Relaxation as Principal Treatment for Excessive Cigarette Use and Caffeine Ingestion by a College Female

1979 ◽  
Vol 45 (2) ◽  
pp. 531-534 ◽  
Author(s):  
Gerald C. Hyner

A female graduate student with diagnosed tachycardia was the subject in an experiment to reduce consumption of caffeine and use of cigarettes. The relaxation procedure described by Benson was used as the principal treatment. Reinforcement cards for nonsmoking and elimination of caffeine were also used. The subject was successful in reducing her caffeine intake and completely extinguished use of cigarettes. She reported that she was still practicing the relaxation procedure 1 yr. later. Apparently these procedures can be helpful in modifying use of cigarettes and caffeine.

1979 ◽  
Vol 45 (3) ◽  
pp. 955-962 ◽  
Author(s):  
Yutaka Haruki ◽  
Hideko Ito ◽  
Yoshitaka Oue ◽  
Kaneo Nedate

The hypothesis tested was that the type of reinforcement (with regard to the administrator and the recipient) is responsible for differentiating the efficiency of learning in humans. The first type, termed external reinforcement, is one in which the experimenter controls and the subject receives the reinforcement. The second type is self-reinforcement, i.e., the subject controls and receives the reinforcement. The third type ( internal reinforcement) reverses the subject-experimenter relationship employed in the first type. The fourth type ( alien reinforcement) occurs when the experimenter replaces the subject's role played in the second type. In Exp. I, 30 male undergraduates learned to choose as correct a nonsense syllable among four such syllables on each test card. A male graduate student served as the experimenter. Results indicated that the subjects can learn the task under the conditions of the fourth type of reinforcement as well as the first type. The fourth type was superior in its effect on learning. In Exp. II, 19 male undergraduates learned to choose one of the four meaningful words, and a female graduate student served as experimenter. Neither the second nor the third type was effective. It was concluded that the type of reinforcement in which the experimenter is reinforced by himself seems most effective in facilitating learning, due probably to some motivational factor.


1985 ◽  
Vol 5 (3) ◽  
pp. 69-80
Author(s):  
Juanita L. Garcia ◽  
Jordan I Kosberg

Author(s):  
Arthur W. Burks

This is the story of how, in 1957, John Holland, a graduate student in mathematics; Gordon Peterson, a professor of speech; the present writer, a professor of philosophy; and several other Michigan faculty started a graduate program in Computers and Communications—with John our first Ph.D. and, I believe, the world's first doctorate in this now-burgeoning field. This program was to become the Department of Computer and Communication Sciences in the College of Literature, Science, and the Arts about ten years later. It had arisen also from a research group at Michigan on logic and computers that I had established in 1949 at the request of the Burroughs Adding Machine Company. When I first met John in 1956, he was a graduate of MIT in electrical engineering, and one of the few people in the world who had worked with the relatively new electronic computers. He had used the Whirlwind I computer at MIT [33], which was a process-control variant of the Institute for Advanced Study (IAS) Computer [27]. He had also studied the 1946 Moore School Lectures on the design of electronic computers, edited by George Patterson [58]. He had then gone to IBM and helped program its first electronic computer, the IBM 701, the first commercial version of the IAS Computer. While a graduate student in mathematics at Michigan, John was also doing military work at the Willow Run Research Laboratories to support himself. And 1 had been invited to the Laboratories by a former student of mine, Dr. Jesse Wright, to consult with a small research group of which John was a member. It was this meeting that led to the University's graduate program and then the College's full-fledged department. The Logic of Computers Group, out of which this program arose, in part, then continued with John as co-director, though each of us did his own research. This anomaly of a teacher of philosophy meeting an accomplished electrical engineer in the new and very small field of electronic computers needs some explanation, one to be found in the story of the invention of the programmable electronic computer. For the first three programmable electronic computers (the manually programmed ENIAC and the automatically programmed EDVAC and Institute for Advanced Study Computer) and their successors constituted both the instrumentation and the subject matter of our new Graduate Program in Computers and Communications.


Nutrients ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 732 ◽  
Author(s):  
Juan Del Coso ◽  
Beatriz Lara ◽  
Carlos Ruiz-Moreno ◽  
Juan Salinero

The ergogenicity of caffeine on several exercise and sport situations is well-established. However, the extent of the ergogenic response to acute caffeine ingestion might greatly vary among individuals despite using the same dosage and timing. The existence of one or several individuals that obtained minimal ergogenic effects or even slightly ergolytic effects after caffeine intake (i.e., non-responders) has been reported in several previous investigations. Nevertheless, the concept non-responding to caffeine, in terms of physical performance, relies on investigations based on the measurement of one performance variable obtained once. Recently it has been suggested that correct identification of the individual ergogenic effect induced by caffeine intake requires the repeated measurement of physical performance in identical caffeine–placebo comparisons. In this communication, we present data from an investigation where the ergogenic effect of acute caffeine intake (3 mg/kg) was measured eight times over a placebo in the same individuals and under the same conditions by an incremental cycling test to volitional fatigue and an adapted version of the Wingate cycling test. The ergogenic response to caffeine varied from 9% to 1% among individuals, but all participants increased both cycling power in the incremental test and Wingate mean power at least three to eight times out of eight the caffeine–placebo comparisons. These data expand the suggestion of a minimal occurrence of caffeine non-responders because it shows that all individuals responded to caffeine when caffeine is compared to a placebo on multiple and repeated testing sessions.


