The effect of interval versus continuous exercise on plasma leptin and ghrelin concentration in young trotters

2011 ◽  
Vol 14 (3) ◽  
pp. 373-378 ◽  
Author(s):  
S. Kowalik ◽  
W. Kędzierski
Keyword(s):  
Lactic Acid Concentration ◽  
Experimental Conditions ◽  
Ghrelin Concentration ◽  
Interval Exercise ◽  
Continuous Exercise ◽  
Type Of Exercise ◽  
Exercise Induced ◽  
Interval Type ◽  
Plasma Leptin ◽  
Plasma Ghrelin Concentration

The effect of interval versus continuous exercise on plasma leptin and ghrelin concentration in young trottersThe effect of interval vs. continuous exercise on plasma leptin and ghrelin concentration in young Standardbred horses was studied. The experiment was conducted on 27 trotters, in the age between 2 and 3 years. They were divided into two groups according to the type of exercise. Blood samples were collected through jugular venipuncture in the following experimental conditions: at rest, immediately after exercise and 30 minutes after the end of the effort. Plasma leptin and ghrelin concentrations were determined using RIA tests. The continuous exercise induced an increase in plasma leptin concentration whereas the interval type of exercise did not influence the level of this hormone (3.47 ± 0.78 vs. 4.07 ± 0.94 and 2.31 ± 0.15 vs. 2.36 ± 0.21 ng/mL, respectively). The plasma ghrelin concentration measured after the continuous exercise, significantly increased (720 ± 27.4 vs. 814 ± 13.8; p ≤ 0.05) whereas concentration of this hormone assessed after the interval exercise, significantly dropped (982 ± 56.5 vs. 842 ± 35.6 pg/mL; p ≤ 0.05). The changes in plasma ghrelin concentration measured after the end of the effort correlated inversely with blood lactic acid concentration. In conclusion, the obtained results showed that medium-intensive type of exercise, such as trot, interval or continuous, slightly affected plasma leptin level but significantly affected plasma ghrelin concentration in young Standardbred trotters.

Subjective Responses to Interval and Continuous Exercise in Adults With Exercise-Induced Bronchoconstriction

2017 ◽  
Vol 14 (6) ◽  
pp. 486-491 ◽  
Author(s):  
Carley O’Neill ◽  
Shilpa Dogra
Keyword(s):  
Physical Activity ◽  
Perceived Exertion ◽  
Moderate Intensity ◽  
Activity Levels ◽  
Ratings Of Perceived Exertion ◽  
Interval Exercise ◽  
Continuous Exercise ◽  
High Intensity Interval ◽  
Exercise Induced ◽  
Activity Enjoyment

Background:Exercise triggers asthma symptoms among adults with exercise induced bronchoconstriction (EIBC). This may lead to lower physical activity levels among this population. The purpose of this study was to assess perceived exertion (RPE), perceived breathlessness (RPD), affect (FS), and physical activity enjoyment during and following an acute bout of high intensity interval exercise (HIIE), moderate intensity interval (MIIE) and moderate intensity continuous exercise (MICE) in adults with EIBC.Methods:RPD, RPE, and FS were assessed each minute during the sessions and enjoyment was assessed following each session (n = 11).Results:RPE was lower during MIIE compared with MICE (P = .006). RPD was lowest during MIIE but was not different between HIIE and MICE. Affect was lower in MICE than HIIE in the last minute of exercise (P = .003) and overall was greatest during the MIIE (P = .022; P = .018). Enjoyment scores were similar between protocols.Conclusions:Interval exercise is associated with lower ratings of perceived exertion and dyspnea, an increase in in-task affect, and similar physical activity enjoyment when compared with continuous exercise.

scholarly journals Cerebral Hemodynamic and Neurotrophic Factor Responses Are Dependent on the Type of Exercise

2021 ◽  
Vol 11 ◽  
Author(s):  
Samuel R. Weaver ◽  
Bethany D. Skinner ◽  
Rhodri Furlong ◽  
Rebekah A. I. Lucas ◽  
N. Timothy Cable ◽  
...  
Keyword(s):  
Growth Factor ◽  
Neurotrophic Factor ◽  
Moderate Intensity ◽  
Active Recovery ◽  
Cerebral Hemodynamic ◽  
Interval Exercise ◽  
Continuous Exercise ◽  
High Intensity Interval ◽  
Type Of Exercise ◽  
Endothelial Growth Factor

