Effect of Acute Potassium-Magnesium Aspartate Supplementation on Ammonia Concentrations during and after Resistance Training

1995 ◽  
Vol 5 (2) ◽  
pp. 102-109 ◽  
Author(s):  
Jay L. Tuttle ◽  
Jeffrey A. Potteiger ◽  
Blanche W. Evans ◽  
John C. Ozmun
Keyword(s):  
Resistance Training ◽  
Vitamin C ◽  
High Intensity ◽  
Bench Press ◽  
Double Blind ◽  
Trained Subjects ◽  
Plasma Ammonia ◽  
Repetition Maximum ◽  
Mean Differences ◽  
Potassium Magnesium

This study examined the effects of aspartate supplementation (ASP) on plasma ammonia concentrations ([]) during and after a resistance training workout (RTW). Twelve male weight trainers were randomly administered ASP or vitamin C in a crossover, double blind protocol, each trial separated by 1 wk. ASP and vitamin C were given over a 2-hr period beginning 5 hr prior to the RTW. The RTW consisted of bench, incline, shoulder, and triceps presses, and biceps curls at 70% of one repetition maximum (1-RM). After the RTW a bench press test (BPT) to failure at 65% of 1-RM was used to assess performance. [] was determined preexercise, 20 and 40 min midworkout, immediately postexercise, and 15 min postexercise. Treatment-by-time ANOVAs, pairedttests, and contrast comparisons were used to identify mean differences. No significant differences were observed between treatments for [] or BPT. [] increased significantly from Pre to immediately postexercise for both the ASP and vitamin C trials. Acute ASP supplementation does not reduce [] during and after a high intensity RTW in weight trained subjects.

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.

Caffeine-Induced Changes in Cardiovascular Function during Resistance Training

2007 ◽  
Vol 17 (5) ◽  
pp. 468-477 ◽  
Author(s):  
Todd Anthony Astorino ◽  
Riana Lee Rohmann ◽  
Kelli Firth ◽  
Sondra Kelly
Keyword(s):  
Blood Pressure ◽  
Heart Rate ◽  
Resistance Training ◽  
Bench Press ◽  
Cardiovascular Function ◽  
Strenuous Exercise ◽  
Rate Pressure Product ◽  
Double Blind ◽  
Warm Up ◽  
Leg Press

Caffeine (CAF) exerts a pressor effect both at rest and during exercise, as blood pressure is higher than with placebo. The effect of acute CAF ingestion combined with intense resistance training on cardiovascular function is unknown, however. The primary aim of the study was to examine changes in cardiovascular function after completion of fatiguing bench-press and leg-press exercise after CAF or placebo ingestion. Twenty-two resistance-trained men ingested CAF (6 mg/kg) or placebo 1 h pre exercise in a randomized, double-blind crossover design. They refrained from CAF intake and strenuous exercise 48 and 24 h pretrial, respectively. Heart rate and blood pressure were measured pre exercise. After a standardized warm-up, 1-repetition-maximum (1-RM) on the barbell bench press and leg press was tested. When it had been determined, a load equivalent to 60% of 1-RM was placed on the bar, and the subject completed repetitions to failure. Measurements of heart rate and blood pressure were immediately completed, and mean arterial pressure and rate-pressure product were calculated. Results showed significant (P < 0.05) increases in heart rate (+ 10 beats/min), systolic blood pressure (+ 8–10 mmHg), and rate-pressure product with acute CAF ingestion versus placebo. No change (P > 0.05) in diastolic blood pressure across time or treatment was shown. To prevent elevated blood pressure and potential enhanced risk of heart disease, CAF intake should be monitored in at-risk men who participate in resistance training.

scholarly journals Acute Effects of High Doses of Caffeine on Bar Velocity during the Bench Press Throw in Athletes Habituated to Caffeine: A Randomized, Double-Blind and Crossover Study

