scholarly journals Exercise shifts hypothetical food choices towards greater amounts and more immediate consumption

2020 ◽  
Author(s):  
Karsten Koehler ◽  
Safiya E Beckford ◽  
Elise Thayer ◽  
Alexandra R Martin ◽  
Julie B Boron ◽  
...  
Keyword(s):  
Food Intake ◽  
Aerobic Exercise ◽  
Acute Exercise ◽  
Food Preferences ◽  
Exercise Bout ◽  
Food Choices ◽  
Post Exercise ◽  
Single Bout ◽  
Electronic Questionnaires ◽  
The Impact

Although exercise modulates appetite regulation and food intake, it remains poorly understood how exercise impacts decision making about food. The purpose of the present study was to assess the impact of an acute exercise bout on hypothetical choices related to the amount and timing of food intake. Forty-one healthy participants (22.0 ± 2.6 years; 23.7 ± 2.5 kg/m2, 56% female) completed 45 minutes of aerobic exercise and a resting control condition in randomized order. Food amount preferences and intertemporal food preferences (preference for immediate vs. delayed consumption) were assessed using electronic questionnaires with visual food. Compared to rest, exercise resulted in a greater increase in the food amount selected, both immediately post exercise (+25.8 ± 11.0 vs. +7.8 ± 11.0 kcal/item, p = 0.02) and 30 min post exercise (+47.3 ± 12.4 vs. +21.3 ± 12.4 kcal/item, p = 0.005). Exercise further resulted in a greater increase in the preference for immediate consumption immediately post exercise (+0.23 ± 0.10 vs. +0.06 ± 0.10; p = 0.03) and 30 min post exercise (+0.30 ± 0.12 vs. +0.08 ± 0.12; p = 0.01). Our findings demonstrate that a single bout of aerobic exercise shifts hypothetical food choices towards greater amounts and more immediate consumption, highlighting the importance of the timing of food choices made in the exercise context.

scholarly journals Exercise Shifts Hypothetical Food Choices toward Greater Amounts and More Immediate Consumption

Nutrients ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 347
Author(s):  
Karsten Koehler ◽  
Safiya E. Beckford ◽  
Elise Thayer ◽  
Alexandra R. Martin ◽  
Julie B. Boron ◽  
...  
Keyword(s):  
Food Intake ◽  
Aerobic Exercise ◽  
Acute Exercise ◽  
Food Preferences ◽  
Exercise Bout ◽  
Food Choices ◽  
Food Cues ◽  
Post Exercise ◽  
Visual Food Cues ◽  
The Impact

Although exercise modulates appetite regulation and food intake, it remains poorly understood how exercise impacts decision-making about food. The purpose of the present study was to assess the impact of an acute exercise bout on hypothetical choices related to the amount and timing of food intake. Forty-one healthy participants (22.0 ± 2.6 years; 23.7 ± 2.5 kg/m2, 56% female) completed 45 min of aerobic exercise and a resting control condition in randomized order. Food amount preferences and intertemporal food preferences (preference for immediate vs. delayed consumption) were assessed using electronic questionnaires with visual food cues. Compared to rest, exercise resulted in a greater increase in the food amount selected, both immediately post-exercise (+25.8 ± 11.0 vs. +7.8 ± 11.0 kcal/item, p = 0.02) and 30 min post-exercise (+47.3 ± 12.4 vs. +21.3 ± 12.4 kcal/item, p = 0.005). Exercise further resulted in a greater increase in the preference for immediate consumption immediately post-exercise (+0.23 ± 0.10 vs. +0.06 ± 0.10; p = 0.03) and 30 min post-exercise (+0.30 ± 0.12 vs. +0.08 ± 0.12; p = 0.01). Our findings demonstrate that a single bout of aerobic exercise shifts hypothetical food choices toward greater amounts and more immediate consumption, highlighting the importance of the timing of food choices made in the exercise context.

