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Jun 5th, 2016

Category: Nutrition
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The Most Important Supplement for Athletes- Vitamin D

Referred to as the “sunshine vitamin”, Vitamin D is produced by the body after the skin is exposed to sunlight. Vitamin D deficiencies are very common, especially in indoor athletes that have limited sun exposure. One study showed that 3/4 of U.S. teens and adults are deficient in Vitamin D (1). The health implications of […]

Feb 9th, 2016

Category: Coaching
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Positive vs. Negative Start Research

  For hundreds of years athletes have been naturally using the negative step for improved acceleration. Traditionally, coaches teach that it’s a wasted step and will lead to slower acceleration. For such a highly debated topic the research is lacking. Decisions on positive vs negative step have been strictly opinion based. We have been progressing with […]

Dec 17th, 2015

Category: Uncategorized
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Orange County Science Based Vertical Jump Training

We’re excited to announce that PJF Performance now has openings for Southern California volleyball players looking to improve their vertical jump and explosiveness. For volleyball clubs and players who want to take the guess work out of their vertical jump training, please contact      

Nov 24th, 2015

Category: Coaching
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5 In-Season Training Tips

In-Season training is the most overlooked phase of the training year. Too many players take 2 steps forward in the off-season and 1 step back during season. For long term athletic development, players need to learn how to train In-Season. In the video below I give some tips that help our athletes stay explosive and […]