Deep Technical Analysis

How Video Coach Works

AI biomechanical analysis. 50+ evaluation criteria. 7 quality levels. This is how Video Coach analyzes your technique.

Multi-Level Evaluation System

Video Coach doesn’t just count reps. It evaluates the QUALITY of every rep across multiple biomechanical dimensions.

526

Detectable Exercises

From squats to muscle-ups, weightlifting to gymnastics

50+

Biomechanical Criteria

For every exercise in the catalog

12

Biomechanical Categories

From movement control to hip mechanics

7

Quality Levels

0-100 score classified in 7 granular categories

What Does Video Coach Evaluate on Every Rep?

Each rep analysis goes through 4 phases: Validation → Quality → Error Detection → Final Output.

Validation

Is it a valid rep according to the standards of the exercise?

  • ✓ Minimum depth/ROM reached
  • ✓ Full extension achieved
  • ✓ Correct setup
  • ✓ No dangerous compensations
  • ✓ Movement completed

What do you get?

Valid / Invalid / Attempt

Quality Evaluation

If it's valid, how good was the execution?

  • ROM/depth reached
  • Tempo and movement control
  • Joint tracking (knees, elbows, hips)
  • Specific joint angles
  • Stability and balance
  • Spinal posture
  • Body segment positioning
  • … 28-30 more aspects

What do you get?

0-100 Score

Error Detection

Which incorrect patterns were detected?

  • Knee valgus (knee cave)
  • Lumbar hyperextension
  • Loss of neutral posture
  • Unilateral compensations
  • Dangerous movements
  • Incorrect biomechanical patterns

What do you get?

List of detected errors

Final Output

The full analysis you see in the app

  • 0-100 Score: numerical rating
  • Classification: across 7 levels (Excellent → Unsafe)
  • Strengths: what you did well
  • Areas to Improve: what to work on specifically
  • Phase Feedback: Setup, Pull, Lockout (when it applies)

What do you get?

Full report in the app

What does this mean for you? No error slips through. You’ll always know exactly what went well, what failed, and what to work on in the next set.

7 Granular Quality Levels

Video Coach isn’t binary (valid/invalid). Every rep gets a 0-100 score classified in 7 quality levels, with specific feedback for each level.

90-100

Excellent

Near-perfect execution. Exemplary form across every aspect.

"Optimal depth, flawless knee tracking, neutral spinal posture maintained throughout the rep."

80-89

Advanced

Solid technique with minor limitations.

"Good overall control. To improve: concentric speed slightly inconsistent on the last 2 reps."

70-79

Solid

Basic pattern achieved with some limitations.

"Acceptable depth, but 5-10cm short of full range. Work on ankle mobility and hip flexibility."

60-69

Functional

Noticeable limitations but recognizable movement.

"Neutral spine maintained, but compensation on the right knee. Focus on unilateral stability and glute medius activation."

50-59

Developing

Significant deficiencies that need work.

"Incorrect setup: hips too high in the starting position. Review the starting position tutorial before continuing."

30-49

Invalid

Does not meet minimum standards.

"Insufficient depth (20cm above parallel). Rep does not count for your WOD. Drop the weight and work on full ROM."

0-29

Unsafe/Dangerous

The execution presents safety risks.

"⚠️ ALERT: Severe lumbar hyperextension under load. Stop the exercise immediately and consult a certified coach."

Why does this matter? It’s not just valid or invalid. You know if your rep was 85/100 or 92/100, and exactly what you’re missing to reach the next level. Measurable progression, not guessing.

12 Biomechanical Dimensions

Every rep is evaluated across 12 biomechanical categories. Holistic analysis, not just depth or extension.

01

Movement Control

Smoothness and control of the movement. Is it fluid, or are there jerks? Full control, or loss of stability?

What it evaluates:

  • Consistent speed
  • No jerky movements
  • Control in the eccentric phase
02

Position Quality

Quality of setup, intermediate and final positions. Correct setup? Full lockout?

What it evaluates:

  • Optimal setup
  • Correct intermediate positions
  • Full lockout
03

Tempo/Speed

Execution speed and timing. Right tempo for the exercise? Explosive concentric phase?

What it evaluates:

  • Appropriate speed
  • Eccentric/concentric timing
  • No unnecessary pauses
04

Joint Tracking

Joint trajectories (knee, elbow, shoulder, hip). Correct tracking? Lateral compensations?

What it evaluates:

  • Knee over the foot
  • Elbow in line with shoulder
  • No lateral deviations
05

Extension/Flexion

Range of extension/flexion. Full lockout? Complete hip extension? Adequate elbow flexion?

