Acute Responses of Plants to Aerial Pollutants

1973 ◽  
pp. 9-20 ◽  
Author(s):  
O. C. TAYLOR
Keyword(s):  
Acute Responses

scholarly journals Acute and Delayed Effects of Time-Matched Very Short “All Out” Efforts in Concentric vs. Eccentric Cycling

2021 ◽  
Vol 18 (15) ◽  
pp. 7968
Author(s):  
Daniel Boullosa ◽  
Boris Dragutinovic ◽  
Jan-Philip Deutsch ◽  
Steffen Held ◽  
Lars Donath ◽  
...  
Keyword(s):  
Vertical Jump ◽  
Active Recovery ◽  
Thigh Circumference ◽  
Physically Active ◽  
Warm Up ◽  
Delayed Effects ◽  
Acute Responses ◽  
Experimental Protocols ◽  
Different Populations ◽  
Exercise Induced

Background: To the authors’ knowledge, there have been no studies comparing the acute responses to “all out” efforts in concentric (isoinertial) vs. eccentric (isovelocity) cycling. Methods: After two familiarization sessions, 12 physically active men underwent the experimental protocols consisting of a 2-min warm-up and 8 maximal efforts of 5 s, separated by 55 s of active recovery at 80 rpm, in concentric vs. eccentric cycling. Comparisons between protocols were conducted during, immediately after, and 24-h post-sessions. Results: Mechanical (Work: 82,824 ± 6350 vs. 60,602 ± 8904 J) and cardiometabolic responses (mean HR: 68.8 ± 6.6 vs. 51.3 ± 5.7% HRmax, lactate: 4.9 ± 2.1 vs. 1.8 ± 0.6 mmol/L) were larger in concentric cycling (p < 0.001). The perceptual responses to both protocols were similarly low. Immediately after concentric cycling, vertical jump was potentiated (p = 0.028). Muscle soreness (VAS; p = 0.016) and thigh circumference (p = 0.045) were slightly increased only 24-h after eccentric cycling. Serum concentrations of CK, BAG3, and MMP-13 did not change significantly post-exercise. Conclusions: These results suggest the appropriateness of the eccentric cycling protocol used as a time-efficient (i.e., ~60 kJ in 10 min) and safe (i.e., without exercise-induced muscle damage) alternative to be used with different populations in future longitudinal interventions.

scholarly journals Acute Effects of Work Rest Interval Duration of 3 HIIT Protocols on Cycling Power in Trained Young Adults

2021 ◽  
Vol 18 (8) ◽  
pp. 4225
Author(s):  
José Manuel García-De Frutos ◽  
Fco. Javier Orquín-Castrillón ◽  
Pablo Jorge Marcos-Pardo ◽  
Jacobo Á. Rubio-Arias ◽  
Alejandro Martínez-Rodríguez
Keyword(s):  
Density Ratio ◽  
Lactate Concentration ◽  
Interval Training ◽  
Exercise Duration ◽  
Similar Amount ◽  
Rest Interval ◽  
High Intensity Interval Training ◽  
Active Recovery ◽  
Acute Responses ◽  
High Intensity Interval

High-Intensity Interval Training (HIIT) is described as a succession of short duration and maximum or near-maximum intensity efforts, alternated by recovery periods during which exercise continues at a lower intensity (active recovery) or is interrupted (passive recovery). Our objective was to evaluate the acute responses of three HIIT protocols of different work/rest interval times over the total time of the session, with self-selectable load and up to exhaustion, “all out”.The sample was composed of 22 male participants (n = 22) between 19 and 24 years old. The HIIT protocol consisted of one of the three HIIT protocols, of 30, 60 and 90 s density ratio 1:1 and with passive rest, with a total exercise duration of 10 min. The test was performed in a cycloergometer set in workload mode independent of the pedaling frequency. The comparison of the three HIIT protocols shows that the duration of the work/rest intervals, starting from 30 s of work, in the cycloergometer, there are no significant differences in the levels of lactate concentration in the blood, nor in the heart rate, since a similar amount is obtained in the three protocols. The percentage of maximum power developed reached in each HIIT protocol is related to the duration of the working intervals.

Acute responses to barefoot 5 km treadmill running involve changes in landing kinematics and delayed onset muscle soreness

2020 ◽  
Vol 77 ◽  
pp. 231-235
Author(s):  
Camila C. da Silva ◽  
Álvaro S. Machado ◽  
Gislaine R. dos Santos ◽  
Helen L. Schimidt ◽  
Marcos R. Kunzler ◽  
...  
Keyword(s):  
Muscle Soreness ◽  
Delayed Onset Muscle Soreness ◽  
Treadmill Running ◽  
Delayed Onset ◽  
Acute Responses

Chronic intracerebroventricular CRF infusion attenuates ACTH-corticosterone release

1988 ◽  
Vol 255 (2) ◽  
pp. E213-E217 ◽  
Author(s):  
J. J. Cunningham ◽  
P. A. Meara ◽  
R. Y. Lee ◽  
H. H. Bode
Keyword(s):  
Nervous System ◽  
Adrenocorticotropic Hormone ◽  
Feedback Mechanism ◽  
Receptor Desensitization ◽  
Negative Feedback Mechanism ◽  
Corticosterone Secretion ◽  
Acute Responses ◽  
The Central Nervous System ◽  
Corticosterone Release ◽  
Pituitary Adrenal Axis

Bolus intracerebroventricular delivery of corticotropin-releasing factor (CRF) elicits acute responses of both the pituitary-adrenal axis and the sympathetic nervous system. We examined whether these stresslike responses could be maintained over a period of days by central delivery of CRF in nonstressed rats, as would be predicted if this peptide participates in the central nervous system regulation of chronic stress. CRF (4.3 or 21.5 micrograms/day) was continuously delivered into the cerebral ventricle via Alzet minipumps. In contrast to saline-infused controls, rats receiving CRF exhibited elevated excretions of corticosterone, norepinephrine, and urea nitrogen for several days. Thereafter, an attenuation of CRF responsiveness occurred when corticosterone excretion returned to basal levels despite continued central CRF infusion. However, CRF delivered intravenously during attenuation stimulated adrenocorticotropic hormone and corticosterone secretion, implicating a hypothalamic rather than pituitary locus for central CRF resistance. The present data do not permit a conclusion on whether the attenuation of the CRF response with time is the result of an ultrashort-loop negative-feedback mechanism or CRF receptor desensitization.

Relationship between formation of aberrant crypts and acute responses of colonic epithelial cells to genotoxic treatment among inbred rat strains

2003 ◽  
Vol 196 (2) ◽  
pp. 135-141 ◽  
Author(s):  
Satoshi Ishizuka ◽  
Ayumu Takeuchi ◽  
Masahito Hagio ◽  
Mayuko Mohara ◽  
Hiroaki Sakai ◽  
...  
Keyword(s):  
Epithelial Cells ◽  
Rat Strains ◽  
Colonic Epithelial Cells ◽  
Inbred Rat Strains ◽  
Aberrant Crypts ◽  
Acute Responses ◽  
Inbred Rat
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