The other day i did a lot of calf raises and now my calves are sore. But also my upper left pelvis and lower back hurt. Can that because of doing calf raises? 


I am sorry to hear that you are having pain in your left pelvis and lower back after doing calf raises. While I cannot make specific recommendations regarding your case without doing a thorough evaluation, I can offer some general information that may be helpful for you.  While this is not an ideal response to calf raises, it can be the effects of poor form. One of the very common errors seen with calf raises is going into lumbar extension (increased low back arch) as you lift the heel. If you were doing a high number of repetitions as you say, this could lead to soreness in the back and pelvic region. This is particularly common on standing calf raise machines where the weight of the resistance is compressing down through the shoulders. One thing you could attempt right away is trying to be very strict with your trunk motion when you are doing a calf raise so that you stay very strong through the core and are not arching at the low back as you do calf raises.   

With all that said, there may be other factors that contributed to your pain response such as core stabilization deficits or calf weakness. A physical therapist could evaluate your strengths and weaknesses and match where you are now with exercises that fit your current strength and mobility level. I suggest that you attempt to make some simple corrections that I suggested initially, but if you are continuing to have soreness in the back you should strongly consider seeking care from a physical therapist for further evaluation.  

**This reply is for informational purposes only. It’s not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician, physical therapist, or other qualified health provider with a medical condition.