scholarly journals Exercise and the Timing of Snack Choice: Healthy Snack Choice is Reduced in the Post-Exercise State

Nutrients ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1941 ◽  
Author(s):  
Christopher Gustafson ◽  
Nigina Rakhmatullaeva ◽  
Safiya Beckford ◽  
Ajai Ammachathram ◽  
Alexander Cristobal ◽  
...  
Keyword(s):  
Food Intake ◽  
Behavioral Intervention ◽  
Food Choice ◽  
Acute Exercise ◽  
Exercise Bout ◽  
Food Choices ◽  
Complete Data ◽  
Post Exercise ◽  
Appetite Suppression ◽  
Exercise Induced

Acute exercise can induce either a compensatory increase in food intake or a reduction in food intake, which results from appetite suppression in the post-exercise state. The timing of food choice—choosing for immediate or later consumption—has been found to influence the healthfulness of foods consumed. To examine both of these effects, we tested in our study whether the timing of food choice interacts with exposure to exercise to impact food choices such that choices would differ when made prior to or following an exercise bout. Visitors to a university recreational center were equipped with an accelerometer prior to their habitual workout regime, masking the true study purpose. As a reward, participants were presented with a snack for consumption after workout completion. Participants made their snack choice from either an apple or chocolate brownie after being pseudo-randomly assigned to choose prior to (“before”) or following workout completion (“after”). Complete data were available for 256 participants (54.7% male, 22.1 ± 3.1 years, 24.7 ± 3.7 kg/m2) who exercised 65.3 ± 22.5 min/session. When compared with “before,” the choice of an apple decreased (73.7% vs. 54.6%) and the choices of brownie (13.9% vs. 20.2%) or no snack (12.4% vs. 25.2%) increased in the “after” condition (χ2 = 26.578, p < 0.001). Our results provide support for both compensatory eating and exercise-induced anorexia. More importantly, our findings suggest that the choice of food for post-exercise consumption can be altered through a simple behavioral intervention.

Effect of a Single Session of Acute Aerobic Exercise on the Activities of High Density Lipoprotein Enzymes

2018 ◽  
Vol 55 (1) ◽  
pp. 18
Author(s):  
Priyanka S. Bannikoppa ◽  
Sheila Uthappa ◽  
Tinku Thomas ◽  
Anura V. Kurpad ◽  
Indu Mani
Keyword(s):  
High Density Lipoprotein ◽  
Aerobic Exercise ◽  
Acute Exercise ◽  
Density Lipoprotein ◽  
High Density ◽  
Paraoxonase 1 ◽  
Matched Pair ◽  
Post Exercise ◽  
Time Points ◽  
Single Bout

High Density Lipoprotein (HDL) is considered to be an anti-atherogenic molecule and its beneficial function is driven by a number of enzymes such as LCAT (Lecithin Cholesterol Acyl Transferase), PON1 (Paraoxonase 1), PAF-AH (Platelet-Activating Factor Acetyl Hydrolase) and CETP (Cholesteryl Ester Transfer Protein). Low HDL-C level is the most prevalent dyslipidemia seen in India and exercise is one reliable way to improve its levels. While acute exercise is known to increase HDL-C levels, not much is known about its effects on HDL functions. This study was aimed at assessing the effect of a single bout of acute aerobic exercise on key HDL functions. Ten healthy adult male volunteers (20-35 years) were made to exercise at 65-80% VO2 max to expend 200 Kcal using a modified Bruce protocol. Plasma samples were collected at different time points (before exercise, 15 min, 1 hour, 2 hours, 4 hours, 24 hours, 48 hours post-exercise) for analysis of HDL anti-inflammatory function and its related enzyme activities. Friedman ANOVA followed by post-hoc Wilcoxon matched pair test, showed that PON1 activity increased immediately but reached significance 48 hours post-exercise (Z = -2.666, p = 0.008). CETP and LCAT activities were decreased significantly at the 4th hour post-exercise and continued to be low even up to 48 hours (Z = -2.666, p = 0.008), whereas HDL-C levels, MPO activity and HDL-II did not vary significantly at different time points. Enhanced activity of the antioxidant enzyme PON1, in combination with decreased activities of pro-atherogenic enzymes CETP and LCAT suggest that even a single bout of acute exercise could be effective in eliciting athero-protective changes in HDL function independent of HDL-C levels.