2021 ◽  
Vol 10 (19) ◽  
pp. 4380
Author(s):  
Aleksandra Filip-Stachnik ◽  
Michal Krzysztofik ◽  
Juan Del Coso ◽  
Michal Wilk
Keyword(s):  
Bench Press ◽  
Experimental Session ◽  
Acute Effects ◽  
Mean Velocity ◽  
Double Blind ◽  
Repetition Maximum ◽  
Randomized Experimental Design ◽  
Bar Velocity ◽  
High Doses ◽  
Acute Intake

Chronic intake of caffeine may produce a reduction in the potential performance benefits obtained with the acute intake of this substance. For this reason, athletes habituated to caffeine often use high doses of caffeine (≥9 mg/kg) to overcome tolerance to caffeine ergogenicity due to chronic intake. The main objective of the current investigation was to evaluate the effects of high caffeine doses on bar velocity during an explosive bench press throw in athletes habituated to caffeine. Twelve resistance-trained athletes, with a moderate-to-high chronic intake of caffeine (~5.3 mg/kg/day) participated in a randomized double-blind and randomized experimental design. Each participant performed three identical experimental sessions 60 min after the intake of a placebo (PLAC) or after the intake of 9 (CAF-9) or 12 mg/kg (CAF-12) of caffeine. In each experimental session, the athletes performed five sets of two repetitions of the bench press throw exercise with a load equivalent to 30% of their one-repetition maximum. In comparison to PLAC, the intake of caffeine increased peak and mean velocity (p < 0.01) during the five sets of the bench press throw exercise. There were no significant differences in peak and mean bar velocity between the two doses of caffeine (CAF-9 vs. CAF-12; p = 0.91, = 0.96, respectively). The ingestion of high doses of caffeine was effective in producing an increase in mean and peak bar velocity during the bench press throw in a group of habitual caffeine users. However, using CAF-12 did not offer additional benefits for performance with respect to CAF-9.

scholarly journals The effect of self-selecting the number of repetitions on motor performance and psychological outcomes

2020 ◽  
Author(s):  
Aviv Emanuel ◽  
Itai Har-Nir ◽  
Itzhak Rozen Smukas ◽  
Israel Halperin
Keyword(s):  
Motor Performance ◽  
Bench Press ◽  
Force Production ◽  
Psychological Outcomes ◽  
The Self ◽  
Considerable Variability ◽  
Trained Subjects ◽  
Repetition Maximum ◽  
Bar Velocity

In resistance-training, the number of repetitions can be either fixed and predetermined (e.g., 3 sets of 10 repetitions), or selected by the trainee during ongoing sets (e.g., 3 sets of 8-12 repetitions). The first approach is more goal-focused while the latter is more autonomy-focused. Here we compared between these two approaches on motor performance and psychological outcomes. Nineteen resistance-trained subjects (10-males) first completed one repetition-maximum (RM) tests in the barbell-squat and bench-press, and were familiarized with the isometric mid-thigh pull (IMTP). In the next two counterbalanced sessions, subjects completed two sets of the squat and bench-press using 70%1RM, and two sets of the IMTP. In the predetermined session, subjects completed 10 repetitions in all sets, and in the self-selected session, subjects chose how many repetitions to complete out of an 8-12 range. Bar-velocity was measured in the squat and bench-press, and force production in the IMTP. Enjoyment, perceived-autonomy, and approach-preferences were collected post-sessions. We observed comparable bar-velocity, force production, and enjoyment in both conditions (all BF01&gt;2.1), and an even approach-preferences split. However, in the self-selected condition, subjects demonstrated considerable variability in the number of repetitions and reported greater perceived-autonomy. Given the similarities between approaches, both can be used with this cohort based on their personal-preference. Yet, we note that the self-selected approach has two distinct benefits: the variability in the number of repetitions completed suggests that subjects regulated their efforts, and the higher perceived autonomy could lead to long-term improvements in motor and psychological outcomes.

scholarly journals How one feels during resistance exercises: A repetition by repetition analysis across exercises and loads

2019 ◽  
Author(s):  
Aviv Emanuel ◽  
Itzhak Rozen Smukas ◽  
Israel Halperin
Keyword(s):  
Resistance Training ◽  
Bench Press ◽  
Affective Valence ◽  
Trained Subjects ◽  
Task Failure ◽  
Position Transducer ◽  
Feeling Scale ◽  
Resistance Exercises ◽  
Bar Velocity

