This can include second cancers, coronary artery disease, heartfailure, lung problems and endocrine disorders (growth function and slow or delayed sexual development).
By studying the climbers, six of whom reached the summit, the researchers hope to gain insight into heartfailure, lung disease and sleep apnea all conditions related to a low-oxygen, or hypoxic, state.
"Once you are in your 70s, 80s or 90s, or if you have chronic disease like heartfailure, rheumatoid arthritis, chronic lungand kidney disease, a larger body size gives you longevity, " he said.