I was always told water is best; but I’m working in the heat during summers so is anything better than water?
Water is not the right choice for hydration when active in the heat, especially true as we get older. For example, people are unaware of how much potassium we need daily. Adult men need 3500mg. And we sweat out 200mg per Liter, over an hour or two, depending. So a day in the yard here in FL might require 1000mg K (potassium)
As we age, the body’s ability to regulate fluids and electrolytes declines due to reduced thirst sensation, lower total body water (down to ~50-60% in seniors vs. 60-70% in younger adults), and changes in kidney function. Electrolyte drinks, unlike plain water, replenish key minerals lost in sweat such as sodium, potassium, magnesium, and calcium. All of which are critical for muscle function, nerve signaling, and fluid balance.
There really was a reason people healthy dropped dead on epic journeys in years past. They failed to bring Brawndo along...
One possible solution:
NUUN hydration tablets: Provides 300 mg sodium, 150 mg potassium, 25 mg magnesium, and 40 mg calcium per tablet (dissolved in 16 oz water) with only 1 g sugar.
A DIY drink:
Mix 1 L water + 1 tsp salt (2300 mg sodium) + 2 tbsp maple syrup (for trace potassium and carbs) + juice of 1 lemon or lime (for flavor and trace potassium). Add 1/8 tsp magnesium citrate powder (50 mg magnesium, available at pharmacies) and a pinch of calcium citrate (50 mg calcium, if needed). Bring a banana along.
Adding potassium tablets to a DIY drink may make the taste nasty and impossible to drink (ask me how I know), so a banana is better.