Caffeine Supplementation or Carbohydrate Mouth Rinse Improves Performance

2020 ◽  
Author(s):  
Paulo Eduardo Assis Pereira ◽  
Paulo Azevedo ◽  
Katia Azevedo ◽  
Warleyson Azevedo ◽  
Marco Machado
Keyword(s):  
Resistance Training ◽  
Strength Training ◽  
Repeated Measures ◽  
Perceived Exertion ◽  
Mouth Rinse ◽  
Training Volume ◽  
Improve Performance ◽  
Double Blind ◽  
Physically Active ◽  
Rate Of Perceived Exertion

AbstractTraining volume is one of the critical variables required to promote resistance training benefits (e. g., hypertrophy, muscular strength). Thus, strategies to improve training volume are required. We tested the hypothesis that there is an increase in performance and reduction in the rate of perceived exertion in strength training with caffeine supplementation, carbohydrate mouth rinse, and a synergistic effect of caffeine supplementation plus carbohydrate mouth rinse. We recruited 29 physically active women: 24±4 years, 60.0±7.9 kg, 161.0±6.0 cm. This study was a double-blind, randomized, placebo-controlled, and crossover one. The subjects performed all sessions of strength training under different conditions: caffeine (6.5 mg·kg−1 body mass); carbohydrate (6 g of maltodextrin rinsed for 10 s); caffeine plus carbohydrate; or placebo. We applied the ANOVA for repeated measures through the null-hypothesis statistical test, and the Bayes factors analyses approach. The subjects showed significant improvement in the total repetitions (P<0.01; BF10 ~99%) for both lower and upper limb exercises in all conditions compared to placebo without difference among interventions. The rate of perceived exertion (P>0.05) did not differ among interventions. However, BF10 analyses showed a higher probability of lower RPE for CAF intervention. We conclude that either caffeine supplementation or carbohydrate mouth rinse can improve performance in resistance training. There is no additional effect of caffeine plus carbohydrate.

Effects of Caffeine on Repetitions to Failure and Ratings of Perceived Exertion During Resistance Training

2007 ◽  
Vol 2 (3) ◽  
pp. 250-259 ◽  
Author(s):  
J. Matt Green ◽  
P. Jason Wickwire ◽  
John R. McLester ◽  
Shawn Gendle ◽  
Geoffrey Hudson ◽  
...  
Keyword(s):  
Resistance Training ◽  
High Intensity ◽  
Repeated Measures ◽  
Perceived Exertion ◽  
Training Session ◽  
Mechanisms Of Action ◽  
Ratings Of Perceived Exertion ◽  
Double Blind ◽  
Significant Difference ◽  
Ergogenic Effects

Context:Ergogenic effects of caffeine on aerobic or endurance exercise are well documented. Conversely, the ergogenic value of caffeine on high-intensity, primarily anaerobic performance is not well understood even though the proposed mechanisms of action for caffeine permit a strong theoretical basis for application to this type of exercise.Purpose:This study examined effects of caffeine (Ca) on number repetitions (reps), ratings of perceived exertion (RPE), and peak heart rate (PHR) during resistance-training exercise with reps performed to volitional failure.Methods:Subjects (N = 17) were tested for 10-rep maximum in bench press (BP) and leg press (LP). In sessions 2 and 3, Ca (~6 mg/kg) or placebo (Pl) was ingested 1 hr beforehand in a double-blind manner and counterbalanced order. Subjects performed 3 sets to failure (BP and LP) with reps, PHR, and RPE recorded each set. Repeated-measures ANOVAs, 2 (trial) × 3 (set), were used to analyze dependent measures with the Tukey honestly significant difference used when necessary as the post hoc test.Results:In BP, no significant differences (Ca vs Pl) were observed (reps, RPE, PHR). During set 3 of LP training, Ca was associated with significantly higher reps (12.5 ± 4.2 vs 9.9 ± 2.6) and PHR (158.5 ± 11.9 vs 151.8 ± 13.2). No signifcant RPE differences were found during LP.Conclusions:The findings of similar RPE concurrent with higher reps suggest that caffeine can blunt pain responses, possibly delaying fatigue in high-intensity resistance training. Ergogenic effects might be limited to the later sets in a resistance-training session. Further research is warranted regarding ergogenic effects of caffeine during resistance training and potential mechanisms of action.

scholarly journals What Is the Optimal Strength Training Load to Improve Swimming Performance? A Randomized Trial of Male Competitive Swimmers

2021 ◽  
Vol 18 (22) ◽  
pp. 11770
Author(s):  
Sofiene Amara ◽  
Emmet Crowley ◽  
Senda Sammoud ◽  
Yassine Negra ◽  
Raouf Hammami ◽  
...  
Keyword(s):  
Resistance Training ◽  
Strength Training ◽  
Bench Press ◽  
Swimming Performance ◽  
Training Volume ◽  
Front Crawl ◽  
Leg Extension ◽  
Low Resistance ◽  
Volume Load ◽  
Competitive Swimmers