This study examined acute cerebral hemodynamic and circulating neurotrophic factor responses to moderate intensity continuous exercise (MICT), guideline-based high intensity interval exercise (HIIT), and sprint interval exercise (SIT). We hypothesized that the pattern of middle cerebral artery velocity (MCAv) response would differ between interval and continuous exercise, with SIT inducing the smallest increase from rest, while increases in neurotrophic factors would be intensity-dependent. In a randomized crossover design, 24 healthy adults (nine females) performed three exercise protocols: (i) MICT (30 min), (ii) HIIT (4 × 4 min at 85% HRmax), and (iii) SIT (4 × 30 s supramaximal). MCAv significantly increased from rest across MICT (Δ13.1 ± 8.5 cm⋅s–1, p < 0.001) and all bouts of HIIT (Δ15.2 ± 9.8 cm⋅s–1, p < 0.001), but only for the initial bout of SIT (Δ17.3 ± 11.6 cm⋅s–1, p < 0.001). Immediately following each interval bout, MCAv increased (i.e., rebounded) for the SIT (9–14% above rest, p ≤ 0.04), but not HIIT protocol. SIT alone induced significant elevations from rest to end-exercise in vascular endothelial growth factor (VEGF; Δ28 ± 36%, p = 0.017) and brain-derived neurotrophic factor (BDNF, Δ149% ± 162%, p < 0.001) and there were greater increases in lactate than in either other protocol (>5-fold greater in SIT, p < 0.001), alongside a small significant reduction at the end of active recovery in insulin-like growth factor 1 (IGF-1, Δ22 ± 21%, p = 0.002). In conclusion, while the nature of the response may differ, both guideline-based and sprint-based interval exercise have the potential to induce significant changes in factors linked to improved cerebrovascular and brain health.

Acute effect of high-intensity interval exercise and moderate-intensity continuous exercise on appetite in overweight/obese males: a pilot study

2017 ◽  
Vol 13 (2) ◽  
pp. 403-410 ◽  
Author(s):  
Victor Araújo Ferreira Matos ◽  
Daniel Costa de Souza ◽  
Rodrigo Alberto Vieira Browne ◽  
Victor Oliveira Albuquerque dos Santos ◽  
Eduardo Caldas Costa ◽  
...  
Keyword(s):  
Pilot Study ◽  
High Intensity ◽  
Acute Effect ◽  
Moderate Intensity ◽  
Interval Exercise ◽  
Continuous Exercise ◽  
High Intensity Interval

Effects of a single session of high-intensity interval exercise and moderate-intensity continuous exercise on biochemical cardiovascular risk factors in obese males

2018 ◽  
Vol 14 (2) ◽  
pp. 323-330 ◽  
Author(s):  
Ana Paula Trussardi Fayh ◽  
Victor Araújo Ferreira Matos ◽  
Daniel Costa de Souza ◽  
Victor Oliveira Albuquerque dos Santos ◽  
Cristiane da Silva Ramos Marinho ◽  
...  
Keyword(s):  
Risk Factors ◽  
Cardiovascular Risk ◽  
Cardiovascular Risk Factors ◽  
High Intensity ◽  
Moderate Intensity ◽  
Single Session ◽  
Interval Exercise ◽  
Continuous Exercise ◽  
High Intensity Interval

Attenuation of exertional desaturation and preference for interval exercise compared to continuous exercise in people with interstitial lung disease

Respirology ◽  
2021 ◽  
Author(s):  
Leona M. Dowman ◽  
Anthony K. May ◽  
Narelle S. Cox ◽  
Norman R. Morris ◽  
Atsuhito Nakazawa ◽  
...  
Keyword(s):  
Interstitial Lung Disease ◽  
Lung Disease ◽  
Interval Exercise ◽  
Continuous Exercise

Determining the Optimal Interval Exercise Intensity Dose for Improving Exercise Performance

2016 ◽  
Author(s):  
Norah MacMillan
Keyword(s):  
Interval Training ◽  
Active Recovery ◽  
Performance Variables ◽  
Interval Exercise ◽  
Optimal Interval ◽  
Positive Effects ◽  
Long Duration ◽  
Before And After ◽  
And Performance ◽  
Type Of Exercise

