A5025529887- Cardiovascular and exercise physiology
- High Altitude and Hypoxia
- Muscle metabolism and nutrition
- Exercise and Physiological Responses
- Sports Performance and Training
- Thermoregulation and physiological responses
- Erythropoietin and Anemia Treatment
- Iron Metabolism and Disorders
- Cardiovascular Effects of Exercise
- Chronic Obstructive Pulmonary Disease (COPD) Research
- Heart Rate Variability and Autonomic Control
- Muscle activation and electromyography studies
- Cardiovascular and Diving-Related Complications
- Diet and metabolism studies
- Genetics and Physical Performance
- Respiratory Support and Mechanisms
- Hemoglobinopathies and Related Disorders
- Sports and Physical Education Research
- Lower Extremity Biomechanics and Pathologies
- Cancer, Hypoxia, and Metabolism
- Adipose Tissue and Metabolism
- Metabolomics and Mass Spectrometry Studies
Asics (Japan)
2024-2025
Japan Society for the Promotion of Science
2019-2024
Osaka Metropolitan University
2023-2024
Osaka City University
2020-2023
Tokyo Metropolitan University
2023
Ritsumeikan University
2016-2021
Juntendo University
2016
Mount Fuji Research Institute
2016
National Institute of Fitness and Sports in Kanoya
2016
University of Shizuoka
2016
Purpose : Although it is anecdotally believed that fluctuating running speed during competition has a negative impact on performance, its influence physiological strain remains unclear. Therefore, the purpose of present study was to determine effect 10-km compared with constant speed. Methods Ten male endurance runners completed 2 trials different days, consisting either (FLU) or (CON) treadmill. In CON trial, at 80% maximal oxygen uptake ( ), while fluctuated between 75% and 85% in FLU...
Iron is essential for providing oxygen to working muscles during exercise, and iron deficiency leads decreased exercise capacity endurance events. However, the mechanism of among athletes remains unclear. In this study, we compared status between two periods involving different training regimens. Sixteen female long-distance runners participated. Over a seven-month period, fasting blood samples were collected their regular period (LOW; middle February) an intensified (INT; late August)...
Sumi, D, Kojima, C, and Goto, K. Impact of endurance exercise in hypoxia on muscle damage, inflammatory performance responses. J Strength Cond Res 32(4): 1053-1062, 2018-This study evaluated damage responses after high-intensity moderate among athletes. Nine trained athletes completed 2 different trials days: under (H trial, FiO2 = 14.5%) normoxia (N 20.9%). They performed interval exercises (10 × 3-minute running at 95% V[Combining Dot Above]O2max with 60-second active rest 60% Above]O2max)...
Abstract The present study was designed to determine the effect of 5 consecutive days repeated sprint training under hypoxia on anaerobic performance and energy substances. Nineteen male sprinters performed sprints for a hypoxic (HYPO; fraction inspired oxygen [FiO2], 14.5%) or normoxic (NOR; FiO2, 20.9%) condition. Before after period, 10-s maximal sprint, ability (5×6-s sprints), 30-s uptake (VO2max) tests were conducted. Muscle glycogen PCr contents evaluated using carbon magnetic...
Physically active status is an important contributor to individual health. Walking regarded as commonly accepted exercise for promotion. Particularly, interval fast walking (FW), consisting of alternating between and slow speeds, has gained popularity from practical viewpoints. Although previous studies have determined the short- long-term effects FW programs on endurance capacity cardiovascular variables, factors affecting these outcomes not been clarified. In addition physiological...
Background Hepcidin is an iron regulating hormone, and exercise-induced hepcidin elevation suggested to increase the risk of deficiency among athletes. Objective We compared serum responses resistance exercise endurance (cycling) exercise. Methods Ten males [mean ± standard error: 172 2 cm, body weight: 70 kg] performed three trials: a trial (RE), (END), rest (REST). The RE consisted 60 min (3−5 sets × 12 repetitions, 8 exercises) at 65% one repetition maximum, while cycling V˙O2max was in...
ABSTRACT Purpose We hypothesized that respiratory muscle endurance training (RMET) in hypoxia induces greater improvements with attenuated metaboreflex and consequent whole-body performance. evaluated cardiovascular response during hyperpnoea running performance before after RMET normoxia hypoxia. Methods Twenty-one collegiate runners were assigned to control ( n = 7), normoxic hypoxic 7) groups. Before the 6 wk of RMET, incremental test constant exercise tests performed. The was performed...
Exercise-induced disturbance of acid-base balance and accumulation extracellular potassium (K+) are suggested to elicit fatigue. Exercise under hypoxic conditions may augment exercise-induced alterations these two factors compared with exercise normoxia. In the present study, we investigated kinetics in response moderate endurance athletes.Nine trained middle-to-long distance athletes [maximal oxygen uptake (VO2max) 57.2 ± 1.0 mL/kg/min] completed different trials on days, consisting hypoxia...
To investigate the carbohydrate metabolism, acid-base balance, and potassium kinetics in response to exercise moderate hypoxia among endurance athletes.Nine trained athletes [maximal oxygen uptake (VO2max): 62.5 ± 1.2 mL/kg/min] completed two different trials on days: either [fraction of inspired (FiO2) = 14.5%, HYPO] or normoxia (FiO2 20.9%, NOR). They performed a high-intensity interval-type consisting 10 × 3 min runs at 90% VO2max with 60 s running (active rest) 50% between sets (HYPO)...
