Lipitor is a medication used to lower cholesterol levels in the body. It belongs to a class of drugs called statins [1]. Statins work by inhibiting the enzyme HMG-CoA reductase, which is involved in the production of cholesterol in the liver [2]. Exercise, on the other hand, has been shown to have a positive effect on cholesterol levels. A study published in the Journal of Lipid Research found that regular exercise can increase the activity of an enzyme called lipoprotein lipase, which helps to break down triglycerides in the blood and increase levels of HDL, or "good" cholesterol [3].

While exercise can have a positive effect on cholesterol levels, it is not a replacement for medication such as Lipitor in all cases. According to Healthline, lifestyle changes such as exercise and diet modifications may be enough to manage cholesterol levels in some individuals, but for others, medication may be necessary [4]. It is important to consult with a healthcare provider to determine the best course of action for managing cholesterol levels.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4679305/
[3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3906547/
[4] https://www.healthline.com/health/high-cholesterol/statins-diet-exercise