<s>[INST] I many times work around the house and outdoors, and consistently push my physical capabilities too much. I drink plenty of fluids but to no avail I get muscle and tendon cramps so severe they lock up my legs, toes, rib area, etc., you name it. What am I lacking concerning intake? Thank you so much if you have the answer, sincerely, Craig [/INST] Here you have mention, you do lots of Indore as well as outdoor activity and consume enough of fluid but then still you have issues with muscle cramp let me explain you different reason for having muscle cramp some of them are deficiency of vitamin B, less water intake, as well many times' deficiency of magnesium mineral in our body. You can try to improve this by having vitamin B supplement tablet and having foods which contain board of magnesium as a mineral also along with this you should be doing different stretching and strengthening exercises for sure upper limb and lower limb muscles this will help to prevent the locking of your soft tissues. Still if this does not help I suggest taking complete health checkup and do visit orthopedic doctor for further guidelines and medication support. Take care. </s>