Purpose: The feeling scale (FS) is a unique and underexplored scale in sport sciences that measures affective valence. FS has the potential to be used in athletic environments as a monitoring and prescription tool. We sought to examine whether FS ratings, as measured on a repetition-by-repetition basis, can predict proximity to task-failure and bar velocity across different exercises and loads. Methods: On the first day, 20 trained subjects (10 females) completed 1RM tests in the barbell bench and squat exercises and were introduced to the FS. On the following three sessions, subjects completed three sets to task-failure with either 1) 70%1RM bench-press, 2) 70%1RM squat (squat-70%), or 3) 80%1RM squat (squat-80%). Sessions were completed in a randomized, counter-balanced order. After every completed repetition, subjects verbally reported their FS ratings. Bar velocity was measured via linear position transducer. Results: FS ratings predicted failure-proximity and bar velocity in all three conditions (p&lt;0.001, R2 range: 0.66-0.85). Specifically, a reduction of one unit in the FS corresponded to approaching task-failure by 14%, 11% and 11%, and to a reduction in bar velocity of 10%, 4% and 3%, in the bench, squat-70% and squat-80%, respectively. Conclusion: This is the first study to investigate if the FS can be used in RT environments among trained subjects, on a repetition-by-repetition basis. The results show strong predictive abilities of the FS, indicating that the scale can be used to monitor and prescribe resistance training, and that its benefits should be further explored.

scholarly journals The Effects of the Movement Tempo on the One-Repetition Maximum Bench Press Results

2020 ◽  
Vol 72 (1) ◽  
pp. 151-159 ◽  
Author(s):  
Michal Wilk ◽  
Artur Golas ◽  
Piotr Zmijewski ◽  
Michal Krzysztofik ◽  
Aleksandra Filip ◽  
...  
Keyword(s):  
Resistance Training ◽  
Repeated Measures ◽  
Bench Press ◽  
Trial And Error ◽  
Training Experience ◽  
Test Procedures ◽  
Test Protocol ◽  
Repetition Maximum ◽  
One Year ◽  
The One

AbstractDifferent tempos of movement can be used during resistance training, but programming them is often a trial-and-error practice, as changing the speed at which the exercise is performed does not always correspond with the tempo at which the 1-repetition-maximum occurred. Therefore, the aim of this study was to determine the effect of different movement tempos during the bench press (BP) exercise on the one-repetition maximum (1RM) load. Ninety men (age = 25.8 ± 5.3 years, body mass = 80.2 ± 14.9 kg), with a minimum one year of resistance training experience took part in the study. Using a randomized crossover design, each participant completed the BP 1RM test with five different movement tempos: V/0/V/0, 2/0/V/0, 5/0/V/0, 8/0/V/0 and 10/0/V/0. Repeated measures ANOVA compared the differences between the 1RM at each tempo. The 1RM load was significantly greater during V/0/V/0 and 2/0/V/0 compared to 5/0/V/0, 8/0/V/0, and 10/0/V/0 (p < 0.01). Furthermore, the 1RM load was significantly greater during 5/0/V/0 compared to 8/0/V/0 and 10/0/V/0 (p < 0.01), but there were no differences between either V/0/V/0 and 2/0/V/0 (p = 0.92) or between 8/0/V/0 and 10/0/V/0 (p = 0.08). Therefore, different movement tempos used during training should be accompanied by their own tempo-specific 1RM testing, as slower eccentric phases significantly decrease maximal concentric performance. Furthermore, 1RM test procedures should include information about the movement tempo used during the test protocol. In addition, the standardization of the tempo should be taken into account in investigations that use the 1 RM test to assess the effects of any treatment on maximal muscle strength.

scholarly journals Effects of Supplementation of a Pre-workout on Power Maintenance in Lower Body and Upper Body Tasks in Women