scholarly journals Single Bout Exercise in Children with Juvenile Idiopathic Arthritis: Impact on Inflammatory Markers

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Rochette Emmanuelle ◽  
Duché Pascale ◽  
Hourdé Christophe ◽  
Evrard Bertrand ◽  
Pereira Bruno ◽  
...  
Keyword(s):  
Juvenile Idiopathic Arthritis ◽  
Inflammatory Markers ◽  
Acute Exercise ◽  
Venous Blood ◽  
Plasma Concentrations ◽  
Exercise Bout ◽  
Fold Increase ◽  
Leg Pain ◽  
Single Bout ◽  
The Impact

Objective. In a context of inflammatory disease such as juvenile idiopathic arthritis (JIA), we do not know what impact physical activity may have on a deregulated immune system. The objective is to measure the impact of a single bout of exercise on plasma inflammatory markers such as calprotectin, IL-6, sIL-6R, sgp130, and the hypothalamic-pituitary-adrenal axis in children with juvenile idiopathic arthritis. Methods. Twelve children with JIA performed a nonexercise control day and a consecutive day that included a 20 min exercise bout at 70% of max-HR at 08:30 am. Venous blood samples were taken at 08:30, 08:50, 09:30, 10:30 am, and 12:00 pm to measure plasma concentrations of calprotectin, IL-6, sIL-6R, sgp130, cortisol, and ACTH. Pain was evaluated at 08:30, 08:50 am, and 06:00 pm. Results. There was a transient twofold increase in postexercise self-evaluated pain (p=0.03) that disappeared in the evening. A single bout of exercise resulted in a 1.7-fold increase in plasma calprotectin (p<0.001) but not IL-6 and its soluble receptors. Calprotectin levels returned to baseline within 3 hours after cessation of exercise. Conclusion. Acute exercise in children with JIA induced slightly musculoskeletal leg pain and transient increased plasma calprotectin levels but not IL-6 levels. Trial registration in ClinicalTrials.gov, reference number NCT 02502539, registered on 29 May 2015.

scholarly journals Appetite, food intake and gut hormone responses to intense aerobic exercise of different duration

2017 ◽  
Vol 235 (3) ◽  
pp. 193-205 ◽  
Author(s):  
Adrian Holliday ◽  
Andrew Blannin
Keyword(s):  
Food Intake ◽  
Aerobic Exercise ◽  
Energy Intake ◽  
High Intensity ◽  
Exercise Bout ◽  
Relative Energy ◽  
Acylated Ghrelin ◽  
Post Exercise ◽  
Time Interaction ◽  
Gut Hormone

