Workout: Deadlift: 1-1-1-1-1
Accessory: 4×25 Banded Cable Crunches
Chill Out – It’s Only Sweat.
Sweat — It’s as warm as blood. It essentially is blood. Sweat comes from plasma — the watery, colorless portion of blood. Sweat cools by evaporation: offloading your heat into the air. Like this: When you start to overheat, vessels in your skin dilate, encouraging blood to migrate there. Hot plasma is then offloaded through sweat glands onto the surface of the body to evaporate. Evaporation carries heat away from the body, in the form of water vapor.
However, when we exert ourselves, the muscles we’re using begin to demand the very same blood that the body needs to use for sweating. One of the more mild consequences of this competition for blood is heat exhaustion. With blood flowing out to the skin for cooling purposes and, at the same time, into the muscles to deliver oxygen to fuel the work that you are doing, it becomes harder to maintain the blood pressure needed to pump blood up to the brain. Without enough oxygen-carrying blood reaching your brain, you pass out… Or find yourself extremely dizzy.
Heat exhaustion is embarrassing but not particularly dangerous. Fainting is both symptom and cure. Once you’re horizontal on the ground, the blood flows back into your head and you regain consciousness.
Heatstroke, however, can kill. Here too, it begins with a competition for blood. On a hot day, when your body is trying to sweat your core temperature down to the safe range and you haven’t been drinking enough water to replenish your blood volume, and on top of that you’re exercising hard and your muscles are begging for oxygen — and the exercise itself is generating heat — something has to give. The body sacrifices flow to the gut in order to put it where it’s needed; closer to the skin’s surface so as to offload heat. In doing so, the gut and all its internal organs are deprived of blood and the energy carrying properties held within it (i.e., OXYGEN). It’s a killer. The digestive organs start to fail. A systemic inflammatory response sets in, and multi-organ damage ensues. Delirium, sometimes coma, even death, may follow.
So with the warmer temperatures this time of year, and more sweat being produced than normal, comes the added responsibility of keeping hydrated before, DURING and after your workouts.