This study aimed to compare the effectiveness of high, moderate, and low resistance training volume-load of maximum strength training on muscle strength and swimming performance in competitive swimmers. Thirty-three male swimmers were randomly allocated to high (age = 16.5 ± 0.30 years), moderate (age = 16.1 ± 0.32 years) and a low resistance training volume-load group (age = 15.9 ± 0.31). This study was carried out in mid-season (January to March). Pre and post strength (e.g., repetition maximum [1RM] leg extension and bench press tests), swimming (25, 50 m front-crawl), start (speed, time, distance) and turn (time of turn) performance tests were conducted. Our findings revealed a large main effect of time for 1RM bench press: d = 1.38; 1RM leg extension: d = 1.55, and for 25 (d = 1.12), and 50 m (d = 1.97) front-crawl, similarly for start and turn performance (d = 1.28–1.46). However, no significant Group × Time interactions were shown in all strength swimming performances, start and turn tests (p > 0.05). In conclusion, low training loads have been shown to elicit the same results as moderate, and high training loads protocol. Therefore, this study shows evidence that the addition of low training volume-loads as a regular part of a maximal strength training regime will elicit improvements in strength and swimming performance.

Carbohydrate mouth rinsing improves resistance training session performance

2018 ◽  
Vol 13 (5) ◽  
pp. 804-809 ◽  
Author(s):  
Luciana S Decimoni ◽  
Victor M Curty ◽  
Livia Almeida ◽  
Alexander J Koch ◽  
Jeffrey M Willardson ◽  
...  
Keyword(s):  
Resistance Exercise ◽  
Exercise Performance ◽  
Repeated Measures ◽  
Perceived Exertion ◽  
Bench Press ◽  
Statistical Significance ◽  
Training Session ◽  
Rating Of Perceived Exertion ◽  
Double Blind ◽  
Mouth Rinsing

We investigated the effect of carbohydrate mouth rinsing on resistance exercise performance. Fifteen recreationally trained women (age 26 ± 4 y; height 1.61.9 ± 5.1 m; weight 59.5 ± 8.2 kg) completed two resistance exercise bouts consisting of three sets of five exercises (half-squat, leg press, bench press, military press, and seated row) to volitional fatigue with a 10 repetition-maximum load. Immediately prior to and during the middle of each exercise bout, subjects mouth rinsed for 10 s with 100 mL of either a 6% maltodextrin solution (CHO) or an artificially flavored solution (PLA) in a randomized, double-blind, counterbalanced fashion. Heart rate and perceived exertion were compared between conditions using a 2 (conditions) × 15 (time points) repeated measures ANOVA. Significant main effects were further analyzed using pairwise comparisons with Bonferroni post hoc tests. Total volume (exercises * sets * repetitions * load) between sessions was compared with a Student’s t-test. Statistical significance was set at p ≤ 0.05 level of confidence. The CHO resulted in more repetitions performed during half-squat, bench press, military press, and seated row, for a significantly greater (∼12%) total volume load lifted versus PLA ( p = 0.039, ES: 0.49). Rating of perceived exertion was also significantly lower in the CHO versus PLA ( p = 0.020, ES: 0.28). These data indicate that CHO mouth rinsing can enhance high-volume resistance exercise performance and lower ratings of perceived exertion.

scholarly journals The Effects of Protein and Carbohydrate Supplementation on Muscular Regeneration After Intense Resistance Training in Soccer Players

2020 ◽  
Vol 4 (Supplement_2) ◽  
pp. 1756-1756
Author(s):  
Eduard Isenmann ◽  
Patrick Diel ◽  
Stephan Geisler ◽  
Thorsten Schiffer
Keyword(s):  
Placebo Group ◽  
Resistance Training ◽  
Strength Training ◽  
Muscle Damage ◽  
Soccer Players ◽  
Physiological Parameter ◽  
Functional Markers ◽  
Positive Trend ◽  
Double Blind ◽  
Positive Effects

