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Is There An Ideal BMI for Performance?

Good morning and welcome to the Morning Chalk Up. Today’s edition was chalked up while watching this father and daughter duet of “You’ve Got a Friend in Me.”

What we’re reading with our first cup of coffee, a Morning Chalk Up original –> 9 scenes from Tropic Thunder that could have actually been about the CrossFit Open.

QUOTE OF THE DAY

“You think you can’t, until you can.” — Clifton Goins

CHALK UP IN 2 MINUTES

WHAT YOU NEED TO KNOW BEFORE YOU HIT THE BOX

Hey Demi Bagby, do you have what it takes to beat this Marine on the bar? Should we take this as a new movement hint for the 2017 CrossFIt Open? This mom decided to do her maternity photo shoot at a CrossFit box. Tennil Reed got engaged last night. Katrin Davidsdottir’s muscle-up work is looking extremely strong. The 2016 CrossFit Games behind the scenes is coming soon.

Upcoming: Faith Rx’d’s next Iron Sharpens Iron Camp is coming right before the CrossFit Open, Feb 10-12 in Sacramento, featuring Becky Conzelman, Guido Trinidad, Andrea Ager and Ben Alderman.

An Open for the Littlest Athletes — The Garage Games announced the first annual Junior Open 2017, a five week competition for youth ages 7 to 14. Like the CrossFit Open, workouts will be announced every Friday and athletes will have five days to log their scores. Here are the complete details and signup

WHAT WE’RE WATCHING

CrossFit HQ’s newest video, “Sober Second Change,” a story about Billy who endured years of physical abuse, eventually falling into drug and alcohol abuse. Billy found a second salvation with his new family at CrossFit Poipu.

ON THE RADIO

America’s favorite Olympic weightlifter, Mattie Rogers, sits down with Beyond the Barbell in Miami to talk about everything from CrossFit and Olympic weightlifting, to how she keeps from burning out and why you can’t PR every day.

CHALK UP READS

With only 24 hours in a day, why on earth do we spend close to an hour just looking at ourselves?

Yes, the average adult woman will spend 43.5 minutes looking at her reflection every day according to a study conducted by Betta Living. That’s a lot of time.

This study got me thinking, “What would happen if I took mirrors out of my life?” Not forever, but for a week. What would I learn about the importance of my own physical appearance? I work out to stay fit and healthy and of course to look good, so by taking away the ‘looking element’ would it change how I trained or how I felt as I went about my day?

“Is There an Ideal BMI for Performance?” by Beyond the WhiteboardBody Mass Index, or BMI, is an almost two hundred year old concept that roughly establishes a ratio between a person’s height and body weight. Historically considered an important health marker, current research raises questions about the efficacy of BMI as a health marker- most famously when pro boxing superstar Evander Holyfield was found to be technically “obese” according to BMI metrics. Most glaringly BMI focuses solely on scale weight, neglecting body composition- the amount of muscle vs. fat present in a body.

BMI by itself may not be a great predictor of health, but that’s not to say it’s altogether useless, it simply needs to be examined in relation to other metrics.  This article is not going to discuss the pros or cons of using BMI as a proxy for Body Fat percentage or health status. Instead, we’re interested in looking at how BMI relates to performance. Since BMI is just a ratio between weight and height for any given height, a higher BMI means a higher weight. Since we can’t do much to change our height, the practical variable of interest for us is weight.

CHALK UP AFFILIATES

CrossFit Sunnyside in New York launched a new kids program because parents at the gym kept asking for one.

FUN FACT: The winner of Wodapalooza’s Adaptive Standing RX division uses the strap off a razor scooter for a lot of the pulling movements in CrossFit.
Kids at Next Level Day Camp in Westchester, NY do CrossFit as part of their daily activities. The camp which was originally started so that “girls would have a chance to develop their self-esteem and confidence,” started one for boys last year.
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