Shortening Work-Rest Durations Reduces Physiological and Perceptual Load during Uphill Walking in Simulated Cold High-Altitude Conditions
| Parent link: | High Altitude Medicine and Biology Vol. 21, iss. 3.— 2020.— [P. 249-257] |
|---|---|
| Autor corporatiu: | |
| Altres autors: | , , , , , , , , , |
| Sumari: | Title screen Shortening work-rest durations re-duces physiological and perceptual load during uphill walking in simulated cold high-altitude conditions.HighAlt Med Biol. 21:249–257, 2020.Background:We investigated the effects of two different work-rest durations on the physiological and per-ceptual responses to a simulated mountain hike in a cold hypoxic environment.Materials and Methods:Twelve healthy nonacclimatized active men (age 31.3–5.3 years, body mass index22.4–1.5 kg/m2) completed a 80-minute work-matched intermittent exercise on a motorized treadmill (25%incline, fixed self-selected speed), in a simulated mountain environment (-25°C, FiO2=11%,&5000 m a.s.l.),wearing extreme cold weather gear, once with short (20·3 minutes walking with 1 minute rest; SHORT) andonce with long (10·6 minutes walking with 2 minutes rest; LONG) work-rest durations. Heart rate (HR), pulseoxygen saturation (SpO2), rate of perceived exertion (RPE), and thermal sensation (TS) were assessed throughoutthe exercise protocols. Cardiac autonomic modulation was assessed before (PRE) and after exercise (POST) insupine position, as well as during standing resting periods by means of HR recovery (HRR) assessment.Results:SpO2and TS were similar (p>0.05) in SHORT and LONG protocols. HR and RPE were increased,and HRR reduced during LONG compared to SHORT (p<0.05). Parasympathetic activity indices were re-duced at POST after both protocols (p<0.05), but to a lesser extent after SHORT (p<0.05).Conclusions:Reduced work-rest durations are associated with improved perceptual responses and less per-turbation of cardiac autonomic balance, compared to longer work-rest durations. Shorter exercise periods frommore frequent breaks during hikes at high altitude may represent a valid strategy to limit the impact of exerciseunder extreme environmental conditions. |
| Idioma: | anglès |
| Publicat: |
2020
|
| Matèries: | |
| Accés en línia: | https://doi.org/10.1089/ham.2019.0136 |
| Format: | Electrònic Capítol de llibre |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=666439 |
MARC
| LEADER | 00000naa0a2200000 4500 | ||
|---|---|---|---|
| 001 | 666439 | ||
| 005 | 20250215171135.0 | ||
| 035 | |a (RuTPU)RU\TPU\network\37643 | ||
| 035 | |a RU\TPU\network\37641 | ||
| 090 | |a 666439 | ||
| 100 | |a 20211224d2020 k||y0rusy50 ba | ||
| 101 | 0 | |a eng | |
| 102 | |a US | ||
| 135 | |a drgn ---uucaa | ||
| 181 | 0 | |a i | |
| 182 | 0 | |a b | |
| 200 | 1 | |a Shortening Work-Rest Durations Reduces Physiological and Perceptual Load during Uphill Walking in Simulated Cold High-Altitude Conditions |f L. D. Zh. Muro, A. Fornasiero, M. Rakobowchuk [et al.] | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 320 | |a [References: 54 tit.] | ||
| 330 | |a Shortening work-rest durations re-duces physiological and perceptual load during uphill walking in simulated cold high-altitude conditions.HighAlt Med Biol. 21:249–257, 2020.Background:We investigated the effects of two different work-rest durations on the physiological and per-ceptual responses to a simulated mountain hike in a cold hypoxic environment.Materials and Methods:Twelve healthy nonacclimatized active men (age 31.3–5.3 years, body mass index22.4–1.5 kg/m2) completed a 80-minute work-matched intermittent exercise on a motorized treadmill (25%incline, fixed self-selected speed), in a simulated mountain environment (-25°C, FiO2=11%,&5000 m a.s.l.),wearing extreme cold weather gear, once with short (20·3 minutes walking with 1 minute rest; SHORT) andonce with long (10·6 minutes walking with 2 minutes rest; LONG) work-rest durations. Heart rate (HR), pulseoxygen saturation (SpO2), rate of perceived exertion (RPE), and thermal sensation (TS) were assessed throughoutthe exercise protocols. Cardiac autonomic modulation was assessed before (PRE) and after exercise (POST) insupine position, as well as during standing resting periods by means of HR recovery (HRR) assessment.Results:SpO2and TS were similar (p>0.05) in SHORT and LONG protocols. HR and RPE were increased,and HRR reduced during LONG compared to SHORT (p<0.05). Parasympathetic activity indices were re-duced at POST after both protocols (p<0.05), but to a lesser extent after SHORT (p<0.05).Conclusions:Reduced work-rest durations are associated with improved perceptual responses and less per-turbation of cardiac autonomic balance, compared to longer work-rest durations. Shorter exercise periods frommore frequent breaks during hikes at high altitude may represent a valid strategy to limit the impact of exerciseunder extreme environmental conditions. | ||
| 461 | |t High Altitude Medicine and Biology | ||
| 463 | |t Vol. 21, iss. 3 |v [P. 249-257] |d 2020 | ||
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a cardiac autonomic recovery | |
| 610 | 1 | |a extreme environments | |
| 610 | 1 | |a heart rate variability | |
| 610 | 1 | |a high altitude | |
| 610 | 1 | |a hypoxia | |
| 610 | 1 | |a вегетативные системы | |
| 610 | 1 | |a экстремальные условия | |
| 610 | 1 | |a сердечные сокращения | |
| 610 | 1 | |a гипоксия | |
| 610 | 1 | |a высота | |
| 610 | 1 | |a нагрузки | |
| 610 | 1 | |a ходьба | |
| 610 | 1 | |a тренировки | |
| 701 | 1 | |a Fornasiero |b A. |g Alessandro | |
| 701 | 1 | |a Savoldelli |b A. |g Aldo | |
| 701 | 1 | |a Stella |b F. |g Federico | |
| 701 | 1 | |a Callovini |b A. | |
| 701 | 1 | |a Bortolan |b L. |g Lorenzo | |
| 701 | 1 | |a Zignoli |b A. |g Andrea | |
| 701 | 1 | |a Low |b D. A. |g David | |
| 701 | 1 | |a Mourot |b L. |c specialist in the field of physical training and sports |c Senior Researcher of Tomsk Polytechnic University, Candidate of philological sciences |f 1977- |g Laurent |3 (RuTPU)RU\TPU\pers\41001 | |
| 701 | 1 | |a Schena |b F. |g Federico | |
| 701 | 1 | |a Pellegrini |b B. |g Barbara | |
| 712 | 0 | 2 | |a Национальный исследовательский Томский политехнический университет |b Школа базовой инженерной подготовки |b Отделение физической культуры |3 (RuTPU)RU\TPU\col\23545 |
| 801 | 2 | |a RU |b 63413507 |c 20220624 |g RCR | |
| 856 | 4 | |u https://doi.org/10.1089/ham.2019.0136 | |
| 942 | |c CF | ||