Short duration interval training is a time-efficient exercise strategy that can improve fitness through changes in metabolic, cardiovascular and performance related variables. Studies have examined the positive effects of maximal intensity exercise (≥100% VO2max) on metabolic and performance variables in recreationally active individuals and trained athletes. The intensity of interval training required to cause improvements in aerobic fitness is unknown. This study will look at the performance related adaptations that occur with three different exercise intensities of interval training matched in terms of duration, frequency and type of exercise. Sixteen recreationally active individuals, both males (n=9, age = 23.3±3.3, VO2max = 44.2±6.5) and females (n=6, age = 21.5±0.7, VO2max = 39.7±5.4) were randomly assigned to one of three groups who trained using intervals at 120% VO2max (n=5), 90% VO2max (n=4) or 65% VO2max (n=7). The participants performed 14 days of training spread over 4 weeks that consisted of 8-12 repeats of 1-minute cycling at the prescribed intensity with 1-minute active recovery between intervals. Training increased time to fatigue in the 90% VO2max and 120% VO2max group however not in the 65% VO2max group. The changes in VO2max before and after training were significant in the 90% VO2max group and the 120% VO2max group, however not between the 120% VO2max and 90% VO2max group (p≤0.05). Interval training at 90% and 120% VO2max stimulates analogous improvements in fitness. These results may be important for diseased or sedentary populations where very high-intensity and long duration exercise may not be well tolerated.

High-intensity interval exercise promotes post-exercise hypotension of greater magnitude compared to moderate-intensity continuous exercise

2019 ◽  
Vol 119 (5) ◽  
pp. 1235-1243 ◽  
Author(s):  
Flávia C. Pimenta ◽  
Fábio Tanil Montrezol ◽  
Victor Zuniga Dourado ◽  
Luís Fernando Marcelino da Silva ◽  
Gabriela Alves Borba ◽  
...  
Keyword(s):  
High Intensity ◽  
Moderate Intensity ◽  
Post Exercise ◽  
Interval Exercise ◽  
Continuous Exercise ◽  
High Intensity Interval ◽  
Post Exercise Hypotension

scholarly journals High-intensity interval exercise induces greater acute changes in sleep, appetite-related hormones, and free-living energy intake than does moderate-intensity continuous exercise

2019 ◽  
Vol 44 (5) ◽  
pp. 557-566 ◽  
Author(s):  
Penelope Larsen ◽  
Frank Marino ◽  
Kerri Melehan ◽  
Kym J. Guelfi ◽  
Rob Duffield ◽  
...  
Keyword(s):  
Oxygen Consumption ◽  
Energy Intake ◽  
High Intensity ◽  
Peak Oxygen Consumption ◽  
Moderate Intensity ◽  
Sleep Stages ◽  
Acylated Ghrelin ◽  
Interval Exercise ◽  
Continuous Exercise ◽  
High Intensity Interval

The aim of this study was to compare the effect of high-intensity interval exercise (HIIE) and moderate-intensity continuous exercise (MICE) on sleep characteristics, appetite-related hormones, and eating behaviour. Eleven overweight, inactive men completed 2 consecutive nights of sleep assessments to determine baseline (BASE) sleep stages and arousals recorded by polysomnography (PSG). On separate afternoons (1400–1600 h), participants completed a 30-min exercise bout: either (i) MICE (60% peak oxygen consumption) or (ii) HIIE (60 s of work at 100% peak oxygen consumption: 240 s of rest at 50% peak oxygen consumption), in a randomised order. Measures included appetite-related hormones (acylated ghrelin, leptin, and peptide tyrosine tyrosine) and glucose before exercise, 30 min after exercise, and the next morning after exercise; PSG sleep stages; and actigraphy (sleep quantity and quality); in addition, self-reported sleep and food diaries were recorded until 48 h after exercise. There were no between-trial differences for time in bed (p = 0.19) or total sleep time (p = 0.99). After HIIE, stage N3 sleep was greater (21% ± 7%) compared with BASE (18% ± 7%; p = 0.02). In addition, the number of arousals during rapid eye movement sleep were lower after HIIE (7 ± 5) compared with BASE (11 ± 7; p = 0.05). Wake after sleep onset was lower following MICE (41 min) compared with BASE (56 min; p = 0.02). Acylated ghrelin was lower and glucose was higher at 30 min after HIIE when compared with MICE (p ≤ 0.05). There were no significant differences between conditions in terms of total energy intake (p ≥ 0.05). HIIE appears to be more beneficial than MICE for improving sleep quality and inducing favourable transient changes in appetite-related hormones in overweight, inactive men. However, energy intake was not altered regardless of exercise intensity.

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