Influence of exercise intensity and regional differences in the sudomotor recruitment pattern in exercising prepubertal boys and young men

2021 ◽  
pp. 113642
Author(s):  
Tatsuro Amano ◽  
Takako Asami ◽  
Tomoko Ichinose-Kuwahara ◽  
Dai Okushima ◽  
Hiroyuki Ueda ◽  
...  
Keyword(s):  
Exercise Intensity ◽  
Regional Differences ◽  
Young Men ◽  
Recruitment Pattern ◽  
Prepubertal Boys

Endurance training increases fatty acid turnover, but not fat oxidation, in young men

1999 ◽  
Vol 86 (6) ◽  
pp. 2097-2105 ◽  
Author(s):  
Anne L. Friedlander ◽  
Gretchen A. Casazza ◽  
Michael A. Horning ◽  
Anton Usaj ◽  
George A. Brooks
Keyword(s):  
Fatty Acid ◽  
Endurance Training ◽  
Exercise Intensity ◽  
Young Men ◽  
Plasma Free Fatty Acid ◽  
Fat Oxidation ◽  
Peak Oxygen Consumption ◽  
Whole Body ◽  
Plasma Ffa ◽  
Total Fat

We examined the effects of exercise intensity and a 10-wk cycle ergometer training program [5 days/wk, 1 h, 75% peak oxygen consumption (V˙o 2 peak)] on plasma free fatty acid (FFA) flux, total fat oxidation, and whole body lipolysis in healthy male subjects ( n= 10; age = 25.6 ± 1.0 yr). Two pretraining trials (45 and 65% ofV˙o 2 peak) and two posttraining trials (same absolute workload, 65% of oldV˙o 2 peak; and same relative workload, 65% of newV˙o 2 peak) were performed by using an infusion of [1-13C]palmitate and [1,1,2,3,3-2H]glycerol. An additional nine subjects (age 25.4 ± 0.8 yr) were treated similarly but were infused with [1,1,2,3,3-2H]glycerol and not [1-13C]palmitate. Subjects were studied postabsorptive for 90 min of rest and 1 h of cycling exercise. After training, subjects increasedV˙o 2 peak by 9.4 ± 1.4%. Pretraining, plasma FFA kinetics were inversely related to exercise intensity with rates of appearance (Ra) and disappearance (Rd) being significantly higher at 45 than at 65%V˙o 2 peak(Ra: 8.14 ± 1.28 vs. 6.64 ± 0.46, Rd: 8.03 ± 1.28 vs. 6.42 ± 0.41 mol ⋅ kg−1 ⋅ min−1) ( P ≤ 0.05). After training, when measured at the same absolute and relative intensities, FFA Ra increased to 8.84 ± 1.1, 8.44 ± 1.1 and Rd to 8.82 ± 1.1, 8.35 ± 1.1 mol ⋅ kg−1 ⋅ min−1, respectively ( P ≤ 0.05). Total fat oxidation determined from respiratory exchange ratio was elevated during exercise compared with rest, but did not differ among the four conditions. Glycerol Ra was elevated during exercise compared with rest but did not demonstrate significant intensity or training effects during exercise. Thus, in young men, plasma FFA flux is increased during exercise after endurance training, but total fat oxidation and whole-body lipolysis are unaffected when measured at the same absolute or relative exercise intensities.

RELATIONSHIPS BETWEEN SWEATING RATE AND SKIN BLOOD FLOW IN PREPUBERTAL BOYS AND YOUNG MEN 780

1997 ◽  
Vol 29 (Supplement) ◽  
pp. 135
Author(s):  
Y. Inoue ◽  
M. Shibasaki ◽  
N. Kondo ◽  
K. Hirata ◽  
H. Ueda
Keyword(s):  
Blood Flow ◽  
Skin Blood Flow ◽  
Young Men ◽  
Sweating Rate ◽  
Prepubertal Boys

Acute effects of exercise intensity on appetite in young men

1988 ◽  
Vol 20 (3) ◽  
pp. 222-227 ◽  
Author(s):  
DEBORAH A. THOMPSON ◽  
LARRY A. WOLFE ◽  
ROELOF EIKELBOOM
Keyword(s):  
Exercise Intensity ◽  
Young Men ◽  
Acute Effects

Regional differences in peripheral vasoconstriction of prepubertal boys

2005 ◽  
Vol 96 (4) ◽  
pp. 397-403 ◽  
Author(s):  
Yoshimitsu Inoue ◽  
Syunichi Nakamura ◽  
Kiichi Yonehiro ◽  
Tomoko Kuwahara ◽  
Hiroyuki Ueda ◽  
...  
Keyword(s):  
Regional Differences ◽  
Peripheral Vasoconstriction ◽  
Prepubertal Boys