The purpose of the study is to investigate the effect of acute bouts of high-intensity aerobic exercise of differing durations on subjective appetite, food intake and appetite-associated hormones in endurance-trained males. Twelve endurance-trained males (age = 21 ± 2 years; BMI = 21.0 ± 1.6 kg/m2; VO2max = 61.6 ± 6.0 mL/kg/min) completed four trials, within a maximum 28 day period, in a counterbalanced order: resting (REST); 15 min exercise bout (15-min); 30 min exercise bout (30-min) and 45 min exercise bout (45-min). All exercise was completed on a cycle ergometer at an intensity of ~76% VO2max. Sixty minutes post exercise, participants consumed an ad libitum meal. Measures of subjective appetite and blood samples were obtained throughout the morning, with plasma analyzed for acylated ghrelin, total polypeptide tyrosine-tyrosine (PYY) and total glucagon-like peptide 1 (GLP-1) concentrations. The following results were obtained: Neither subjective appetite nor absolute food intake differed between trials. Relative energy intake (intake – expenditure) was significantly greater after REST (2641 ± 1616 kJ) compared with both 30-min (1039 ± 1520 kJ) and 45-min (260 ± 1731 kJ), and significantly greater after 15-min (2699 ± 1239 kJ) compared with 45-min (condition main effect, P < 0.001). GLP-1 concentration increased immediately post exercise in 30-min and 45-min, respectively (condition × time interaction, P < 0.001). Acylated ghrelin was transiently suppressed in all exercise trials (condition × time interaction, P = 0.011); the greatest, most enduring suppression, was observed in 45-min. PYY concentration was unchanged with exercise. In conclusion, high-intensity aerobic cycling lasting up to 45 min did not suppress subjective appetite or affect absolute food intake, but did reduce relative energy intake, in well-trained endurance athletes. Findings question the role of appetite hormones in regulating subjective appetite in the acute post-exercise period.

scholarly journals Exercise Shifts Food Choices Towards Greater and More Immediate Food Consumption (OR08-05-19)

2019 ◽  
Vol 3 (Supplement_1) ◽  
Author(s):  
Safiya Beckford ◽  
Elise Thayer ◽  
Sarah Hubner ◽  
Hyeon Jung Kiim ◽  
Alexandra Martin ◽  
...  
Keyword(s):  
Food Consumption ◽  
Visual Cues ◽  
Acute Exercise ◽  
Exercise Bout ◽  
Taste Preference ◽  
Food Choices ◽  
Fat Content ◽  
Experimental Conditions ◽  
Food Items ◽  
The Impact

Abstract Objectives Laboratory experiments suggest that exercise can modulate appetite regulation and ad libitum food intake, but the impact of exercise on decision making about food remains poorly understood. As such, this study sought to assess the impact of an acute exercise bout on food choices, in particular, the amount and taste preference for immediate and delayed consumption. Methods 18 male and 23 female participants (age: 22.0 ± 2.6 years; BMI: 23.7 ± 2.5 kg/m2; VO2peak: 37.3 ± 6.2 mL/kg/min) completed two experimental conditions, a 45-min exercise bout at 60% of VO2peak (EX) and a 45-min resting period (R), in a randomized, cross-over design. Electronic questionnaires to assess prospective food consumption, temporal preference (now vs. delayed consumption), and ratings of appetite and hunger were employed immediately before, immediately after, and 30 min after completion of the EX/R task. Questionnaires provided visual cues of hypothetical food items to assess preferences for different portion sizes as well as binary choices between food items with varying fat content and sweetness. Results There were main condition effects for exercise both immediately (P = 0.02) and 30 min after the task (P = 0.004), demonstrating that EX resulted in increased prospective food consumption for immediate consumption (after task: 41.2 ± 90.7 kcal (EX) vs. 16.0 ± 74.2 kcal (R); 30 min after task: 78.7 ± 107.6 kcal (EX) vs. 46.6 ± 85.2 kcal (R)) and delayed consumption (after task: 10.5 ± 85. 9 kcal (EX) vs. −0.5 ± 73.6 kcal (R); 30 min after task (16.0 ± 88.2 kcal (EX) vs. −4.1 ± 95.2 kcal (R)). Fat content and sweetness did not impact prospective consumption immediately (both P > 0.32) or 30 min after the task (both P > 0.11). Exercise further resulted in an increased preference for immediate vs. delayed consumption both immediately (P = 0.02) and 30 min after the task (P = 0.02). Conclusions Our findings indicate that exercise acutely shifts food choices towards greater amounts and a preference for more immediate food consumption, highlighting the importance of the timing of food choices in the context of exercise. Funding Sources This work was funded by a Food for Health Collaboration Initiative grant by the University of Nebraska.

