High-intensity Weight Training Research Articles

Investigating the Impact of Varied Dosages of Royal Jelly Consumption on Creatine Kinase and Interleukin-6 Levels Post High-Intensity Resistance Training

This study aimed to investigate the effects of ingesting royal jelly sports gel at doses of 1500 mg, 3000 mg, and 4500 mg after 48 hours of high-intensity weight training on creatine kinase (CK) and interleukin-6 (IL-6) levels. A total of 16 participants were recruited and randomly assigned to four groups: placebo, 1500 mg, 3000 mg, and 4500 mg of royal jelly sports gel. Blood samples were collected before and after the intervention to measure CK and IL-6 levels. The results revealed a significant reduction in CK and IL-6 levels in the 4500 mg royal jelly group compared to the placebo group. However, no significant changes were observed in the 1500 mg and 3000 mg groups. These findings suggest that the consumption of royal jelly sports gel at a dosage of 4500 mg may positively influence recovery processes after high-intensity weight training by mitigating muscle damage and inflammation. Further research is needed to elucidate the potential benefits and optimal dosages of royal jelly in enhancing exercise recovery. Keywords: Suplementation, Biomarkers, Royal Jelly, Fatique

Curcumin reduce creatine kinase (CK) levels without decreasing malondialdehyde (MDA) levels after 24 hours of high-intensity physical exercise

This study aims to analyze the effect of curcumin on serum levels of creatine kinase (CK) and malondialdehyde (MDA) after 24 hours of high-intensity physical exercise. This experimental study used a pre and post-control group design. A total of 18 healthy men with an average age of 23 years participated in this study. Subjects were selected using a random sampling technique and then the subjects were divided into 2 groups, namely the group given a placebo and the group given curcumin at a dose of 400 mg. On the first day, all subjects took data on the characteristics of the research subjects, and then the subjects did the high-intensity physical exercise in the form of squad and leg press exercises with an intensity of 80-90% of maximum ability. On the second day, after 24 hours, all subjects took pre-test data samples to measure serum CK and MDA levels, then the intervention was given based on their respective groups. On the third day, after 24 hours, all subjects took post-test blood samples to measure CK and MDA serum levels. Blood samples were analyzed in the laboratory using the ELISA method. The results of this study reported that the group given a placebo did not significantly reduce serum CK levels, while the group with curcumin at a dose of 400 mg could significantly reduce CK levels (p<0.05). Furthermore, there was no significant decrease in serum MDA levels in the placebo group or the curcumin group (p>0.05). It can be concluded that the administration of curcumin after 24 hours after high-intensity weight training was able to reduce serum CK levels without a decrease in MDA serum levels. Since the decrease in serum CK levels is an essential part of recovery during muscle damage. Therefore, curcumin is recommended to be taken after 24 hours after exercise to speed up recovery. Keywords: Curcumin; creatine kinase; malondialdehyde; muscle damage; free radicals; physical training

Effect of acute omega 3 supplementation reduces serum tumor necrosis factor-alpha (TNF-a) levels, pain intensity, and maintains muscle strength after high-intensity weight training

This study aims to analyze the acute effect of omega 3 supplementation on serum TNF-α levels, pain intensity, and muscle strength after high-intensity weight training. A total of 20 adult males with a BMI of 18.00-24.99 were enrolled in this study. Subjects were divided into 2 groups, namely (K1) with placebo and (K2) with omega 3 supplementation with a dose of 1000 mg (540 mg EPA and 360 mg DHA). The intervention was carried out 24 hours after high-intensity weight training. The data in this study were taken before and after the intervention. Measurement of serum TNF-α levels using a human ELISA kit, measurement of pain intensity using visual analog scale (VAS), measuring muscle strength using a leg dynamometer. The data analysis technique is used if the data is normally distributed, namely Paired t-test and Independent t-test, if the data has not normally distributed the analysis used is the Wilcoxon signed-rank test. Omega 3 supplementation significantly reduced serum TNF-α levels (p-0.035), significantly reduced pain levels (p-0.007), and did not significantly decrease the strength (p-0.100). Omega 3 supplementations can reduce serum TNF-α levels, pain intensity, and omega 3 supplementations can maintain muscle strength after high-intensity weight training as evidenced by the absence of a significant decrease in muscle strength after high-intensity weight training.

