PHOENIX - It takes a lot of mental and physical strength to even consider exercising in excruciating heat — especially when temperatures reach above 100 degrees in Arizona.

12 News conducted a Facebook Live with the Phoenix firefighters Thursday.

Besides taking a look at how they acclimate to the heat, we also wanted to show that it takes work and training to do any physical activity during the summers in Arizona.

The firefighters demonstrated exactly what it takes to acclimate to weather reaching above 100 degrees.

The obstacle took about 15 minutes, but according to Public Information Officer Larry Subervi, the firefighters typically work out an obstacle for at least 10 to 15 minutes.

If they go beyond that, it could cause them major fatigue.

One of the firefighters in the Facebook Live, named Dillon Winiecki, said that the weather could hit 106 degrees outside, but inside their gear it feels like 1000 degrees.

Thank you for all that you do, firefighters!