Abstract
Objective: To examine the effect of ascent rate on the induction of acute mountain sickness (AMS) in young adults during a climb to Jiaming Lake (3350 m) in Taiwan. Design: Prospective, nonrandomized. Setting: Climb from 2370 to 3350 m. Participants: Young adults (aged 18 to 26 years) (N = 91) chose to participate in either the fast ascent (3 days; n = 43) or slow ascent (4 days; n = 48) group (1 and 2). Assessment of Risk Factors: Two criteria were used to define AMS. A Lake Louise score $3 and Lake Louise criteria [in the setting of a recent gain in altitude, the presence of headache and at least 1 of gastrointestinal discomfort (anorexia, nausea, or vomiting), fatigue or weakness, dizziness or lightheadedness, or difficulty sleeping]. Main Outcome Measures: Heart rate, blood oxygen saturation (SaO2), and symptoms of AMS were monitored each morning and evening. Results: Baseline characteristics were similar between groups, except for significant differences in history of alcohol consumption (P = 0.009) and climbing experience above 3000 m (P, 0.001). The incidence of AMS was not associated with the rate of ascent. Acute mountain sickness was most prevalent in group 1 on day 2 in the evening and in group 2 on day 3 in the evening. In both groups, AMS correlated with the initial reduction in SaO2. Body mass index (BMI).24 kg/m2 was identified as a significant risk factor for AMS. Conclusions: The development of AMS was closely associated with an initial reduction in SaO2. A BMI.24 kg/m2 also contributed to the occurrence of AMS. Clinical Relevance: These findings indicate that factors other than ascent rate should be considered when trying to ameliorate the risk of AMS.
| Original language | English |
|---|---|
| Pages (from-to) | 95-104 |
| Number of pages | 10 |
| Journal | Clinical Journal of Sport Medicine |
| Volume | 25 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Mar 10 2015 |
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Keywords
- acute mountain sickness
- ascent rate
- body mass index
- heart rate
- oxygen Saturation
ASJC Scopus subject areas
- Orthopedics and Sports Medicine
- Physical Therapy, Sports Therapy and Rehabilitation
Cite this
Rate of ascent and acute mountain sickness at high altitude. / Hsu, Tai Yi; Weng, Yi Ming; Chiu, Yu Hui; Li, Wen Cheng; Chen, Pang Yen; Wang, Shih Hao; Huang, Kuo Feng; Kao, Wei Fong; Chiu, Te Fa; Chen, Jih Chang.
In: Clinical Journal of Sport Medicine, Vol. 25, No. 2, 10.03.2015, p. 95-104.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Rate of ascent and acute mountain sickness at high altitude
AU - Hsu, Tai Yi
AU - Weng, Yi Ming
AU - Chiu, Yu Hui
AU - Li, Wen Cheng
AU - Chen, Pang Yen
AU - Wang, Shih Hao
AU - Huang, Kuo Feng
AU - Kao, Wei Fong
AU - Chiu, Te Fa
AU - Chen, Jih Chang
PY - 2015/3/10
Y1 - 2015/3/10
N2 - Objective: To examine the effect of ascent rate on the induction of acute mountain sickness (AMS) in young adults during a climb to Jiaming Lake (3350 m) in Taiwan. Design: Prospective, nonrandomized. Setting: Climb from 2370 to 3350 m. Participants: Young adults (aged 18 to 26 years) (N = 91) chose to participate in either the fast ascent (3 days; n = 43) or slow ascent (4 days; n = 48) group (1 and 2). Assessment of Risk Factors: Two criteria were used to define AMS. A Lake Louise score $3 and Lake Louise criteria [in the setting of a recent gain in altitude, the presence of headache and at least 1 of gastrointestinal discomfort (anorexia, nausea, or vomiting), fatigue or weakness, dizziness or lightheadedness, or difficulty sleeping]. Main Outcome Measures: Heart rate, blood oxygen saturation (SaO2), and symptoms of AMS were monitored each morning and evening. Results: Baseline characteristics were similar between groups, except for significant differences in history of alcohol consumption (P = 0.009) and climbing experience above 3000 m (P, 0.001). The incidence of AMS was not associated with the rate of ascent. Acute mountain sickness was most prevalent in group 1 on day 2 in the evening and in group 2 on day 3 in the evening. In both groups, AMS correlated with the initial reduction in SaO2. Body mass index (BMI).24 kg/m2 was identified as a significant risk factor for AMS. Conclusions: The development of AMS was closely associated with an initial reduction in SaO2. A BMI.24 kg/m2 also contributed to the occurrence of AMS. Clinical Relevance: These findings indicate that factors other than ascent rate should be considered when trying to ameliorate the risk of AMS.
AB - Objective: To examine the effect of ascent rate on the induction of acute mountain sickness (AMS) in young adults during a climb to Jiaming Lake (3350 m) in Taiwan. Design: Prospective, nonrandomized. Setting: Climb from 2370 to 3350 m. Participants: Young adults (aged 18 to 26 years) (N = 91) chose to participate in either the fast ascent (3 days; n = 43) or slow ascent (4 days; n = 48) group (1 and 2). Assessment of Risk Factors: Two criteria were used to define AMS. A Lake Louise score $3 and Lake Louise criteria [in the setting of a recent gain in altitude, the presence of headache and at least 1 of gastrointestinal discomfort (anorexia, nausea, or vomiting), fatigue or weakness, dizziness or lightheadedness, or difficulty sleeping]. Main Outcome Measures: Heart rate, blood oxygen saturation (SaO2), and symptoms of AMS were monitored each morning and evening. Results: Baseline characteristics were similar between groups, except for significant differences in history of alcohol consumption (P = 0.009) and climbing experience above 3000 m (P, 0.001). The incidence of AMS was not associated with the rate of ascent. Acute mountain sickness was most prevalent in group 1 on day 2 in the evening and in group 2 on day 3 in the evening. In both groups, AMS correlated with the initial reduction in SaO2. Body mass index (BMI).24 kg/m2 was identified as a significant risk factor for AMS. Conclusions: The development of AMS was closely associated with an initial reduction in SaO2. A BMI.24 kg/m2 also contributed to the occurrence of AMS. Clinical Relevance: These findings indicate that factors other than ascent rate should be considered when trying to ameliorate the risk of AMS.
KW - acute mountain sickness
KW - ascent rate
KW - body mass index
KW - heart rate
KW - oxygen Saturation
UR - http://www.scopus.com/inward/record.url?scp=84924595640&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84924595640&partnerID=8YFLogxK
U2 - 10.1097/JSM.0000000000000098
DO - 10.1097/JSM.0000000000000098
M3 - Article
C2 - 24751723
AN - SCOPUS:84924595640
VL - 25
SP - 95
EP - 104
JO - Clinical Journal of Sport Medicine
JF - Clinical Journal of Sport Medicine
SN - 1050-642X
IS - 2
ER -