2020 ◽  
Vol 30 (5) ◽  
pp. 362-373
Author(s):  
Alex M. Ehlert ◽  
Hannah M. Twiddy ◽  
Patrick B. Wilson

Caffeine ingestion can improve performance across a variety of exercise modalities but can also elicit negative side effects in some individuals. Thus, there is a growing interest in the use of caffeine mouth rinse solutions to improve sport and exercise performance while minimizing caffeine’s potentially adverse effects. Mouth rinse protocols involve swilling a solution within the oral cavity for a short time (e.g., 5–10 s) before expectorating it to avoid systemic absorption. This is believed to improve performance via activation of taste receptors and stimulation of the central nervous system. Although reviews of the literature indicate that carbohydrate mouth rinsing can improve exercise performance in some situations, there has been no attempt to systematically review the available literature on caffeine mouth rinsing and its effects on exercise performance. To fill this gap, a systematic literature search of three databases (PubMed, SPORTDiscus, and Web of Science) was conducted by two independent reviewers. The search resulted in 11 randomized crossover studies that were appraised and reviewed. Three studies found significant positive effects of caffeine mouth rinsing on exercise performance, whereas the remaining eight found no improvements or only suggestive benefits. The mixed results may be due to heterogeneity in the methods across studies, interindividual differences in bitter tasting, and differences in the concentrations of caffeine solutions. Future studies should evaluate how manipulating the concentration of caffeine solutions, habitual caffeine intake, and genetic modifiers of bitter taste influence the efficacy of caffeine mouth rinsing as an ergogenic strategy.


2013 ◽  
Vol 25 (1) ◽  
pp. 37-55 ◽  
Author(s):  
Clare Marie Mehta ◽  
Emily Keener ◽  
Lydia Shrier

1992 ◽  
Vol 2 (4) ◽  
pp. 386-396 ◽  
Author(s):  
Herman-J. Engels ◽  
Emily M. Haymes

This study examined the effects of a single dose of caffeine (5 mg:kg−1) on energy metabolism during 60-min treadmill walking at light (30%) and moderate (50%) aerobic intensities in eight sedentary (39.6 ±t3.1 ml.kg−1.min−1) males. Caffeine intake 60 min prior to walking exercise increased pre- and postexercise FFA, glycerol, and lactate concentrations (p< 0.05). Blood glucose levels following walking trials were lower than preexercise values (p< 0.05). Gas exchange indicated that caffeine did not change exercise oxygen uptake, RER values, and carbon dioxide production (p0.05). In contrast, a small but statistically significant effect of caffeine on exercise minute ventilation was noted (p~0.01). It is concluded that ingestion of 5 mg.kg−1caffeine increases the mobilization of energy substrate from fat sources; however, the present data do not provide evidence of a caffeineinduced shift in energy substrate usage. Caffeine is not an effective means for enhancing the energy cost of prolonged walking.


2014 ◽  
Vol 117 (12) ◽  
pp. 1514-1523 ◽  
Author(s):  
Helma M. de Morree ◽  
Christoph Klein ◽  
Samuele M. Marcora

Caffeine intake results in a decrease in perception of effort, but the cortical substrates of this perceptual effect of caffeine are unknown. The aim of this randomized counterbalanced double-blind crossover study was to investigate the effect of caffeine on the motor-related cortical potential (MRCP) and its relationship with rating of perceived effort (RPE). We also investigated whether MRCP is associated with the increase in RPE occurring over time during submaximal exercise. Twelve healthy female volunteers performed 100 intermittent isometric knee extensions at 61 ± 5% of their maximal torque 1.5 h after either caffeine (6 mg/kg) or placebo ingestion, while RPE, vastus lateralis electromyogram (EMG), and MRCP were recorded. RPE and MRCP amplitude at the vertex during the first contraction epoch (0–1 s) were significantly lower after caffeine ingestion compared with placebo ( P < 0.05) and were significantly higher during the second half of the submaximal intermittent isometric knee-extension protocol compared with the first half ( P < 0.05). No significant effects of caffeine and time-on-task were found for EMG amplitude and submaximal force output variables. The covariation between MRCP and RPE across both caffeine and time-on-task ( r10 = −0.335, P < 0.05) provides evidence in favor of the theory that perception of effort arises from neurocognitive processing of corollary discharges from premotor and motor areas of the cortex. Caffeine seems to reduce perception of effort through a reduction in the activity of cortical premotor and motor areas necessary to produce a submaximal force, and time-on-task has the opposite effect.


2005 ◽  
Vol 14 (4) ◽  
pp. 294-300 ◽  
Author(s):  
João C. Dias ◽  
Melissa W. Roti ◽  
Amy C. Pumerantz ◽  
Greig Watson ◽  
Daniel A. Judelson ◽  
...  

Context:Dieticians, physiologists, athletic trainers, and physicians have recommended refraining from caffeine intake when exercising because of possible fluid-electrolyte imbalances and dehydration.Objective:To assess how 16-hour rehydration is affected by caffeine ingestion.Design:Dose–response.Setting:Environmental chamber.Participants:59 college-age men.Intervention:Subjects consumed a chronic caffeine dose of 0 (placebo), 3, or 6 mg · kg−1· day−1and performed an exercise heat-tolerance test (EHT) consisting of 90 minutes of walking on a treadmill (5.6 km/h) in the heat (37.7 °C).Outcome Measures:Fluid-electrolyte measures.Results:There were no between-group differences immediately after and 16 hours after EHT in total plasma protein, hematocrit, urine osmolality, specific gravity, color, and volume. Body weights after EHT and the following day (16 hours) were not different between groups (P> .05).Conclusion:Hydration status 16 hours after EHT did not change with chronic caffeine ingestion.


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