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Showing 5 results for Strength Training
Effect of aerobic and strength training on serum PTH, calcium, albumin and alkaline phosphatase in postmenopausal women
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Volume 10, Issue 3 (6-2012)
Abstract

The purpose of this study was to consider the effect of eight weeks aerobic
and strength training on serum PTH, calcium, albumin and alkaline
phosphatase in postmenopausal women.35 post menopause women, (55-70
years), of Jahandidegan center of Tehran were selected and randomly divided
to three groups as aerobic (n=12), strength (n=13) and control (n=10) groups.
Aerobic training program include jogging and aerobic movements, with 60-
70% MHR intensity(8 weeks, 3 times per week, 40minute per session), And
Strength training program with emphasize on main muscle groups (8 weeks, 3
times per week, 1 hour per session),with30-40%1RM,8-10rep,1set to 60-
80%1RM,8-10rep,1set . One way analysis of variance (ANOVA) used to
compare differences between groups. The results showed that PTH and
alkaline phosphatase significantly increase after aerobic and strength training
in comparison with control group (P≤0.05). But the significant difference was
not observed between these two groups. No significant difference was
observed in serum calcium between two trained and control groups (p≥0.05).
However a significant decrease was observed in strength group (P≤0.05).
Furthermore, the significant change was not observed in albomin after training
program. Increase in PTH and alkaline phosphatase concentrations in normal
range seem to promote anabolism procedure of bone formation. The result of
this study shows that both two type of training have same effects on bone
markers and hormonal factors.


The Comparative Study of Effects of 4 Weeks Accommodation and Constant Load Strength Training Methods on Maximum Strength and Power of Trained Athletes
Jalil Ataei, Dr Mohammad Reza Dehkhoda, Dr Hamid Rajabi, Dr Naeima Khajavi, Sara Zarea Karizak,
Volume 12, Issue 8 (10-2014)
Abstract

The purpose of this study was to compare effect of 4 weeks of strength training in two ways of accommodation and constant resistant methods on maximum strength and power of trained athletes. Sixteen Wushu athletes and wrestlers chosen from Tehran’s clubs with a mean age of 20.50 ±2.00years, height 174.34 ± 6.53cm, weight 70.22 ± 10.50 Kg, and body fat percent, 12.87 ±. 4. 23 participated in this study. After the initial testing of the variables of maximum strength (1RM), upper body power (medicine ball to throw, cm) lower body power (vertical jump, watt) Body fat percent (Skin Fold three point), limb circumference (cm) and Weight (kg), divided in two equal groups. Each group has done resistance strength training program for 4 weeks, three sessions per week, with 85% of their 1RM, with three sets and 5 repetitions with Squat and bench press exercises. But in case of accommodation group, 20% of their 1RM was used by chain through the full range of motion. At the end of the training, re-test of dependent variables were performed under similar conditions. Covariance analysis was used to compare the progressof power and strength between the two groups. This study showed that weight (p=0.391), limb circumferences (P=143), fat (P=0.413), the upper body power (P=0.267), lower body power (P=0.252) and the maximum upper body strength (P=0. 803) there was no significant difference between groups, but in case of maximum strength of lower body (P=0.04) there was significant difference between the two groups. In analyzing the results, although most variables did not show significant difference, but the effects sizeanalyzing of groups showed that in upper body power (ES=0.62), lower body power (ES= 0.64),upper body strength (ES=0.13)and lower body strength (ES=1.84), the results were in favor of accommodation group. This difference in the maximal strength in accommodation group were (62.15% in the upper body, 68.38% lower body) and in constant strength group (86.14% in the upper body, 84.21% in the lower body) respectively. Also the effect size of power for accommodation group were (97.6% upper body, 61.6% lower body) and in constant group (16.4% upper body, 67.4% lower body), respectively. This study showed that in order to increase maximal strength and power, accommodation training method is more effective than traditional constant training.


Comparison of combined strength and feedback trainings on kinetic and functional factors in athletes with plyometric pattern
P Zalbeik, A Letafatkar, Sh Rezvan Nobahar,
Volume 18, Issue 19 (7-2020)
Abstract
Feedback instruction is a proven modality for the alteration of motion patterns. There are no existing data on the contribution of strength training, when combined with feedback instruction, to the altering of lower extremity biomechanics. Thus the purpose of the current study was comparison of strength training  program with external and internal focus of attention strategies on kinetic and functional factors in athletes with plyometric pattern. 36 athlete females (handball, Basketball and vollyball) voluntarily with avarage age 22.3±2.27 years were randomly assigned to strength training with external focus, strength training with internal focus and strength training groups. Participants completed these training for 8 weeks. Kinetic factors were measured using force plate during landing, as well as functional movement and movement pattern respectively were measured by single leg triple hop test (SLTH) and landing error scoring system. One-way analysis of variance (ANOVA) showed that the effect of strength training with external focus group training significantly was better than two others groups in Peak vertical ground reaction  (p=0.039), posterior ground reaction force (p=0.046), mediolateral time to stability (p=0.032), single leg triple hop test (p=0.041) and landing error scoring system  scores (p=0.030). But there was no significant between-group difference in anteroposterior time to stability (p=0.312). Subjects in strength training with external focus group showed significantly within-group changes in all variables except anteroposterior time to stability from posttest to pretest. Programs that include both strength training and movement education through external focus of attention may be necessary in order to prevent ACL injuries and increase athletic performance.

 

The Interactive Effect Of Six Weeks Of Resistance Training And Whey Protein Supplementation On PRAS40 Gene Expression And Muscle Hypertrophy In Male Wistar Race Rats
Fereshteh Shahidi, Hamide Ahmadi, Majid Kashef,
Volume 22, Issue 28 (12-2024)
Abstract
PRAS40 is expressed in all types of body tissues and is present in the muscle growth pathway and has multiple phosphorylation sites. Studies have shown that PRAS40 plays a role in regulating cell growth. The aim of this study was to evaluate the effect of six weeks of resistance training and whey protein supplementation on PRAS40 and biceps hypertrophy in male Wistar rats
Method:This developmental experimental study was carried out in 1402 year. 23 eight-week-old male Wistar rats (250 grams) were randomly divided into three groups: resistance training, resistance training+ supplement, and control. After two weeks of orientation, the training groups completed six weeks of resistance training, climbing the ladder five days a week. The training +supplement group received whey protein (2.05 g/kg dose) through gavage. 48 hours after the last training, a blood sample was taken and the gastrocnemius muscle was removed, frizzed, and saved to evaluate the expression of the PRAS40 gene.
Findings: Six weeks of resistance training with whey supplement caused a significant decrease in PRAS40 gene expression and an increase in body and muscle weight in the exercise and supplement + exercise groups.
Conclusion: The resistance training protocol along with her supplement can lead to muscle hypertrophy and activate the anabolic pathways in the muscle through the suppression of the PRAS40 pathway.

Comparison Of Effects Of two Type Resistance Exercises On Vertical Force And Impulse Caused By Diagonal Blows On The Spike Skill Of Female Volleyball Players
Mohsen Barghamadi, Roghayeh Parsa, Amir Fatollahi,
Volume 23, Issue 30 (1-2026)
Abstract
Background and Aims: Volleyball players apply force at short speed more oblique strokes to the ball so that it lands quickly on the ground.The aim of the present study is to compare the effects of two types of resistance training with cable and barbells on vertical force and impulse caused by oblique strokes in the spike of female volleyball.
Materials and Methods: The present study method was semi-experimental. The statistical population of this study included 45 female volleyball players from Mohaghegh University. The statistical samples was divided into three groups of 15 people in the training groups 1 with barbell, dumbbell, medicine­ training ­­tools, and groups 2 with­­  training with cable bodybulding equipment, and the third group in as control group. Force plate was used to record ground reaction forces.The table was used to adjust the height diagonal shots, the invisible string and the volleyball ball for the dominant hand shot volleyball players.
Results: The effects of the force resulting from the diagonal impact on the ball on the vertical ground reaction force were significant in the group1 (p< 0.008) and not significant in group 2 (p< 0.133).The effect of the impulse time factor in the strength training group on the vertical component of the ground reaction force was significant in group1 (P<0.030) and in group 2 (P<0.023).
Conclusion: combined strength training with barbell and medicine increases power in diagonal shots and produces maximum vertical force in a shorter time to the ball in diagonal spike shots in volleyball.


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