Time-course of changes in cardiac function during recovery after acute exercise

2007 ◽  
Vol 32 (6) ◽  
pp. 1164-1169 ◽  
Author(s):  
Karen Y. Wonders ◽  
David S. Hydock ◽  
Reid Hayward
Keyword(s):  
Lipid Peroxidation ◽  
Cardiac Function ◽  
Time Course ◽  
Acute Exercise ◽  
Exercise Bout ◽  
Left Ventricular ◽  
Antioxidant Potential ◽  
Exhaustive Exercise ◽  
Post Exercise ◽  
Single Bout

Exercise-induced cardiac dysfunction (EICD) has been observed immediately following exhaustive exercise in trained individuals, but limited and conflicting data are available regarding EICD in a previously untrained population days after an exhaustive exercise bout. The purpose of this study was to examine the effects of a single bout of acute exercise on cardiac function during the 72 h after exercise and identify potential contributing mechanisms. After completing an acute exercise bout on a motorized treadmill (25 m/min, 5% grade, 60 min), rats were sacrificed immediately, 24 h, 48 h, or 72 h after the exercise bout. At the scheduled time of sacrifice, hearts were isolated and perfused for determination of ex vivo cardiac function, and examined for malondialdehyde (MDA), a lipid peroxidation index, and antioxidant potential (AOP). During the 48 h post exercise, left ventricular developed pressure decreased by 30%, dP/dtmax declined by 37%, and dP/dtmin showed a 34% decrease (p < 0.05). By 72 h, cardiac function had returned to control levels. MDA was increased immediately after the exercise bout and at the 24 and 48 h intervals (p < 0.05). Conversely, AOP progressively decreased at the 24 and 48 h intervals. As with cardiac function, MDA and AOP had returned to control levels by 72 h post-exercise. These data indicate that a single bout of prolonged, moderately intense exercise performed by previously sedentary rats impaired cardiac function for up to 48 h. This decrement in cardiac function was associated with increased lipid peroxidation and decreased antioxidant potential.

scholarly journals Effects of Caffeine and Acute Aerobic Exercise on Working Memory and Caffeine Withdrawal

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Anisa Morava ◽  
Matthew James Fagan ◽  
Harry Prapavessis
Keyword(s):  
Working Memory ◽  
Phase I ◽  
Aerobic Exercise ◽  
Acute Exercise ◽  
Withdrawal Symptoms ◽  
Moderate Intensity ◽  
Psychoactive Substances ◽  
Caffeine Withdrawal ◽  
Single Bout ◽  
Cognitive Benefits

AbstractStudies show that a single bout of exercise confers cognitive benefits. However, many individuals use psychoactive substances such as caffeine to enhance cognitive performance. The effects of acute exercise in comparison to caffeine on cognition remain unknown. Furthermore, caffeine use is associated with withdrawal symptoms upon cessation. Whether acute exercise can reduce withdrawal symptoms also remains unknown. The objectives of this study were to compare the effects of acute moderate intensity aerobic exercise to caffeine on working memory (WM) and caffeine withdrawal symptoms (CWS). In Phase I, non-caffeine (n = 29) and caffeine consumers (n = 30) completed a WM assessment, followed by acute exercise and caffeine. In Phase II, caffeine consumers (n = 25) from Phase I underwent the WM assessment and reported CWS following a 12-hour deprivation period. Acute moderate intensity aerobic exercise and caffeine (1.2 mg/kg) significantly improved WM accuracy and reduced CWS comparably. WM performance was not reduced following caffeine deprivation.