2019 ◽  
Vol 4 (2) ◽  
pp. 18 ◽  
Author(s):  
Michael Timothy Lane ◽  
Mark Travis Byrd ◽  
Zachary Bell ◽  
Tyler Hurley
Keyword(s):  
High Intensity ◽  
Bench Press ◽  
Vertical Jump ◽  
Power Production ◽  
Upper Body ◽  
Maximal Velocity ◽  
Lower Body ◽  
Fat Percentage ◽  
Double Blind ◽  
Jump Performance

Currently there is a lack of research into how women respond to pre-workout supplementation. The effects of supplements on exercise performance in women, specifically to power, must be performed. This study investigated the effects of supplementation on power production and maintenance during a high-intensity cycle ergometry sprint performance, vertical jump performance, and bench press performance in women. It also investigated the effects of supplementation on power production and the maintenance of upper and lower body tasks in women. A total of 23 females (22.9 ± 3.6 years, 175.6 ± 6.5 cm, 86.9 ± 15.1 kg, 19.1 ± 8.4 body fat percentage (BF%) (mean ± std. dev.)) were familiarized with the testing protocol and maximal bench press performances were attained (49.5 ± 15.4kg). Utilizing a double-blind crossover design, subjects completed three trials of: Five countermovement vertical jumps, a high-intensity cycle sprint protocol, which consisted of 10 maximal, five second cycle ergometer sprints. Subjects performed a velocity bench press test, utilizing 80% of their predetermined one repetition maximum (1RM) for 10 sets of three repetitions for maximal speed. For 20 min prior to each trial, the subjects ingested, in a randomized order, a pre-workout supplement (Supp), placebo+150 mg caffeine (Caff), or a placebo (PL). Peak power (PP), mean power (MP), and minimum power (MNP) were recorded for each sprint. Maximal velocity from each set was also recorded. Bike sprint and bench press data were normalized to the placebo trial for analysis. Blood lactate (bLa−) was measured immediately prior to each testing session, within 2 min of the completion of the last cycle sprint and following the bench press test. Bike sprint and bench press testing showed no significant differences through the testing sessions, but did significantly decline over test battery (p < 0.05). Vertical jump performance and lactate levels were not significantly different. Supplementation with a pre-workout supplement or placebo with caffeine 20 min prior to participation showed no positive benefits to performance in female participants.

scholarly journals The role of volume-load in strength and absolute endurance adaptations in adolescent’s performing high- or low-load resistance training

2017 ◽  
Vol 42 (2) ◽  
pp. 193-201 ◽  
Author(s):  
James Steele ◽  
James P. Fisher ◽  
Ari R. Assunção ◽  
Martim Bottaro ◽  
Paulo Gentil
Keyword(s):  
Resistance Training ◽  
Bench Press ◽  
Load Resistance ◽  
Effect Sizes ◽  
Group Differences ◽  
Muscular Endurance ◽  
Repetition Maximum ◽  
Volume Load ◽  
Low Load

This study compared high- (HL) and low-load (LL) resistance training (RT) on strength, absolute endurance, volume-load, and their relationships in untrained adolescents. Thirty-three untrained adolescents of both sexes (males, n = 17; females, n = 16; 14 ± 1 years) were randomly assigned into either (i) HL (n = 17): performing 3 sets of 4–6 repetitions to momentary concentric failure; or (ii) LL (n = 16): performing 2 sets of 12–15 repetitions to momentary concentric failure. RT was performed for 2×/week for 9 weeks. Change in maximum strength (1 repetition maximum) and absolute muscular endurance for barbell bench press was assessed. Weekly volume-load was calculated as sets (n) × repetitions (n) × load (kg). Ninety-five percent confidence intervals (CIs) revealed that both groups significantly increased in strength and absolute endurance with large effect sizes (d = 1.51–1.66). There were no between-group differences for change in strength or absolute endurance. Ninety-five percent CIs revealed that both groups significantly increased in weekly volume-load with large effect sizes (HL = 1.66, LL = 1.02). There were no between-group differences for change in volume-load though average weekly volume-load was significantly greater for LL (p < 0.001). Significant Pearson’s correlations were found for the HL group between average weekly volume-load and both strength (r = 0.650, p = 0.005) and absolute endurance (r = 0.552, p = 0.022) increases. Strength and absolute endurance increases do not differ between HL and LL conditions in adolescents when performed to momentary concentric failure. Under HL conditions greater weekly volume-load is associated with greater strength and absolute endurance increases.

