Lipitor is a brand name for the drug atorvastatin, which is a medication used to lower cholesterol levels in the blood. While there is no direct evidence that Lipitor affects exercise performance, there are potential side effects that could impact physical activity.

One study found that atorvastatin may cause muscle damage in some patients, which could lead to muscle pain and weakness [2]. This could potentially impact exercise performance, as individuals may experience discomfort or difficulty during physical activity.

Additionally, atorvastatin has been associated with an increased risk of developing type 2 diabetes [3]. Diabetes can cause a range of health issues, including nerve damage, which can affect muscle function and physical activity.

However, it is important to note that the potential side effects of atorvastatin are not experienced by everyone who takes the medication, and the benefits of lowering cholesterol levels may outweigh any negative impacts on exercise performance.

Overall, while there is no direct evidence that Lipitor affects exercise performance, potential side effects such as muscle damage and an increased risk of diabetes could impact physical activity in some individuals.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4679305/
[3] https://pubmed.ncbi.nlm.nih.gov/28807461/