If you've coached cricket for any length of time, you've said something like: "Your front knee is collapsing" or "You're not getting your weight through at impact." You could see it. But you couldn't measure it, prove it changed, or explain exactly why it was happening.
Cricket biomechanics is the science that gives numbers to what coaches have always seen intuitively — turning observations into measurements, and measurements into a system for improving performance and preventing injury.
The key insight
Biomechanics does not replace coaching. It gives coaching a measurement instrument. Your eye sees the problem. Biomechanics tells you exactly what the measurement is, whether it changed, and which phase is the root cause.
The four bowling phases
CricMotion analyses the bowling action across four distinct phases, each scored 0–100:
- Run-up: Posture at gather, head steadiness, non-bowling arm carriage. Most bowlers' run-ups are strong — problems here are rare but significant.
- Impulse stride: The bound before front-foot contact. Jump height, lead-arm reach, arm and knee timing. Where mechanical inefficiencies first appear.
- Delivery stride: The root cause phase in most analyses. Front-foot contact, knee angles, bracing time, trunk position. If there's a problem, it's most likely here.
- Follow-through: Arm deceleration, trunk continuation, balance at finish. Flags here are almost always downstream consequences — fix the delivery stride and follow-through often resolves.
The four batting phases
Batting biomechanics is equally structured — yet almost entirely absent from cricket coaching technology.
- Stance: Width, alignment, pelvis position, front-knee flex, back-elbow angle, weight distribution. A poor stance cascades problems through every phase that follows.
- Backswing: Trigger step, backlift height, bat speed at apex, shoulder load. Problems here affect timing, power, and injury risk.
- Downswing: The root cause phase for batting. Front-foot stride length, knee flex at impact, head position. Explains more batting problems than any other phase.
- Follow-through: Bat finish height, trunk rotation, front-knee drive. Downstream of downswing — don't drill these directly if the root cause is elsewhere.
The Bowler's Triangle and Batter's Diamond
CricMotion organises findings into two frameworks that map measurements to what matters in cricket:
The Bowler's Triangle has three sides: Pace (front knee, bracing time, hip-shoulder separation), Line & Length (head steadiness, release point consistency, arm path), and Longevity (lumbar stress, shoulder overuse, follow-through mechanics).
The Batter's Diamond has four sides: Set-up (stance quality), Power (backlift height + stride length — the two strongest predictors of bat-speed), Control (head position, ball-tracking), and Longevity (overuse injury patterns).
What AI makes possible
Traditional biomechanics analysis required a lab, high-speed cameras, reflective markers, and a specialist analyst — ₹2–5 lakh per session. CricMotion runs the same analysis from one phone video — any phone, any cricket ground. The access gap between elite and grassroots cricket is now measured in the cost of a phone video upload.
"Most problems in young fast bowlers come down to three things: the rear knee at release, the bracing time, and the lead arm at the bound. These are invisible to the naked eye at bowling speed. The numbers tell you what your eye missed. — Arjun Sir"