Facial Blood Flow Responses to Dynamic Exercise

2020 ◽  
Author(s):  
Naoyuki Hayashi ◽  
Hideaki Kashima ◽  
Tsukasa Ikemura
Keyword(s):  
Blood Flow ◽  
Exercise Intensity ◽  
Regional Differences ◽  
Regional Blood Flow ◽  
Dynamic Exercise ◽  
Laser Speckle ◽  
Laser Speckle Flowgraphy ◽  
Handgrip Exercise ◽  
Post Hoc ◽  
One Way Anova

AbstractWe reported previously that a static handgrip exercise evoked regional differences in the facial blood flow. The present study examined whether regional differences in facial blood flow are also evoked during dynamic exercise. Facial blood flow was measured by laser speckle flowgraphy during 15 min of cycling exercise at heart rates of 120 bpm, 140 bpm and 160 bpm in 12 subjects. The facial vascular conductance index was calculated from the blood flow and mean arterial pressure. The regional blood flow and conductance index values were determined in the forehead, eyelid, nose, cheek, ear and lip. One-way ANOVA and Tukey’s post-hoc test were used to examine effects of exercise intensity and target regions. The blood flow and conductance index in skin areas increased significantly with the exercise intensity. The blood flow and conductance index in the lip increased significantly at 120 bpm and 140 bpm compared to the control, while the values in the lip at 160 bpm did not change from the control values. These results suggest that the blood flow in facial skin areas, not in the lip, responds similarly to dynamic exercise, in contrast to the responses to static exercise.

scholarly journals Altitude Cardiomyopathy Is Associated With Impaired Stress Electrocardiogram and Increased Circulating Inflammation Makers

2021 ◽  
Vol 12 ◽  
Author(s):  
Ya-Jun Shi ◽  
Jin-Li Wang ◽  
Ling Gao ◽  
Dong-Lin Wen ◽  
Qing Dan ◽  
...  
Keyword(s):  
Blood Pressure ◽  
High Altitude ◽  
Sea Level ◽  
Exercise Intensity ◽  
Exercise Tolerance ◽  
Acute Mountain Sickness ◽  
Young Men ◽  
Acute Exposure ◽  
Physiological Variables ◽  
Metabolic Equivalents

Many sea-level residents suffer from acute mountain sickness (AMS) when first visiting altitudes above 4,000 m. Exercise tolerance also decreases as altitude increases. We observed exercise capacity at sea level and under a simulated hypobaric hypoxia condition (SHHC) to explore whether the response to exercise intensity represented by physiological variables could predict AMS development in young men. Eighty young men from a military academy underwent a standard treadmill exercise test (TET) and biochemical blood test at sea level, SHHC, and 4,000-m altitude, sequentially, between December 2015 and March 2016. Exercise-related variables and 12-lead electrocardiogram parameters were obtained. Exercise intensity and AMS development were investigated. After exposure to high altitude, the count of white blood cells, alkaline phosphatase and serum albumin were increased (P < 0.05). There were no significant differences in exercise time and metabolic equivalents (METs) between SHHC and high-altitude exposures (7.05 ± 1.02 vs. 7.22 ± 0.96 min, P = 0.235; 9.62 ± 1.11 vs. 9.38 ± 1.12, P = 0.126, respectively). However, these variables were relatively higher at sea level (8.03 ± 0.24 min, P < 0.01; 10.05 ± 0.31, P < 0.01, respectively). Thus, subjects displayed an equivalent exercise tolerance upon acute exposure to high altitude and to SHHC. The trends of cardiovascular hemodynamics during exercise under the three different conditions were similar. However, both systolic blood pressure and the rate–pressure product at every TET stage were higher at high altitude and under the SHHC than at sea level. After acute exposure to high altitude, 19 (23.8%) subjects developed AMS. Multivariate logistic regression analysis showed that METs under the SHHC {odds ratio (OR) 0.355 per unit increment [95% confidence intervals (CI) 0.159−0.793], P = 0.011}, diastolic blood pressure (DBP) at rest under SHHC [OR 0.893 per mmHg (95%CI 0.805−0.991), P = 0.030], and recovery DBP 3 min after exercise at sea level [OR 1.179 per mmHg (95%CI 1.043−1.333), P = 0.008] were independently associated with AMS. The predictive model had an area under the receiver operating characteristic curve of 0.886 (95%CI 0.803−0.969, P < 0.001). Thus, young men have similar exercise tolerance in acute exposure to high altitude and to SHHC. Moreover, AMS can be predicted with superior accuracy using characteristics easily obtainable with TET.

Effect of exercise intensity on Nrf2 signalling in young men

2017 ◽  
Vol 51 (6) ◽  
pp. 646-655 ◽  
Author(s):  
Aaron J. Done ◽  
Michael J. Newell ◽  
Tinna Traustadóttir
Keyword(s):  
Exercise Intensity ◽  
Young Men
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