Free assessment for rotational athletes

Find where your swing, serve or strike is losing power

Five movement tests you can do at home with no equipment, and four quick questions. Watch the demo, try each test, score yourself. In about five minutes you get your Rotational Performance Index.

An athlete driving off one leg and rotating on a turf field
5
movement tests
4
quick questions
5 min
start to finish
Free
result on screen straight away

This is for you if…

  • You lose it when it counts

    Your swing, serve or strike feels strong in training but loses power, control or consistency in competition.

  • The energy doesn't transfer

    You feel a loss of connection when you rotate, as if the power from your legs never fully reaches your arms.

  • Your back or hips tire first

    Your lower back or hips are the first thing to fatigue in a match, a sign your rotational chain is compensating.

  • You coach or parent an athlete

    The skill is there, but the speed and power their training should deliver isn't showing up on the field or court.

  • Conditioning hasn't fixed it

    You've done plenty of conditioning, but nobody has trained the rotational chain that connects your feet to your hands.

What you'll find out

Real answers. No generic fitness advice.

  • Rotational weakness

    Where in your rotational chain (hips, core or the stabilisers down your side) force is leaking before it reaches your swing, serve or strike.

  • Rotational control

    Your control across five movement tests, from hip stability to the side chain to whole-body coordination, with your left side scored against your right.

  • Rotational focus

    Which gap to close first, so the work you do next goes where it changes your output the most.

Five tests, four questions, one clear answer

Built for tennis, golf, baseball, softball, soccer, pickleball and every sport where you rotate to produce power.

  1. Do the five movement tests

    Watch the demo, try the movement, and score yourself out of three. Unsure? Switch to the “Common mistakes” clip before you answer.

  2. Answer four quick questions

    Your sport, how you train, and where you feel it after a hard session.

  3. Get your RPI

    A score out of 100, colour-coded from red to green, with a map of your left side against your right.

The five tests

Each test has a short demo clip and a “Common mistakes” clip, so you know what a clean rep looks like before you score it. Four of them are scored on each side.

  1. Darren demonstrating the prone hip abduction

    Prone hip abduction

    Face down, turn the leg out and lift it away. Shows whether your hips hold still while the leg works.

  2. Darren demonstrating the rocking hollow

    Rocking hollow

    Rock on your back like the bottom of a bowl. Shows whether your midsection stays braced.

  3. Darren setting up the short lever Copenhagen

    Short lever Copenhagen

    A side plank with the top leg supported. Shows the inner-thigh and side chain that steady every rotation.

  4. Darren demonstrating windshield wipers

    Windshield wipers

    Lower straight legs from side to side with your shoulders flat. Shows how well you control rotation through the trunk.

  5. Darren demonstrating the retro backwards hop

    Retro backwards hop

    Hop backwards and land balanced. Shows how you control a change of direction.

Questions

Do I need any equipment?
No. A clear patch of floor is enough. A mat makes the floor tests more comfortable.
How long does it take?
About five minutes.
Is it free?
Yes. You enter your name and email at the end, and your result appears on screen straight away.
Should I film myself?
It helps. Prop your phone up, do the test, and watch it back before you score. It is harder than it looks.
I'm a parent or coach. Can I take it for my athlete?
Yes. Go through the tests with them and score what you see.

Ready to find out what's limiting your rotational output?

Pinpoint where your rotational power breaks down, in about five minutes.

Start my free assessment