Yes.
The brain, active muscles, and abdominal region produce more heat because they are more metabolically active.
body heat
Energy that the muscles use release heat as a by-product, which it then cooled by the dilation of blood vessels and sweating.
Muscles in your body convert chemical energy into fat and heat.
Deep tissue massages work out the muscles and release toxins to be flushed out of the body. This can leave the body tired and the muscles sore and tender. If you drink a lot of water, avoid heavy meals and alcohol, stay active, get enough sleep, and even use heat packs, you will be able to recover from your massage more quickly.
When muscles move, they produce body heat.
The most major heat source of the body is the blood cells in our body, however it can be our muscles as well.
They constrict, cramp, & spasm in an attempt to prevent losing body heat.
Muscle activity produces heat so that exercise creates a heat surplus that can actually be fatal. In response to exercise the body has to redirect blood flow to the skin to facilitate heat transfer out of the body.
An animal is less active in summer due to increased body heat.
during cellular respiration sugar breaks down forming heat
The skeletal muscles are responsible for heat generation in the body. This is because they account for 40% of body mass and are required for maintaining body temperature.