Try as we might to fight or deny it, old age will impact our running and athletic ability. By age 35, the rates of decline are so predictably linear that this calculator by a Yale economics professor maps out just how slowly you can expect to run the same distance as the years run by.
Some people sweat more than others. Go for a run with a group of people on a warm day, and the differences become obvious. But what determines these variations? Answers have traditionally focused on factors like body fat percentage (more fat insulates you and makes you overheat sooner) and aerobic fitness (the fitter you are the less you sweat).
28 people is not enough to draw a conclusion from, but the article basically dismisses anything we’ve considered to be truisms to date about fat people sweating more. But it’s been a well-known fact of ecology for ages now that animals tend to be larger (and have smaller ears, tails, etc) in higher latitudes whereas the closer you get to the equator, the smaller creatures get (Bergmann’s rule). I certainly sweat a lot more when the temperature was higher.
Speedy interval sessions require rest between repetitions–and especially when you’re pushing your limits, the natural instinct may be to stop and put your hands on your knees while you catch your breath. But experience teaches us a counterintuitive lesson: Gentle jogging during those precious snippets of recovery sometimes makes it easier to run fast on the next rep. That’s because jogging keeps more blood flowing through your legs, clearing away the metabolic waste products that build up during hard running and contribute to muscle fatigue.
The information applies to most physical activities. The article is on a running-centric website, but mentions the study of cyclists. This should be applicable to swimming… I look forward to updating my training, once my rib heals.
In a 2012 interview for “Faces of MN,” I discussed my answer to the not-infrequent question about what I do for exercise. When I answer that I lift weights and leave it at that, I’m often met with a hesitant follow-up question: “So…what do you do for cardio?”
Interesting read. I was told by a swim coach that when runners were injured, they were told to increase swimming to maintain cardio. It makes sense that, given the right exercise you can get cardio benefits.
There’s not much that’s more essential to your running (and your life) than your blood.
The more oxygen-carrying power your blood has, the faster you can run. Without enough oxygen, your body is quickly plunged into acidosis, the deep burning sensation in your legs that you feel at the end of a race or a hard workout.
Doing anything that would decrease your body’s oxygen-carrying potential would be crazy right?
Blood donation groups like the Red Cross advise against heavy exercise the same day you donate, to avoid reopening the needle wound and because you may feel dizzy or faint from low blood pressure. Be aware that frozen blood has a 48-hour lifespan, compared to four weeks for fresh blood, makes me understand why there are constantly blood drives. But the last time I checked, those on blood thinners are not allowed to donate. If you can, please consider donating or encouraging those who can to donate blood.