scholarly journals Comparison of Post-Exercise Hypotension Responses in Paralympic Powerlifting Athletes after Completing Two Bench Press Training Intensities

Medicina ◽  
2020 ◽  
Vol 56 (4) ◽  
pp. 156
Author(s):  
Ângelo de Almeida Paz ◽  
Felipe José Aidar ◽  
Dihogo Gama de Matos ◽  
Raphael Fabrício de Souza ◽  
Marzo Edir da Silva-Grigoletto ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Resistance Training ◽  
Exercise Training ◽  
High Intensity ◽  
Bench Press ◽  
National Level ◽  
Random Order ◽  
Double Product ◽  
Post Exercise ◽  
Post Exercise Hypotension

Background and objective: Post-exercise hypotension, the reduction of blood pressure after a bout of exercise, is of great clinical relevance. Resistance exercise training is considered an important contribution to exercise training programs for hypertensive individuals and athletes. In this context, post-exercise hypotension could be clinically relevant because it would maintain blood pressure of hypertensive individuals transiently at lower levels during day-time intervals, when blood pressure is typically at its highest levels. The aim of this study was to compare the post-exercise cardiovascular effects on Paralympic powerlifting athletes of two typical high-intensity resistance-training sessions, using either five sets of five bench press repetitions at 90% 1 repetition maximum (1RM) or five sets of three bench press repetitions at 95% 1RM. Materials and Methods: Ten national-level Paralympic weightlifting athletes (age: 26.1 ± 6.9 years; body mass: 76.8 ± 17.4 kg) completed the two resistance-training sessions, one week apart, in a random order. Results: Compared with baseline values, a reduction of 5–9% in systolic blood pressure was observed after 90% and 95% of 1RM at 20–50 min post-exercise. Furthermore, myocardial oxygen volume and double product were only significantly increased immediately after and 5 min post-exercise, while the heart rate was significantly elevated after the resistance training but decreased to baseline level by 50 min after training for both training conditions. Conclusions: A hypotensive response can be expected in elite Paralympic powerlifting athletes after typical high-intensity type resistance-training sessions.

scholarly journals Acute Effects of a Percussive Massage Treatment on Movement Velocity during Resistance Training

2021 ◽  
Vol 18 (15) ◽  
pp. 7726
Author(s):  
Manuel García-Sillero ◽  
Jose Manuel Jurado-Castro ◽  
Javier Benítez-Porres ◽  
Salvador Vargas-Molina
Keyword(s):  
Resistance Training ◽  
Bench Press ◽  
Therapy Group ◽  
Control Group ◽  
Acute Effects ◽  
Movement Velocity ◽  
Repetition Maximum ◽  
Rest Periods ◽  
Massage Treatment ◽  
Male University Students

The aim of this research was to verify whether the application of percussion therapy during inter-set rest periods increases the number of repetitions performed before reaching a 30% velocity loss threshold during a bench press exercise. Methods: Twenty-four male university students participated in this study (24.3 ± 1.3 years; 77.5 ± 8.3 kg; 177.0 ± 5.6 cm; 24.7 ± 2.6 kg∙m−2). Participants were randomized into two groups: a percussion therapy group (PTG) and a control group (CG). They performed 4 sets at 70% of a one-repetition maximum before reaching a 30% velocity loss threshold with an inter-set recovery of 3 min. Results: The PTG performed a greater total number of repetitions compared to the CG (44.6 ± 4.8 vs. 39.5 ± 6.8; p = 0.047; ES = 0.867). No differences were observed for the different movement velocity variables and fatigue control (p > 0.05). Conclusions: Percussion therapy is an effective method to delay the loss of movement velocity in the bench press exercise.

Sign in / Sign up

Export Citation Format

Share Document