Mouthguard-effect of high-intensity weight training on masticatory muscle tone and stiffness in taekwondo athletes.

This study aimed to analyze the effect of wearing a mouthguard or not on masticatory muscle tone and stiffness of male taekwondo athletes during high-intensity weight training. The participants were male taekwondo athletes and aged 18 to 22 years. We randomly divided 24 men into the control group (CON; without a mouthguard; n=12) and the experimental group (MOG; with a mouthguard; n=12). Masticatory muscle tone and stiffness were measured after weight training at a level of 70% of one-repetition maximum. As a result of this study, masticatory muscle tone was no different in intragroup and intergroup after experiment. In addition, although the masticatory muscle stiffness was significantly higher in the dominant side of the MOG, there was no difference in intergroup, intragroup, and interaction. Through this study, it is necessary to consider the selective wearing of a mouthguard according to the training methods when partially analyzed from the physiological point of view of the masticatory muscle of taekwondo athletes.

고강도 웨이트트레이닝 시 정적회복 및 스트레칭 적용에 따른 생리적 반응의 비교

고강도 웨이트트레이닝 시 정적회복 및 스트레칭 적용에 따른 생리적 반응의 비교

Palm Cooling and Heating Delays Fatigue During Resistance Exercise In Women

We previously reported that cold application to the palms between sets of high-intensity bench press exercise produces an ergogenic effect in men. In this study, we hypothesized that palm cooling (PC) or heating during rest intervals between high-intensity weight training sets will increase total repetitions and exercise volume load (kilograms) in resistance trained female subjects in a thermoneutral (TN) environment. Eight female subjects (mean ± SD, age = 25 ± 6 years, height = 160 ± 6 cm, body mass = 56 ± 7 kg, 1-repetition maximum [1RM] = 52 ± 6 kg, weight training experience = 6 ± 2 years) completed 4 sets of 85% 1RM bench press exercise to failure, with 3-minute rest intervals. Exercise trials were performed in a counterbalanced order on 3 days, separated by at least 3 days in TN, Palm heating (PH), and PC conditions. Heating and cooling were applied by placing both hands in a hand cooling device with the hand plate set to 45° C for heating and 10° C for cooling. Data were analyzed using a 2-factor repeated-measures analysis of variance and Tukey's post hoc tests. Palm cooling repetitions were significantly higher than TN repetitions during the second set, and PH repetitions were significantly higher than those of TN during the fourth set. Total exercise volume load (kilograms) for both PC (1,387 ± 358) and PH (1,349 ± 267) were significantly higher than TN (1,187 ± 262). In women, both heating and cooling of the palms between sets of resistance exercise increased the total exercise volume load performed. This ergogenic response to a peripheral sensory input is consistent with the central governor theory of muscular fatigue.

Weight training is not harmful for women with breast cancer-related lymphoedema: a systematic review.

Is weight-training exercise intervention harmful to women with or at risk of breast cancer-related lymphoedema? Systematic review with meta-analysis of randomised trials. Women with or at risk of breast cancer-related lymphoedema. Progressive weight-training exercise. The primary outcomes were severity (volume difference) and incidence of arm lymphoedema. Secondary outcomes included muscle strength of the upper and lower limbs, quality of life and body mass index. Eleven studies from eight trials involving 1091 women were included. Weight-training exercise of low to moderate intensity with relatively slow progression significantly improved the upper limb strength (SMD 0.93, 95% CI 0.73 to 1.12) and lower limb strength (SMD 0.75, 95% CI 0.47 to 1.04) without increasing the arm volume (SMD -0.09, 95% CI -0.23 to 0.05) or incidence of breast cancer-related lymphoedema (RR 0.77, 95% CI 0.52 to 1.15). No significant effects were noted for body mass index (SMD -0.10, 95% -0.31 to 0.11). Some aspects of quality of life may improve with weight training. PARTICIPANTS in all trials used pressure garments and received supervision; no trials used high-intensity weight training. Weight training appears to be safe and beneficial in improving limb strength and physical components of quality of life in women with or at risk of lymphoedema. Pressure garments, supervision and limiting the intensity of the weight training may each be important, but this could not be confirmed with this review. PROSPERO CRD42012002737.

