Exercise skiing

A final category of potential confounders includes the variety of exercise regimens and environments utilized in the research, everything from laboratory cycle ergometers (most common) to cross-country skiing at high altitude in adverse weather conditions. 

The link between dissociation and intrinsic bond energies evidently transcends academic curiosity because of its important down-to-earth practical aspects chemistry, after all, is an exercise of making and breaking chemical bonds, more often than not influenced by the environment in which the reactions occur. Ski is observation, is action. 

The derivative of the normalized overlap matrix element, Ski, equation (48), presents no new challenges and it is a simple exercise to show... 

Recognition of a beneficial effect of exercise on the Incidence of CHD has led to numerous cross-sectional and longitudinal studies designed to examine the Influence of physical activity on major coronary risk factors, with particular emphasis on plasma lipids and lipoproteins. A number of comprehensive reviews have summarized these studies (14-18). In general. In cross-sectional studies, high density lipoprotein (HDL) cholesterol is elevated (14) and total plasma and very low density lipoprotein (VLDL) triglycerides are lower In endurance trained subjects than In sedentary control subjects (14). In a study of 23 top-level male athletes, Lehtonen and Vllkarl (19) found a statistically significant relationship between the number of kilometers that the athletes ran or skied weekly and their plasma HDL cholesterol concentration (P<0.05 r=0.554). Low density lipoprotein (LDL) cholesterol Is frequently lower, and plasma total cholesterol Is Inconsistently lower In trained subjects (19). 

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