Hi, Tremors while lifting weights can be caused by several factors. One possibility is that you are pushing yourself too hard, causing your muscles to fatigue and shake. This is a common occurrence when lifting weights, particularly when performing exercises that target smaller muscle groups. Another possibility is that you have an underlying medical condition that is causing the tremors. Conditions such as essential tremors, Parkinson s disease, or multiple sclerosis can cause involuntary muscle movements or tremors. Low levels of vitamin D can also cause muscle weakness and tremors. While you have stated that you are back on track with your vitamin D levels, it may take time for your body to fully recover from the deficiency. If you are experiencing tremors while lifting weights, it is important to listen to your body and not push yourself too hard. Start with lighter weights and gradually increase the weight as your muscles become stronger. If the tremors persist or worsen, it may be a good idea to see a healthcare provider to rule out any underlying medical conditions. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Priyanka, General & Family Physician