What it evaluates:

  • Full hip extension
  • Knee lockout
  • Full elbow flexion
06

Stability/Balance

Stability and balance throughout the movement. Stable center of mass? Controlled balance?

What it evaluates:

  • No wobbles
  • Center of mass over base
  • Bilateral balance
07

Hip Mechanics

Hip hinge mechanics. Correct glute activation? Full hip extension?

What it evaluates:

  • Proper hip hinge
  • Glute activation
  • Full extension
08

Joint Angles

Specific joint angles (45°, 90°, etc.). Correct knee angle in the squat? 90° in the press?

What it evaluates:

  • Knee angle in the squat
  • Elbow angle in the press
  • Ankle angle in the squat
09

Posture/Alignment

Posture and spinal alignment. Neutral spine? Correct torso position? No lumbar rounding?

What it evaluates:

  • Neutral spine
  • No lumbar flexion
  • Upright torso (when it applies)
10

ROM/Depth

Depth and range of motion. Squat to parallel or below? Full ROM in pull-ups?

What it evaluates:

  • Depth at parallel or below
  • Full ROM in every phase
  • No shortened range
11

Timing/Coordination

Timing and coordination between segments. Arm and leg timing in the clean? Coordination in the snatch?

What it evaluates:

  • Arm-leg coordination
  • Pull timing
  • Phase synchronization
12

Scapular Control

Scapular control (push/pull exercises). Scapular retraction? Shoulder stability?

What it evaluates:

  • Scapular retraction
  • Shoulder stability
  • No excessive elevation

Why 12 dimensions? Because technique isn’t just depth. It’s stability, posture, timing, joint tracking. Holistic analysis, like having a coach watching every angle at the same time.

And All of This for 500+ Exercises

From basic squats to complex muscle-ups, from deadlifts to handstand push-ups. If you do it in the gym, Video Coach probably recognizes it.

Weightlifting

50+

  • Snatch (power, full, hang, blocks)
  • Clean & Jerk (all variants)
  • Front Squat, Back Squat, Overhead Squat

Powerlifting

30+

  • Deadlift (conventional, sumo)
  • Bench Press (variants)
  • Squat (low bar, high bar)

Gymnastics

80+

  • Muscle-ups (bar, ring)
  • Pull-ups, Chest-to-bar, Toes-to-bar
  • Handstand Push-ups, Dips

Functional Movements

150+

  • Thrusters, Wall Balls
  • Box Jumps, Burpees
  • Rowing, Assault Bike

Accessories

200+

  • Curls, Extensions, Raises
  • Lunges, Step-ups
  • Core work, Planks

Your exercise isn't on the list?

Request to add it

Answers in depth

Technical Questions

The technical questions we get most often about how Video Coach works.

Because real fitness isn’t binary. The 7 levels let you see where you are and understand exactly where you are in your progression. When you’re learning a new skill (pull-ups, handstand push-ups, muscle-ups), you need different feedback than when you already own it. These levels help you understand when you’ve moved past a movement and it’s time to polish it or move on to the next one. It’s not just about measuring technique, it’s about mapping your path of progression with clarity.
An 85 (Very Good) means solid technique with minor limitations. For reference: 90-100 is near-perfect execution, 70-79 is a basic pattern achieved with clear areas to improve, and below 60 needs immediate work. Your target depends on your context: a beginner celebrates a 75, a competitor is chasing 90+ consistently.
Video Coach gives feedback at several levels: it first identifies overall patterns (strengths and areas to improve across the whole set), and if you want more depth, you can dig into the individual rep analyses for specific details. Always start with whatever the analysis flags as critical (errors that could cause injury), then work on performance limitations, and finally refine technical details.
Both. Video Coach identifies the specific error (e.g. ‘insufficient depth, 5cm above parallel’) and gives actionable advice on how to improve on that specific movement (e.g. ‘work on ankle mobility and hip flexibility’). Not just diagnosis, also an improvement guide. You know exactly what to work on in your next session.
Video Coach is optimized for lateral, frontal and diagonal angles, which are the most common ones. We recommend lateral for squats/deadlifts, frontal for press/pull-ups, and diagonal for unilateral exercises. The app guides you on the optimal positioning based on the exercise you pick.
Yes, it can get things wrong occasionally, like any AI. What matters: the value is in the aggregate pattern over time, not in a single isolated analysis. Use Video Coach to identify consistent trends in your technique, and always double-check with a certified coach before making important changes on heavy loads or complex movements.
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