Abstract Objectives Nutrition is a key element in post-exercise regeneration. Various studies suggest that ingestion of combined carbohydrates and proteins after exercise result in a decrease of inflammatory processes and consequently in an increase of regeneration and physical performance. Recent studies compared the pro-regenerative effects of protein/carbohydrate shakes with the intake of foodstuffs (white bread and high protein cheese) on the skeletal muscle after acute endurance exercise. The aim of this study was to evaluate the influence of a conventional curd/juice shake on the regenerative capacity of soccer players after intensive strength training. Methods Therefore, sixteen young healthy in-season football payers run through a placebo checked double-blind crossover study with two groups. After a standardized training protocol, 3 sets of 12 reps deep back squats and 3 sets of 15 reps drop jumps, the participants ingested either a placebo shake (placebo-group, total calories &lt; 10 kcal) or a conventional shake of 300 g curd and 200 ml grape juice (protein 35.8 g, carbohydrates 43.6 g, fat 0.9 g, total calories 338 kcal). To evaluate the muscle damage effects, serum creatin kinase (CK) as a physiological parameter as well 10 m sprint, counter movement jump (CMJ) and 3RM-squat as functional markers were measured at two time points (t0, t24). In addition, the CK of five players was analysed after a soccer match. Results The results show a positive trend concerning sprint and squat performance in the shake group. Especially in the squat group a significant decrease of performance was observed in the placebo group compared to the shake group (PL: −5.0 kg, P ≤ 05, SH: −3,2 kg, P = .10). In CMJ and CK no difference was observed between the two groups. In both groups, the jump in CMJ decreased and the CK value increased significantly. The increase in CK due to intensive resistance training is also comparable to the muscle damage after a football match. Conclusions In summary, it was found that a quark/juice shake has a positive influence on strength performance in soccer players after intensive strength training. These findings confirm observations from previous studies. However, the positive effects on CK could not be observed in this study. Therefore, further research on conventional foodstuff after resistance training is necessary. Funding Sources No funding.

The acute effects of a low and high dose of oral l-arginine supplementation in young active males at rest

2011 ◽  
Vol 36 (3) ◽  
pp. 405-411 ◽  
Author(s):  
Scott C. Forbes ◽  
Gordon J. Bell
Keyword(s):  
Body Mass ◽  
Repeated Measures ◽  
Plasma Concentrations ◽  
Insulin Response ◽  
High Dose ◽  
Placebo Condition ◽  
Double Blind ◽  
Physically Active ◽  
Significant Difference ◽  
Arginine Supplementation

l-arginine (2-amino-5-guanidinovaleric acid) is a conditionally essential amino acid. Intravenous (IV) administration of l-arginine invokes a large metabolic (nitrate/nitrite (NOx)) and hormonal (growth hormone (GH), insulin-like growth factor 1 (IGF-1), and insulin) response; however, research examining oral l-arginine supplementation is conflicting, potentially owing to dose. The purpose of this study was examine a low and high dose of oral l-arginine on blood l-arginine, NOx, GH, IGF-1, and insulin response. Fourteen physically active males (age: 25 ± 5 years; weight: 78.0 ± 8.5 kg; height: 179.4 ± 4.7 cm) volunteered to be in a randomized, double-blind, repeated-measures study. Following an overnight fast, an IV catheter was placed in a forearm vein and a resting blood sample was drawn at ∼0800 hours. Each subject was then provided 1 of 3 treatment conditions (placebo, low (0.075 g·kg–1 of body mass), or high (0.15 g·kg–1 of body mass of l-arginine)). Blood samples were drawn at 30, 60, 90, 120, and 180 min after consumption. l-arginine plasma concentrations significantly increased (p < 0.001) to a similar level at any time point in both the low- and high-dose conditions; there was no change over time in the placebo condition. There was no significant difference between conditions for NOx, GH, IGF-1, or insulin. Based on these findings, a low dose of l-arginine was just as effective at increasing plasma l-arginine concentrations as a high dose; however, neither dose was able to promote a significant increase in NOx, GH, IGF-1, or insulin at rest.

Effect of carbohydrate beverage ingestion on central versus peripheral fatigue: a placebo-controlled, randomized trial in cyclists

2019 ◽  
Vol 44 (2) ◽  
pp. 139-147
Author(s):  
Beth W. Glace ◽  
Ian J. Kremenic ◽  
Malachy P. McHugh
Keyword(s):  
Oxygen Consumption ◽  
Repeated Measures ◽  
Femoral Nerve ◽  
Voluntary Contraction ◽  
Peak Oxygen Consumption ◽  
Peripheral Fatigue ◽  
Improve Performance ◽  
Double Blind ◽  
Carbohydrate Ingestion ◽  
Central Activation

