Learned something extremely obvious about jumping rope

When I first taught myself how to jump rope, back in 8th grade or so, I initially assumed that you’d just swing the rope around at whatever rate you chose, and then hop over it each time it would otherwise hit you in the feet.

That’s not wrong exactly, but I found it really hard to get the timing right. In particular, I found myself going faster and faster until I couldn’t really keep up. Then I discovered a trick that made it much easier: between each jump over the rope I’d add a little token hop. All of a sudden the timing was much easier. That was how I jumped rope for years (although I mostly didn’t jump rope during those years).

A couple of times in the past few decades I’ve briefly jumped rope again, but at some point I was reading about jumping rope, and learned that this “double-hop” technique is considered poor form. (Because it makes it hard to add any of the fancy stuff you can do with a jump rope, like crisscross or double-under.)

So, I’ve been trying to break myself of this habit. It hasn’t been so hard, since I’m decades away from having formed it with little reinforcement in between.

What I’ve learned though is that I had it backwards right from the start.

The reason the double-hops seemed to help has to do with the natural resonant frequency of the foot/ankle/leg system. Basically, there’s a natural rate of hopping, where the natural “springiness” of your feet and lower leg syncs up, minimizing the amount of energy it takes to hop up into the air again. Hopping at any other frequency is harder. The double-hop method lets you stick with the natural resonate frequency, while allowing you to swing the rope only half as fast.

Understanding that, it turns out to be very easy to fix: Just hop in place a few times, and you’ll quickly find that natural frequency. Then, just swing the jump rope at that rate.

Easy to fix, of course, doesn’t mean easy. Swinging the rope at twice the rate doesn’t double the intensity of the workout, but it does increase it significantly. I’ve had to back off on the length and number of my jump-roping intervals, although I’m already building back up.

My hope is that finding this resonate frequency, and getting myself synced back up with it, will help my running. (That is, I’m pretty sure that matching my foot turnover rate to the same resonate frequency will give me the most efficient running gait.)

We’ll see.

2020-04-16 08:32

This article makes a good point:

“Ultimately, we the public will decide when the economy reopens, not the government.”

If people decide not to fly, not to stay in hotels, not to eat at restaurants, and to wait and see how things work out before making major purchases, it doesn’t matter if the “stay-at-home” orders are lifted or not.

Source: It’s Ugly Out There | Tim Duy’s Fed Watch

Letter to Congressman Rodney Davis supporting the post office

I have written my congressman:

Dear Congressman Davis:

I am writing to urge you to support the United States Postal Service—both in general, and on an emergency basis.

The internet, email, and courier services all have their place, but the U.S. mail remains a critical service. It is used by many businesses and many individuals. Services only available from the post office (such as dated postmarks, and the presumption that something mailed has been delivered) are embedded into laws and common practices beyond counting.

On an emergency basis, the post office needs financial support similar to any business hard-hit by the pandemic.

On a longer-term basis, the post office needs relief from the onerous pension pre-funding rules imposed in 2006. (Or, if those rules are really a good idea, perhaps they should be extended to all businesses, and all local, state, and federal pensions.)

I remind you that the establishment of post offices is one of Congress’s enumerated powers, and urge you to work within Congress to ensure that the post office is preserved. Please let me know about the efforts you’re making.

Yours sincerely,

Philip M. Brewer

I wrote the letter, printed it out on paper, signed it, addressed an envelope, put a stamp on it, and dropped it in the outgoing mail. (I used t-rex stamps, which are really too good for Congressmen Davis, but I was trying to make a point.)

A month-ish of distancing

It’s a little hard for me to settle on a start date for my personal social distancing. The formal stay-at-home order from the governor didn’t go into effect until March 21st, but the last thing I did that was really inconstant with proper distancing was on March 12th when I attended an aikido class (you really can’t remain distant and practice aikido). So, I’m calling it a month-ish of distancing.

I think of myself as semi-retired (because I am still writing and was still teaching my taiji class), but as a practical matter, I’m really actually retired. I’ve been drawing my pension for something like 5 years now, and Jackie has started drawing her social security.

So our financial circumstances as far as income goes are pretty much just as they were. (It may be that I won’t get paid for the last session of teaching taiji, since I only taught two of the planned eight weeks, but the actual dollar amount in question is pretty small.)

I assume my stock investments got crushed in the early reaction to the pandemic and have since recovered some, but to be honest I’ve not paid much attention. I had lightened up on stocks a couple of times in the past couple of years, and am pretty comfortable with my asset allocation. (I actually checked with Wise Bread to see if they wanted me to pitch them an article on “Investing in Plague Time,” but they said they’d completely shut down commissioning articles due to how the pandemic was hitting their income. I’ll recast the article as a blog post and put it up here pretty soon.)

As far as spending goes, we’re spending quite a bit less. We’re still trying to support local businesses—we’ve been buying groceries during geezer hour at Schnucks, and we restocked our liquor cabinet at Friar Tuck’s, taking advantage of their curb-side pickup scheme—but I’ve stuck to my new policy of only buying prepared food or drinks from businesses that provide paid sick time to everyone who might come into contact with my food, and so far I haven’t heard of any local restaurants or bars that do that. (If you know of any, let me know!) The upshot is that 100% of the food we’ve eaten this month has been prepared by Jackie or by me, which means it’s been both delicious and healthy.

I don’t have many pictures of the great dishes that Jackie has cooked—most recently khema made with grass-fed beef and served with chapatis—and it seems that I failed to get a picture of the lingcod seasoned after the fashion of Kerala roadside chicken (garlic, ginger, fennel, garam masala, turmeric) that I fried in coconut oil in my big cast iron skillet. However, here’s a few recent dishes:

Besides all the great food, we’re also enjoying (perhaps a little too much) our daily cocktail hour—often on-line with my brother and our mom. The folks I meet for coffee on Tuesday morning have been keeping things going by doing that on-line as well.

I’ve been very pleased with my success at maintaining my workout regimen, despite the closure of the fitness room. I’ve been making use of my kettlebell and my jump rope. I’ve been getting my runs in. I’ve been using my new gymnastic rings:

I do my workouts outdoors to the greatest extent possible—runs around the neighborhood, setting the rings up in Winfield Village’s basketball court, jumping rope and swinging the kettlebell in our little patio. Our neighbors all seem to be pretty good about respecting proper distancing practices, so it’s working okay so far.

While I’m on the subject of exercise, I wanted to mention in passing this hilarious tweet:

Just to say that, although getting ripped is perhaps not in the cards, I’m having a great time making the attempt.

Finally, I’m meaning to get back to getting some writing done, and to that end I spent all morning tidying up my desk:

At this moment (a couple of hours later), it is still just about that tidy, and I’ve used it to write this blog post. This afternoon I’ll use it to write a letter to my congressman and senators, urging them to support the post office. And then, I’ll see if I can’t get to work on some fiction.