MEDEX2015: Greater sea-level fitness is associated with lower sense of effort during Himalayan trekking without worse Acute Mountain Sickness
Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
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Yn: High Altitude Medicine and Biology, Cyfrol 18, Rhif 2, 01.06.2017, t. 152-162.
Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
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TY - JOUR
T1 - MEDEX2015
T2 - Greater sea-level fitness is associated with lower sense of effort during Himalayan trekking without worse Acute Mountain Sickness
AU - Rossetti, Gabriella
AU - Macdonald, Jamie
AU - Smith, Matthew
AU - Jackson, Anna
AU - Callender, Nigel
AU - Newcombe, Hannah K.
AU - Storey, Heather
AU - Willis, Sebastian
AU - van den Beukel, Jojanneke
AU - Woodward, Jonathan
AU - Pollard, James
AU - Wood, Benjamin
AU - Newton, Victoria
AU - Virian, Jana
AU - Haswell, Owen
AU - Oliver, Samuel
N1 - Final publication is available from Mary Ann Liebert, Inc., via the DOI in this record
PY - 2017/6/1
Y1 - 2017/6/1
N2 - This study examined the complex relationships of fitness and hypoxic sensitivity with submaximal exercise responses and Acute Mountain Sickness (AMS) at altitude. Determining these relationships is necessary before fitness or hypoxic sensitivity tests can be recommended to appraise individuals’ readiness for altitude. Forty-four trekkers (26 men; 18 women; 20-67 years) completed a loaded walking test and a fitness questionnaire in normoxia to measure and estimate sea-level maximal aerobic capacity (V̇O2max), respectively. Participants also completed a hypoxic exercise test to determine hypoxic sensitivity (cardiac, ventilatory, and arterial oxygen saturation responses to acute hypoxia, FiO2=0.112). One month later all participants completed a three-week trek to 5085m with the same ascent profile. On ascent to 5085m, ratings of perceived exertion (RPEascent), fatigue by Brunel Mood Scale, and AMS were recorded daily. At 5085m, RPE during a fixed workload step test (RPEfixed) and step rate during perceptually-regulated exercise (STEPRPE35) were recorded. Greater sea-level V̇O2max was associated with, and predicted, lower sense of effort (RPEascent r=-0.43; p<0.001; RPEfixed; r =-0.69; p<0.001) and higher step rate (STEPRPE35 r=0.62; p<0.01), but not worse AMS (r=0.13; p=0.4) or arterial oxygen desaturation (r=0.07; p=0.7). Lower RPEascent was also associated with better mood, including less fatigue (r=0.57; p<0.001). Hypoxic sensitivity was not associated with, and did not add to the prediction of submaximal exercise responses or AMS. In conclusion, participants with greater sea-level fitness reported less effort during simulated and actual trekking activities, had better mood (less fatigue), and chose a higher step rate during perceptually-regulated exercise, but did not suffer from worse AMS or arterial oxygen desaturation. Simple sea-level fitness tests may be used to aid preparation for high-altitude travel.
AB - This study examined the complex relationships of fitness and hypoxic sensitivity with submaximal exercise responses and Acute Mountain Sickness (AMS) at altitude. Determining these relationships is necessary before fitness or hypoxic sensitivity tests can be recommended to appraise individuals’ readiness for altitude. Forty-four trekkers (26 men; 18 women; 20-67 years) completed a loaded walking test and a fitness questionnaire in normoxia to measure and estimate sea-level maximal aerobic capacity (V̇O2max), respectively. Participants also completed a hypoxic exercise test to determine hypoxic sensitivity (cardiac, ventilatory, and arterial oxygen saturation responses to acute hypoxia, FiO2=0.112). One month later all participants completed a three-week trek to 5085m with the same ascent profile. On ascent to 5085m, ratings of perceived exertion (RPEascent), fatigue by Brunel Mood Scale, and AMS were recorded daily. At 5085m, RPE during a fixed workload step test (RPEfixed) and step rate during perceptually-regulated exercise (STEPRPE35) were recorded. Greater sea-level V̇O2max was associated with, and predicted, lower sense of effort (RPEascent r=-0.43; p<0.001; RPEfixed; r =-0.69; p<0.001) and higher step rate (STEPRPE35 r=0.62; p<0.01), but not worse AMS (r=0.13; p=0.4) or arterial oxygen desaturation (r=0.07; p=0.7). Lower RPEascent was also associated with better mood, including less fatigue (r=0.57; p<0.001). Hypoxic sensitivity was not associated with, and did not add to the prediction of submaximal exercise responses or AMS. In conclusion, participants with greater sea-level fitness reported less effort during simulated and actual trekking activities, had better mood (less fatigue), and chose a higher step rate during perceptually-regulated exercise, but did not suffer from worse AMS or arterial oxygen desaturation. Simple sea-level fitness tests may be used to aid preparation for high-altitude travel.
U2 - 10.1089/ham.2016.0088
DO - 10.1089/ham.2016.0088
M3 - Article
VL - 18
SP - 152
EP - 162
JO - High Altitude Medicine and Biology
JF - High Altitude Medicine and Biology
SN - 1527-0297
IS - 2
ER -