Muscle Strength and Qualitative Myosin Heavy Chain Isoform mRNA Expression in the Elderly after Moderate- and High-Intensity Weight Training

This study was an attempt to determine the effects of 12 weeks of moderate-intensity (MIEX) and high-intensity (HIEX) weight training on the muscular strength and qualitative myosin heavy chain (MHO isoform mRNA expression in 18 elderly men. Subjects were randomly assigned to either a control group (Con) or training groups of either MIEX or HIEX. Training sessions occurred 3 days/week and involved three sets of 15-20 repetitions at 60%-65% 1 -RM for MIEX and three sets of 8-10 repetitions at 75%-80% 1 -RM for HIEX. Both upper and lower body strength increased for Con and increased significantly for MIEX and HIEX. No changes in MHC mRNA isoform expression were observed for Con: however, there were increases in Type I MHC and decreases in Type IIx MHC mRNA expression for MIEX and increases in Type I, Ila, and IIx MHC mRNA expression for HIEX. The findings suggest that both moderate- and high-intensity weight training increases muscle strength and the expression of Type I MHC mRNA isoform. while high-intensity weight training also increases the mRNA expression of Type Ila and IIx isoforms in previously inactive elderly men.

MUSCLE STRENGTH AND MYOSIN HEAVY CHAIN mRNA EXPRESSION IN THE ELDERLY AFTER WEIGHT TRAINING

1099 The purpose of this study was to determine the effects of 12 weeks of low-(LIEX) and high-intensity (HIEX) weight training on the muscular strength and myosin heavy chain (MHC) mRNA isoform expression of 16 elderly men and women using RT-PCR. Subjects were randomly assigned to either a control group (CON), or training groups of either LIEX or HIEX. Training sessions occurred 3 days/week and involved 3 sets of 12-15 repetitions at 65% 1-RM for LIEX and 3 sets of 8-10 repetitions at 85% 1-RM for HIEX. For upper-body strength, results showed increases of 6.56% for CON, and significant increases of 46.09% and 52.83%, respectively, for LIEX and HIEX. There were also increases in lower-body strength of 3.48% for CON, and significant increases of 38.18% and 55.84% for LIEX and HIEX, respectively. There were significant increases in Type IIa MHC mRNA expression for LIEX and Type I and IIa for HIEX that were significantly correlated with the respective increases in lower-body strength while the Type IIx MHC isoform in LIEX and HIEX was significantly less than CON. This study suggests that both low- and high-intensity weight training produces similar increases in strength which seem to be related to respective increases in the expression of Type I and IIa MHC mRNA isoforms in elderly men and women.

Bone Mineral Density Responses to High-Intensity Strength Training in Active Older Women

The purpose of this investigation was to determine the effects of high-intensity strength training on bone mineral density (BMD) of 34 non-estrogen-repleted, active women over 60 years of age. The study was designed as a randomized, nonblinded trial in which subjects were stratified into rank-ordered pairs by level of physical activity, then randomly assigned into either a weight training (WT) or a control (CON) group. BMD of the spine (L2–L4), hip, and total body was assessed at 0, 6, and 12 months by dual energy x-ray absorptiometry. Group-by-time repeated-measures ANOVA demonstrated no effect of weight training on BMD, despite marked gains in muscular strength for all exercises. The high-intensity weight training utilized in this study did not induce positive changes in BMD of the hip and spine of previously active, non-estrogen-repleted older women. However, the protocol was safe, enjoyable, and highly effective in increasing muscular strength.

Training: High intensity weight training for individualized physical fitness

Training: High intensity weight training for individualized physical fitness

NSCA Funded Research: The Response of Selected Physiological Variables and Perceived Exertion to High Intensity Weight Training in Highly Trained and Beginning Weight Trainers

NSCA Funded Research: The Response of Selected Physiological Variables and Perceived Exertion to High Intensity Weight Training in Highly Trained and Beginning Weight Trainers