Coach Back

About Coach Back

Daniel Back is the founder of Jump Science.

How to Jump Higher

There’s a lot of information on this site and in the Jump Science posts on facebook and instagram. When I write, I try to give people actionable information. I hope […]

The Science of Sports Training

There is a sea of athletic development information on the internet nowadays. The overall quality has improved as more educated people have built websites and social media presence to combat […]

Eating More for Speed Performance

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Achilles Strength (Bosch is wrong)

In a popular athletic development book, the author, Frans Bosch, cites force measurements in the achilles tendon of 3-6 x body weight (BW) in sprinting and 8-10 x BW in […]

Long Jump Case Study

In the athletic development field coaches often share general philosophies, models, ideas, etc. Someone might talk about things they consider when making decisions, but not share any actual data or […]

Dan Pfaff is wrong?

A quote from Dan Pfaff recently made the rounds through the athletic development community. Pfaff is obviously a great coach, and I do not intend to criticize him or judge […]

Recovery During a Hard Season

QUESTION: “hey I need some advice… So I’m homeschooled and my high school team plays a lot of games … we often play back to backs and tournaments we can […]

Biarticulate Muscles and Synergy

When looking at muscle function, people often look at one joint, consider the muscles that act on that joint, and identify the muscles that perform opposite actions as antagonists to […]

Jumper’s Knee

The stretches and exercises he shows to avoid and/or recover from the jumper’s knee are the best. I had a really bad jumper’s knee, but 1 month later I didn’t […]

Squat Depth

In the discussion on transfer of training, squat depth is a hotly contested issue with many opinions clouding the view. On one side many people testify to superior strength and […]