Maximal Strength, and Quadriceps Hypertrophy

2019 ◽  
Vol 10 ◽  
Author(s):  
Thiago Barbosa Trindade ◽  
Jonato Prestes ◽  
Leônidas Oliveira Neto ◽  
Radamés Maciel Vitor Medeiros ◽  
Ramires Alsamir Tibana ◽  
...  
Keyword(s):  
Resistance Training ◽  
Training Volume ◽  
Maximal Strength ◽  
Traditional Resistance Training

Comparison of instability resistance training, traditional resistance training and plyometric training on athletic performance parameters

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Amit Kumar Amar ◽  
Shibili Nuhmani ◽  
Moazzam Hussain Khan ◽  
Melbin John ◽  
Shaji John Kachanathu ◽  
...  
Keyword(s):  
Resistance Training ◽  
Athletic Performance ◽  
Vertical Jump ◽  
P Value ◽  
Training Methods ◽  
Performance Parameters ◽  
Plyometric Training ◽  
Physically Active ◽  
Jump Test ◽  
Traditional Resistance Training

Abstract Objectives The objective of the study was to compare traditional resistance, instability resistance, and plyometric training methods on measures of athletic performance in healthy subjects. Methods Sixty five healthy, physically active male students were randomly assigned to the following groups: traditional resistance training (RT, n=22), instability training (IT, n=22), and plyometric training (PLY, n=21).Athletic performance parameters were assessed pre- and post-training using chair squat test, standing stork test, shuttle run test, t-test, and vertical jump test. Results General linear univariate model with baseline as covariate (ANCOVA) was used for analyzing the change in outcome from baseline to post-treatment. Statistically significant improvement was observed in all the athletic performance parameters in all three groups after seven weeks of training (p-value<0.05). The highest change in chair squat test was reported for RT compared to IT (p-value<0.001) and PLY (p-value<0.001). The change in standing stork test among the IT group was substantially higher than that among RT (p-value=0.007) but did not significantly differ from that among the PLY (p-value=0.27). No statistically significant difference was observed in post-test values of vertical jump test among three groups. The highest change in t-test and shuttle run test was reported for PLY compared to IT (p-value<0.001) and RT (p-value<0.001). Conclusions Based on the findings of this study, it is suggested that IT and PLY can be included with traditional RT to improve various aspects of athletic performance in healthy physically active individuals. The current study will give an insight to athletes, coaches, and trainers regarding utilization of appropriate training methods in enhancing athletic performance. However, further research is required to establish the effectiveness

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