Whew! 30 degrees C….
It may sound dumb to go for a 3-4 hour ride when the morning temperature is building up to 30+ degrees C….. which, to you Americans, means 86+ degrees F (what we sometimes call ‘old money’). Well, you may be right but, putting it into context, it makes more sense to go riding than to go walking or running.
If you walk, or even run, in such conditions, and continue for 3-4 hours, you are likely to start pushing your body into heat-stroke meltdown. Why? Well, principally because at the speeds you can run/walk, you can’t benefit much from the air-conditioning effect of a breeze (even if it’s just one you create yourself by your forward motion). Even if you run at 10mph, when there is no appreciable breeze anyway, that wouldn’t be enough to cool down your system. And, as soon as you stop, the sweat will just begin to pour out of you.
Riding a bike, however, in still hot conditions, is a little more forgiving. If you can keep a steady pace of 15-20mph, and take full advantage of downhills to reach 40-50mph, you will have a ready source of air conditioning wafting all about you. Going uphill, of course, is a different matter, and when you come to stop mid-ride or at the end of the ride, you will have the same challenges as runners or walkers. Though you might be tempted to dive into the nearest air conditioned shop just to enjoy that sudden chill, it’s best to avoid that. The body doesn’t like sudden changes, and you can actually end up sweating much more. The body gets confused, as it does when you jump into a cold shower or knock back a few icy drinks.