Sökning: WFRF:(Johansson H.)
> Gymnastik- och idrottshögskolan >
Energy turnover dur...
Energy turnover during 24 hours and 6 days of adventure racing.
-
- Enqvist, Jonas K (författare)
- Mittuniversitetet,Gymnastik- och idrottshögskolan,Björn Ekbloms forskningsgrupp,Institutionen för hälsovetenskap (-2013)
-
- Mattsson, C Mikael (författare)
- Karolinska Institutet,Gymnastik- och idrottshögskolan,Björn Ekbloms forskningsgrupp
-
- Johansson, Patrik H (författare)
- Gymnastik- och idrottshögskolan,Björn Ekbloms forskningsgrupp
-
visa fler...
-
- Brink-Elfegoun, Thibault (författare)
- Gymnastik- och idrottshögskolan,Björn Ekbloms forskningsgrupp
-
- Bakkman, Linda (författare)
- Mittuniversitetet,Gymnastik- och idrottshögskolan,Institutionen för hälsovetenskap (-2013)
-
- Ekblom, Björn (författare)
- Gymnastik- och idrottshögskolan,Björn Ekbloms forskningsgrupp
-
visa färre...
-
(creator_code:org_t)
- Routledge, 2010
- 2010
- Engelska.
-
Ingår i: Journal of Sports Sciences. - : Routledge. - 0264-0414 .- 1466-447X. ; 28:9, s. 947-955
- Relaterad länk:
-
https://urn.kb.se/re...
-
visa fler...
-
https://doi.org/10.1...
-
https://urn.kb.se/re...
-
http://kipublication...
-
visa färre...
Abstract
Ämnesord
Stäng
- Energy turnover was assessed in two conditions of mixed ultra-endurance exercise. In Study 1, energy expenditure and intake were measured in nine males in a laboratory over 24 h. In Study 2, energy expenditure was assessed in six males during an 800-km Adventure race (mean race time 152.5 h). Individual correlations between heart rate and oxygen uptake ([Vdot]O(2)) were established during pre-tests when kayaking, cycling, and running. During exercise, energy expenditure was estimated from continuous heart rate recordings. Heart rate and [Vdot]O(2) were measured regularly during fixed cycling work rates to correct energy expenditure for drift in oxygen pulse. Mean energy expenditure was 18,050 +/- 2,390 kcal (750 +/- 100 kcal . h(-1)) and 80,000 +/- 18,000 kcal (500 +/- 100 kcal . h(-1)) in Study 1 and Study 2 respectively, which is higher than previously reported. Energy intake in Study 1 was 8,450 +/- 1,160 kcal, resulting in an energy deficit of 9,590 +/- 770 kcal. Body mass decreased in Study 1 (-2.3 +/- 0.8 kg) but was unchanged in Study 2. Fat mass decreased in Study 2 (-2.3 +/- 1.5 kg). In Study 1, muscle glycogen content decreased by only 60%. Adventure racing requires a high energy expenditure, with large inter-individual variation. A large energy deficit is caused by inadequate energy intake, possibly due to suppressed appetite and gastrointestinal problems. The oxygen pulse, comparing start to 12 h of exercise and beyond, increased by 10% and 5% in Study 1 and Study 2 respectively. Hence, estimations of energy expenditure from heart rate recordings should be corrected according to this drift.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Fysiologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Physiology (hsv//eng)
- MEDICIN OCH HÄLSOVETENSKAP -- Hälsovetenskap -- Idrottsvetenskap (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Health Sciences -- Sport and Fitness Sciences (hsv//eng)
Nyckelord
- Energy intake; energy expenditure; ultra-endurance exercise; muscle glycogen; fat mass
- Physiology
- Fysiologi
- Medicin/Teknik
- Medicine/Technology
- Sports
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas