Lipitor is a medication that is used to lower cholesterol levels in the body [1]. According to the Mayo Clinic [2], there are no specific dietary restrictions that are necessary while taking Lipitor before exercise. However, it is important to note that some individuals may experience muscle pain or weakness as a side effect of taking statins, such as Lipitor. In such cases, it may be helpful to avoid consuming grapefruit or grapefruit juice, as it can increase the risk of side effects [2]. Additionally, it is recommended to maintain a healthy and balanced diet while taking Lipitor, as this can help to improve cholesterol levels and reduce the risk of cardiovascular disease [3]. It is important to consult with a healthcare provider before making any significant changes to your diet or exercise routine while taking Lipitor or any other medication.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statin-side-effects/art-20046013
[3] https://www.health.harvard.edu/pain/managing-statin-muscle-pain