We compared upper-limb muscle oxygenation responses during repeated double-poling sprint exercise in normobaric hypoxia and normoxia. Eight male kayakers completed a (3 × 3 20-s maximal sprints, 40-s passive recovery, 5-min rest) either (HYP, FiO2 = 14.5%) or normoxia (NOR, 20.9%). Power output, of triceps brachii (using near infrared spectroscopy), arterial oxygen saturation, cardiorespiratory variables were monitored. Mean power output tended to be lower (-5.2%; P 0.06) HYP with NOR, while...
[Purpose] The present study investigated the effect of endurance exercise with blood flow restriction (BFR) performed at either 25% maximal oxygen uptake (V˙O2 max) or 40% V˙O2 on muscle oxygenation, energy metabolism, and endocrine responses. [Methods] Ten males were recruited in study. subjects three trials: (1) max without BFR (NBFR40), (2) (BFR25), (3) (BFR40). exercises for 15 min during which pedaling frequency was set 70 rpm. In BFR25 BFR40, 2 pressure phase (equivalent to 160 mmHg)...
To determine the effects of heat acclimation on gastrointestinal (GI) damage and gastric emptying (GE) rate following endurance exercise in a hot environment. Fifteen healthy men were divided into two groups: training (HOT, 35 °C, n = 8) or cool (COOL, 18 7) All subjects completed 10 days (eight sessions 60 min continuous at 50% maximal oxygen uptake (V·O2max). Subjects stress tests (HST, 60% V·O2max) to evaluate plasma intestinal fatty acid-binding protein (I-FABP) level GE environment (35...
The purpose of the present study was to determine influence hypoxic exposure during prolonged endurance exercise sessions (79 min in total) on post-exercise hepcidin levels trained male athletes. Ten athletes (mean ± standard deviation; height: 169.8 7.1 cm, weight: 57.1 5.0 kg) conducted two under either a normobaric condition [inspired O2 fraction (FiO2) = 14.5%] or normoxic (FiO2 20.9%). Exercise consisted 10 × 3 running treadmill at 95% maximal oxygen uptake ([Formula: see text]) with...
The present study was designed to determine the effects of repeated-sprint exercise in moderate hypoxia on inflammatory, muscle damage, oxidative stress, and angiogenic growth factor responses among athletes. Ten male college track field sprinters [mean ± standard error (SE): age, 20.9 0.1 years; height, 175.7 1.9 cm; body weight, 67.3 2.0 kg] performed two trials either [HYPO; fraction inspired oxygen (FiO2), 14.5%] or normoxia (NOR; FiO2, 20.9%). consisted three sets 5 s × 6 maximal...
Purpose Endurance exercise in hypoxia promotes carbohydrate (CHO) metabolism. However, detailed CHO metabolism remains unclear. The purpose of this study was to evaluate the effects endurance moderate on exogenous glucose oxidation at same energy expenditure or relative intensity. Methods Nine active healthy males completed three trials different days, consisting 30 min running each intensity: (a) 65% normoxic maximal oxygen uptake normoxia [NOR, fraction inspired (FiO2) = 20.9%, 10.6 ± 0.3...
The present study compared energy metabolism between walking and running at equivalent speeds during two incremental exercise tests.Thirty four university students (18 males, 16 females) were recruited. Each participant completed trials, consisting of (Walk) (Run) trials on different days, with 2-3 days apart. Exercise a treadmill was started from initial stage 3 min (3.0 k/m in Walk trial, 5.0 km/h Run trial), the speed for progressively every minute by 0.5 km/h. changes metabolic...
Purpose : Long-distance running performance has been reported to be associated with sprint in highly trained distance runners. Therefore, we hypothesized that training could enhance and long-distance This study examined the effect of 6-week on Methods Nineteen college runners were divided into control (n = 8) 11) groups. Participants group performed 12 sessions 6 weeks, while those sessions. Before after interventions, maximal oxygen uptake ( ), O 2 cost during submaximal (290 m·min −1 310...
Abstract The present study examined the effects of gastric emptying rate and intestinal cell damage following a single session endurance exercise under “hypoxic” or “normoxic” conditions at same relative intensity. Eleven healthy males performed two trials on different days, consisting 60 min run treadmill 70% maximal running velocity (vMax) while inspiring hypoxic (F i O 2 : 14.5%; HYP) normoxic air 20.9%; NOR). average was 11.4 ± 0.7 km/h in NOR 10.8 0.5 HYP, respectively. Venous blood...
Aspartate supplementation has been reported to improve endurance performance by facilitating the tricarboxylic acid cycle flux. The present study was performed investigate effects of aspartate on repeated-sprint and blood pH. Following an overnight fast, fourteen healthy males completed three sets 10 × 6 s maximal sprints after consuming sodium L-aspartate (ASP) or placebo (PLA), in a double-blind manner. Both supplements were taken twice each test day (2 4.5 g). Exercise (e.g., cadence...
Aims] Skyrunning (SR) is an extreme sport of mountain running above 2,000 meters, and the number participants in SR rapidly increasing Europe.In Japan, has been growing popularity since establishment Japan Association (JSA) 2013.However, physical loads during remain unknown.The purpose this study was to examine effects on runners.[Methods] 7 healthy males females performed skyrunning (from 1,500 m 2700 altitude) followed by a pre-test (20 shuttle-run, weight bearing index, vertical jump,...
Purpose: The purpose of this study was to determine the effect 3 consecutive days endurance training under hypoxia on muscle damage, inflammation, and performance responses. Methods: Nine active healthy males completed two trials in different periods, consisting either [fraction inspired oxygen (F io 2 ): 14.5%, HYP] or normoxia : 20.9%, NOR). They performed daily 90-min sessions high-intensity interval pedaling [10 × 4-min at 80% maximal uptake ( <mml:math...