--- title: Health & Fitness Blog - NASM | Jena Walther, MS description: For health and fitness topics, backed by the latest research in the field, browse our blog for industry-leading findings. ---   [![NASM](https://blog.nasm.org/hubfs/Nasm_December2018/images/logo186x62.png)](https://blog.nasm.org) - [NASM.org](https://www.nasm.org) - [Fitness](http://blog.nasm.org/tag/fitness) - [CPT](http://blog.nasm.org/tag/cpt) - [Nutrition](http://blog.nasm.org/tag/nutrition) - [CES](http://blog.nasm.org/tag/ces) - [Sports Performance](http://blog.nasm.org/tag/sports-performance) - [Workout Plans](http://blog.nasm.org/tag/workout-plans) - [Wellness](http://blog.nasm.org/tag/wellness) # Jena Walther, MS ### Recent Posts [![Hands holding blood drop in hands](https://blog.nasm.org/hs-fs/hubfs/Donating%20Blood%20and%20Exercise-What%20Athletes%20Should%20Know.jpg?width=723&name=Donating%20Blood%20and%20Exercise-What%20Athletes%20Should%20Know.jpg)](http://blog.nasm.org/fitness/donating-blood-and-exercise-what-athletes-should-know) [Sports Performance](http://blog.nasm.org/tag/sports-performance) ## [Donating Blood and Exercise: What Athletes Should Know](http://blog.nasm.org/fitness/donating-blood-and-exercise-what-athletes-should-know) [Jena Walther, MS](http://blog.nasm.org/author/jena-walther-ms) | February 6, 2016 Do you ever give blood? According to the Red Cross, every two seconds there’s an American in need of it, requiring roughly 41,000 donations per day. In the U.S., more than 100 million people are eligible to donate, although only about 9 million do so ... [Read More](http://blog.nasm.org/fitness/donating-blood-and-exercise-what-athletes-should-know) [![male running outside on a dirt trail](https://blog.nasm.org/hs-fs/hubfs/pes-3.jpg?width=723&name=pes-3.jpg)](http://blog.nasm.org/uncategorized/can-a-hypoxic-training-mask-improve-performance) [Sports Performance](http://blog.nasm.org/tag/sports-performance) ## [Can a Hypoxic Training Mask Improve Performance?](http://blog.nasm.org/uncategorized/can-a-hypoxic-training-mask-improve-performance) [Jena Walther, MS](http://blog.nasm.org/author/jena-walther-ms) | October 16, 2015 Don’t be afraid of that man wearing the mask on the treadmill next to you. Even though he looks like a cross between a burglar and Hannibal Lecter, he probably means you no harm. He’s wearing what’s known as an “altitude mask,” and despite your concerns, ... [Read More](http://blog.nasm.org/uncategorized/can-a-hypoxic-training-mask-improve-performance) [![female NASM trainer coaching male client on treadmill](https://blog.nasm.org/hs-fs/hubfs/senior-fitness.jpg?width=723&name=senior-fitness.jpg)](http://blog.nasm.org/uncategorized/are-older-adults-indifferent-scared-and-reluctant-to-exercise) [CPT](http://blog.nasm.org/tag/cpt) [Fitness](http://blog.nasm.org/tag/fitness) [Senior Fitness](http://blog.nasm.org/tag/senior-fitness) ## [Are Older Adults Indifferent, Scared, and Reluctant to Exercise?](http://blog.nasm.org/uncategorized/are-older-adults-indifferent-scared-and-reluctant-to-exercise) [Jena Walther, MS](http://blog.nasm.org/author/jena-walther-ms) | August 27, 2015 Exercise can bring numerous benefits to older adults, both physically and psychologically, so why aren’t they active enough? Sometimes the biggest challenges to training this group, or even getting them to attempt any exercise at all, are their perceived ... [Read More](http://blog.nasm.org/uncategorized/are-older-adults-indifferent-scared-and-reluctant-to-exercise) [![iron the micronutrient](https://blog.nasm.org/hs-fs/hubfs/blog-on-iron.jpg?width=723&name=blog-on-iron.jpg)](http://blog.nasm.org/nutrition/iron-an-essential-mineral-for-athletic-performance) [Sports Performance](http://blog.nasm.org/tag/sports-performance) [Nutrition](http://blog.nasm.org/tag/nutrition) ## [Iron: An Essential Mineral for Athletic Performance](http://blog.nasm.org/nutrition/iron-an-essential-mineral-for-athletic-performance) [Jena Walther, MS](http://blog.nasm.org/author/jena-walther-ms) | July 24, 2015 Trained athletes and clients alike are monitoring their intakes and percentages of critical fuels - carbohydrates, fats, and protein - but are potentially falling short on their micronutrient needs. These trace players in the diet can have a significant ... 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