Wear and tear from repetitive movements

I noticed something cool at my gym (Custom Strength) this morning. Take a look at this photo:

Shawshank redemption rope?
Shawshank redemption rope?

What you’re looking at is the anchor point for the battling ropes that we use for conditioning. If you’re not sure what that means, take a look at this video:

I love it as a conditioning exercise. That’s not quite accurate. I love it as a conditioning exercise for my clients. ;)

So back to that picture above. Take a look at the concrete around the attachment point. You can see a deep groove in the concrete at the bottom, and a shallower groove to the right. This is damage to the concrete from the ropes hitting it. The deeper groove at the bottom was made between March 2014 and Dec 2015, and the shallower groove on the right is from the position the ropes get used in since we changed the gym layout over Christmas – so not quite 4 months of use. A piece of rope being moved up and down by humans can make a hole in concrete, given enough repetitions. That’s pretty cool!

Here’s a photo of our other rope.

Rock dust for the yard
Rock dust for the yard

Note the concrete dust? The white ropes (previous image) haven’t been used since the cleaners were in on Sunday, but the black ones (this image) have been used by about 10 people. That strikes me as an impressive pile of concrete dust from 10 people, each using the ropes for about a minute. 10 minutes of human-powered rope movement left a pile of concrete dust and thus presumably a bit deeper of a hole than was there last week.

In addition to how cool and remarkable this is, it makes me think about repetitive movements we do with our body. How many steps in a marathon? How many swings in a tennis tournament? How many strokes in a swim meet? All the more reason to spend a little time getting stronger and moving better, to give your body some support for all those repetitions.

Elsbeth Vaino, B.Sc., CSCS, is a personal trainer who loves introducing athletes to smart training as a means for improved sports performance and enjoyment with a side benefit of reduced injury risk.

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