Often when a person starts a new fitness routine or increases the intensity of their workouts it causes the body to pull heat away from the body's surface area and directs it to the fatigued muscles. This is felt even more when a person has more fat stores than muscle and why it is more common for women than with men (women tend to have a higher fat to muscle ratio in general than men). This is not a cause for alarm or uncommon but it can be a bit unnerving and uncomfortable. The best way to reduce this effect is to eat a good meal consisting of about 75% carbs and 25% protein within a 1/2 hour to an hour after working out. Rather than a hot shower, soak in a hot bath and drink plenty of water. Adding a dose of magnesium can aid in reducing muscle soreness and depletion.
A few years ago I badly injured my knee which required surgery. I became rather sedentary as a result, gained a bunch of weight and had stopped working out etc. When I finally got sick of being a fat couch potato and started working out again, I was back at square one and quite shocked to see how quickly I had loss muscle mass and physical stamina. I started slow and soon my body responded and so I increased my workouts and the intensity. I began to experience exactly what you are going through. I would be cold for hours and it was not pleasant. Luckily my physiotherapist knew exactly what was happening and encouraged me to keep going but to eat a good meal after working out. It really made a difference as did a hot bath. It lasted off and on for a few weeks and then my body just seemed to adjust to my new exercise habits.
When I told my endocrinologist, he confirmed that for people with low thyroid this is more common and has worked with athletes that have had this complaint. (women are more likely to have low thyroid and make up the largest portion of his practise) I have no thyroid function due to an autoimmune disease and I am often more sensitive to cold than other people. The feeling I had after exercising intensely was new but it did resolve itself within a few weeks.
You may want to pull back in terms of intensity if it is too uncomfortable or push on through until your body adjusts. Either way I would not worry too much, it seems to be part of the process of our bodies adjusting to more activity.
"It's not the years in your life that count. It's the life in your years." - Abe Lincoln
| Pounds lost: 25.6