We investigated whether carbohydrate ingestion delays fatigue in endurance-trained cyclists via peripheral or central mechanisms. Ten men (35 ± 9 years of age) and 10 women (42 ± 7 years of age) were assigned, in a double-blind, crossover design, to a sports drink (CHO) or to a placebo (PL). The following strength measures were made 3 times (before exercise, after a time trial (TT), and after a ride to exhaustion): (i) maximal voluntary contraction (MVC); (ii) MVC with superimposed femoral nerve magnetic stimulation to measure central activation ratio (CAR); and (iii) femoral nerve stimulation in a 3-s pulse train on relaxed muscle. The subjects cycled for 2 h at approximately 65% of peak oxygen consumption, with five 1-min sprints interspersed, followed by a 3-km TT. After strength testing, the cyclists remounted their bikes, performed a brief warm-up, and pedaled at approximately 85% peak oxygen consumption until unable to maintain workload. Changes in metabolic and strength measurements were analyzed with repeated-measures ANOVA. From before exercise to after the TT, MVC declined in men (17%) and women (18%) (p = 0.004), with no effect of beverage (p > 0.193); CAR decreased in both sexes with PL (p = 0.009), and the decline was attenuated by CHO in men only (time × treatment, p = 0.022); and there was no evidence of peripheral fatigue in either sex with either beverage (p > 0.122). Men rode faster in the TT with CHO (p = 0.005) but did not improve performance in the ride to exhaustion (p = 0.080). In women, CHO did not improve performance in the TT (p = 0.173) or in the ride to exhaustion (p = 0.930). We concluded that carbohydrate ingestion preserved central activation and performance in men, but not in women, during long-duration cycling.

scholarly journals The Dose-Effects of Caffeine on Lower Body Maximal Strength, Muscular Endurance, and Rating of Perceived Exertion in Strength-Trained Females

Nutrients ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 3342
Author(s):  
Louise Jones ◽  
Iona Johnstone ◽  
Charlotte Day ◽  
Sasha Le Marquer ◽  
Andrew T. Hulton
Keyword(s):  
Effect Size ◽  
Repeated Measures ◽  
Perceived Exertion ◽  
Hormonal Contraception ◽  
Rating Of Perceived Exertion ◽  
Muscular Endurance ◽  
Lower Body ◽  
Double Blind ◽  
Strength Performance ◽  
Significant Difference

Caffeine supplementation has shown to be an effective ergogenic aid enhancing athletic performance, although limited research within female populations exists. Therefore, the aim of the investigation was to assess the effect of pre-exercise caffeine supplementation on strength performance and muscular endurance in strength-trained females. In a double-blind, randomised, counterbalanced design, fourteen strength-trained females using hormonal contraception consumed either 3 or 6 mg·kg−1 BM of caffeine or placebo (PLA). Following supplementation, participants performed a one-repetition maximum (1RM) leg press and repetitions to failure (RF) at 60% of their 1RM. During the RF test, rating of perceived exertion (RPE) was recorded every five repetitions and total volume (TV) lifted was calculated. Repeated measures ANOVA revealed that RF (p = 0.010) and TV (p = 0.012) attained significance, with pairwise comparisons indicating a significant difference between 3 mg·kg−1 BM and placebo for RF (p = 0.014), with an effect size of 0.56, and for 6 mg·kg−1 BM (p = 0.036) compared to the placebo, with an effect size of 0.65. No further significance was observed for 1RM or for RPE, and no difference was observed between caffeine trials. Although no impact on lower body muscular strength was observed, doses of 3 and 6 mg·kg−1 BM of caffeine improved lower body muscular endurance in resistance-trained females, which may have a practical application for enhancing resistance training stimuli and improving competitive performance.

Effect of ENDUROX™ on Metabolic Responses to Submaximal Exercise

1999 ◽  
Vol 9 (4) ◽  
pp. 434-442 ◽  
Author(s):  
Samuel N. Cheuvront ◽  
Robert J. Moffatt ◽  
Kyle D. Biggerstaff ◽  
Shawn Bearden ◽  
Paul McDonough
Keyword(s):  
Oxygen Consumption ◽  
Repeated Measures ◽  
Perceived Exertion ◽  
Minute Ventilation ◽  
Rating Of Perceived Exertion ◽  
Peak Oxygen Consumption ◽  
Metabolic Responses ◽  
Double Blind ◽  
Serum Glycerol ◽  
Male Subjects

Claims that ENDUROX™ enhances performance by altering metabolic responses to exercise were tested. In a double-blind crossover design, 10 male subjects were randomly assigned to consume 400 mg of placebo or 800 mg ENDUROX™ for 7 days. Cycle ergometry was performed for 30 minutes at 25%, followed by 10 min at 65% of peak oxygen consumption. After a 1-week washout period, subjects performed the identical exercise protocol following 7 days of reciprocal supplemental conditions. Expired gases were collected and analyzed continuously for oxygen consumption, minute ventilation, and respiratory exchange ratio. Heart rate, blood pressure, rating of perceived exertion, blood lactate, and serum glycerol data were also collected at regular intervals. A two-way ANOVA with repeated measures revealed no significant main or interaction effects involving group differences (p > 0.05) between trials for any variable during rest, 25% or 65% (VO2 peak), or recovery. Our findings do not support the ergogenic claims for ENDUROX™.

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