Effect of a single bout of exercise and chronic exercise training on insulin sensitivity in racing sled dogs

2014 ◽  
Vol 10 (3) ◽  
pp. 167-172 ◽  
Author(s):  
S.E. Pratt-Phillips ◽  
R.J. Geor ◽  
M. Buser ◽  
A. Zirkle ◽  
A. Moore ◽  
...  
Keyword(s):  
Insulin Sensitivity ◽  
Exercise Training ◽  
Exercise Bout ◽  
Post Exercise ◽  
Exercise Challenge ◽  
Sled Dogs ◽  
Significant Difference ◽  
Single Bout ◽  
Three Stages

Two experiments were designed to investigate the role of exercise on insulin sensitivity (IS) in Alaskan racing sled dogs. In both experiments, IS was quantified with an isoglycemic-hyperinsulinemic clamp (IHC), whereby IS was defined as the glucose infusion rate (GIR) divided by the mean insulin concentration during the clamp. In Experiment 1, IS was quantified in 12 racing sled dogs during three stages of exercise training: unexercised for 4 months over the summer (deconditioned), and after two and four months of exercise conditioning. At each stage IS was assessed in unexercised dogs (n=6) and 60 h following a standard exercise challenge (n=6) consisting of a 35.4 km run completed in 2.5 h. In Experiment 2, IS was assessed in deconditioned dogs (n=6) and in well-conditioned dogs that had either completed a 708 km race 5-days prior (n=3) or were unraced for the previous month (n=3). In Experiment 1, there were no significant differences (Pã0.05) in GIR or IS between the three levels of conditioning, nor were there any effects of the exercise bout 60 h prior to the IHC. In Experiment 2 there was no significant difference in IS between well-conditioned dogs and untrained dogs (Pã0.05). However, dogs that completed a 708 km race 5-days prior to the IHC had a significantly higher IS than dogs that were deconditioned and those that were conditioned but unraced. These results suggest that the workload of an exercise challenge is a factor in post-exercise changes in IS but that exercise conditioning has little impact on IS in Alaskan sled dogs.

scholarly journals Resistance training reduces the acute exercise-induced increase in muscle protein turnover

1999 ◽  
Vol 276 (1) ◽  
pp. E118-E124 ◽  
Author(s):  
S. M. Phillips ◽  
K. D. Tipton ◽  
A. A. Ferrando ◽  
R. R. Wolfe
Keyword(s):  
Resistance Training ◽  
Resistance Exercise ◽  
Acute Exercise ◽  
Muscle Protein ◽  
Exercise Bout ◽  
Muscle Contractions ◽  
Breakdown Rates ◽  
Single Bout ◽  
Fractional Synthesis ◽  
Exercise Induced

We examined the effect of resistance training on the response of mixed muscle protein fractional synthesis (FSR) and breakdown rates (FBR) by use of primed constant infusions of [2H5]phenylalanine and [15N]phenylalanine, respectively, to an isolated bout of pleiometric resistance exercise. Trained subjects, who were performing regular resistance exercise (trained, T; n = 6), were compared with sedentary, untrained controls (untrained, UT; n = 6). The exercise test consisted of 10 sets (8 repetitions per set) of single-leg knee flexion (i.e., pleiometric muscle contraction during lowering) at 120% of the subjects’ predetermined single-leg 1 repetition maximum. Subjects exercised one leg while their contralateral leg acted as a nonexercised (resting) control. Exercise resulted in an increase, above resting, in mixed muscle FSR in both groups (UT: rest, 0.036 ± 0.002; exercise, 0.0802 ± 0.01; T: rest, 0.045 ± 0.004; exercise, 0.067 ± 0.01; all values in %/h; P< 0.01). In addition, exercise resulted in an increase in mixed muscle FBR of 37 ± 5% (rest, 0.076 ± 0.005; exercise, 0.105 ± 0.01; all values in %/h; P < 0.01) in the UT group but did not significantly affect FBR in the T group. The resulting muscle net balance (FSR − FBR) was negative throughout the protocol ( P < 0.05) but was increased in the exercised leg in both groups ( P < 0.05). We conclude that pleiometric muscle contractions induce an increase in mixed muscle protein synthetic rate within 4 h of completion of an exercise bout but that resistance training attenuates this increase. A single bout of pleiometric muscle contractions also increased the FBR of mixed muscle protein in UT but not in T subjects.

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