Re: Tip of the day
Posted: Sun Jul 23, 2023 7:34 am
Every summer I read about people dying from the heat such as https://www.nbcsandiego.com/news/local/ ... 20symptoms.
Solar irradiance is about 1000W/sq m at noon on a clear day, that is a lot of heat.
Locally, every year there are rescues (and even deaths ) in the San Diego backcountry of hikers and bikers.
Tips:
1. Wear a wide brimmed hat, it will keep the sun off much of your body and prevent sunburn. Mini shade.
2. Clothes should be thin, light, loose fitting and SPF50. On the float tube, I wear a light colored long sleeve shirt and light colored short fingered sun gloves.
3. Use evaporative cooling when you are on the water. As simple as putting a wet towel around your neck (you can also buy special towels too). If you have a hat, long sleeved shirt and sun gloves on, dip those in the water too. Use your hat to scoop up water and splash on your waders (roll chest waders down too). A cloth hat will work better than a straw hat for evaporative cooling.
4. Have plenty of water. My float tube holds 2 bike water bottles (24 ounces each) and each bottle has a cloth jacket that can be dipped in the water for evaporative cooling. The company that makes the jacket isn't in business anymore but a repurposed large size sock should work too.
5. Eat enough salt and food. You will go thru a lot of salt sweating. Save the low salt diet for when you aren't sweating. I like having beef jerky when it's hot for salt. Similarly, get enough calories, especially if exercising.
6. Wear sun protection: sun screen, SPF50 clothes, sunglasses. Sunburn will just add to your problems.
7. Symptoms of heat exhaustion include lightheadedness and dizziness. Stop physical activity and find shade. Water and something salty (food or sport drink) will help. https://www.mayoclinic.org/diseases-con ... c-20373250
8. A hydration pack (e.g. Camelbak) can be filled with ice water instead of plain water. Can even be filled half way and frozen before topping of with water. Cold liquids (not beer) really help get the body temperature down.
9. If you are drinking water but don't have to pee at all, you are probably still getting dehydrated. If it is hot and you are not drinking, you are definitely dehydrated. But no need to over do the drinking thing, way too much water without electrolytes can cause problems too, even death. Urine should be a light yellow, dark or none is dehydration, clear is over hydration.
10. Much of the water loss is just from breathing. And when the humidity is low, you can still be sweating a lot but it just evaporates rapidly so you never feel sweaty.
11. If you have muscle cramps (often from dehydration), pickle juice works wonders. You can even buy packets of it.
Solar irradiance is about 1000W/sq m at noon on a clear day, that is a lot of heat.
Locally, every year there are rescues (and even deaths ) in the San Diego backcountry of hikers and bikers.
Tips:
1. Wear a wide brimmed hat, it will keep the sun off much of your body and prevent sunburn. Mini shade.
2. Clothes should be thin, light, loose fitting and SPF50. On the float tube, I wear a light colored long sleeve shirt and light colored short fingered sun gloves.
3. Use evaporative cooling when you are on the water. As simple as putting a wet towel around your neck (you can also buy special towels too). If you have a hat, long sleeved shirt and sun gloves on, dip those in the water too. Use your hat to scoop up water and splash on your waders (roll chest waders down too). A cloth hat will work better than a straw hat for evaporative cooling.
4. Have plenty of water. My float tube holds 2 bike water bottles (24 ounces each) and each bottle has a cloth jacket that can be dipped in the water for evaporative cooling. The company that makes the jacket isn't in business anymore but a repurposed large size sock should work too.
5. Eat enough salt and food. You will go thru a lot of salt sweating. Save the low salt diet for when you aren't sweating. I like having beef jerky when it's hot for salt. Similarly, get enough calories, especially if exercising.
6. Wear sun protection: sun screen, SPF50 clothes, sunglasses. Sunburn will just add to your problems.
7. Symptoms of heat exhaustion include lightheadedness and dizziness. Stop physical activity and find shade. Water and something salty (food or sport drink) will help. https://www.mayoclinic.org/diseases-con ... c-20373250
8. A hydration pack (e.g. Camelbak) can be filled with ice water instead of plain water. Can even be filled half way and frozen before topping of with water. Cold liquids (not beer) really help get the body temperature down.
9. If you are drinking water but don't have to pee at all, you are probably still getting dehydrated. If it is hot and you are not drinking, you are definitely dehydrated. But no need to over do the drinking thing, way too much water without electrolytes can cause problems too, even death. Urine should be a light yellow, dark or none is dehydration, clear is over hydration.
10. Much of the water loss is just from breathing. And when the humidity is low, you can still be sweating a lot but it just evaporates rapidly so you never feel sweaty.
11. If you have muscle cramps (often from dehydration), pickle juice works wonders. You can even buy packets of it.