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AI Ski Technique Analysis
By Henrik Georg Lindhagen, last updated: 25.06.2026
FF Rollerskis’ AI-powered ski technique video analysis tool gives you objective, frame-by-frame biomechanical feedback on your cross-country skiing or roller skiing technique — within 60 seconds after uploading your video.
The tool is developed by FF Rollerskis AS, a Norwegian FIS-approved roller ski manufacturer, in collaboration with certified cross-country ski coaches. It gives coaches and athletes around the world access to data-driven technique assessment inspired by World Cup-level performance analysis.
Upload your video for free and Analysis Contact FF Rollerskis
Why Coaches Around the World Choose FF AI Video Analysis
Analysis in 60 Seconds
Upload video from a mobile phone, GoPro or drone and receive a complete report with visual markers in less than 60 seconds.
- No software installation.
- No manual frame-by-frame review.
- Fast, objective and easy to share with athletes.
Objective Biomechanical Data
Remove guesswork from technique assessment. Get precise measurements of joint angles, push-off timing, balance, asymmetry and movement patterns. Everything is presented with clear visual markers directly on the video.
AI Models Adapted to Each Technique
The AI uses dedicated biomechanical models for classic diagonal stride, double poling, skating V1, skating V2 and V2 alternate / offset. This is not a generic sports analysis tool — it is built specifically for cross-country skiing and roller skiing.
Personalized Corrective Drills
Each report includes specific drills based on the technical errors detected in the athlete. The report can be sent directly to the athlete or used by the coach as part of a training plan.
Comparison With World Cup Level
Compare the athlete’s joint positions and movement timing with reference values from elite skiing. This makes improvement goals concrete, measurable and easy to understand. Read more about the technology behind FF Rollerskis.
“This tool saves me 70–80% of the time I previously spent on video analysis. Now all my athletes can receive top-level follow-up every week.”— Club Coach, Central Europe
What Does AI Ski Technique Analysis Measure?
FF’s AI video analysis uses computer vision trained specifically on biomechanics in cross-country skiing and roller skiing. Each measurement is calibrated against technical norms from elite skiing and roller skiing.
Classic Diagonal Stride Analysis
The AI analysis measures push-off timing in relation to the body’s center of mass, pole plant angle, arm swing and hip extension during the push-off phase.
Common technical errors detected include:
- Early weight transfer
- Insufficient push-off
- Limited hip engagement
- Lack of pressure through the full movement
Example AI Result — Classic Diagonal Stride
- Push-off phase starts 0.08 seconds too early compared with the optimal body-center-of-mass position.
- Hip extension during push-off is 168° — target: 175–180°.
- Left arm pull ends 12° before full range of motion.
- Recommended drill: Single-leg balance push-off with pole touch.
Double Poling Analysis
Double poling is the most power-dependent technique in cross-country skiing. The AI video analysis evaluates pole plant angle, elbow position through the compression phase, upper-body rotation, finish position, wrist angle and elbow angle — all measured frame by frame.
Athletes who plant the poles too late or finish the pull too early get this quantified immediately.
Example AI Result — Double Poling
- Pole plant angle: 71° — target: 75–80°.
- Compression phase duration: 0.31 seconds — slightly too short.
- Upper-body angle in compression: 42° — target: 40–45°.
- Core activation score: 7.2/10.
- Main improvement area: Plant the pole 0.05 seconds earlier and 4° more vertically.
Skating Technique Analysis — V1, V2 and V2 Alternate
Skating on roller skis requires complex and asymmetrical coordination. The AI engine analyzes push angle, glide time per push-off, coordination between arms and legs, lateral balance and asymmetry between the right and left side.
A common error among recreational skiers is asymmetrical push-off — one side may produce 15–25% more force than the other. This creates energy loss and may, over time, increase load on the knees. The AI flags and quantifies this asymmetry in the report.
Example AI Result — V2 Skating
- Right push duration: 0.41 sec.
- Left push duration: 0.35 sec.
- Asymmetry: 17%.
- Right pole plant occurs 0.04 seconds too late.
- Balance in glide phase: 6.4/10 — target: 8+.
- Recommended drill: 30 seconds of single-leg skate glide with focus on left-side extension.
Built to Strengthen the Coach — Not Replace the Coach
FF AI video analysis is built to support the coach, not replace the human coaching role. All AI feedback is presented as objective data: angles, timing, asymmetry, balance and technical deviations.
Interpretation, training load, motivation, overall understanding and injury-risk assessment remain the coach’s responsibility.
Recommended Workflow
- The AI performs the technical measurement.
- It generates a report with marked video.
- The coach reviews the most important findings.
- The coach selects the 2–3 most important corrections for the athlete’s current training phase.
- The coach adds personal context before the report is sent to the athlete.
This normally takes 5–10 minutes per athlete, instead of 45–90 minutes of manual frame-by-frame video analysis.
All recommendations are based on biomechanical norms from elite skiing. The AI reports are always advisory — the coach’s relationship, experience and professional judgment remain most important.
Camera Guide for the Best Analysis Result
To get the highest possible accuracy from the AI report, follow these guidelines. You can also contact FF Rollerskis if you need help preparing video material for analysis.
Side View
Best for most technical analyses. Place the camera 5–8 meters away, at hip height, with the full body visible in the frame. Film at least 4–6 complete cycles or steps.
Front View
Best for detecting asymmetry, lateral balance and differences between the right and left side. Position the camera approximately 10 meters in front of the athlete in the direction of movement.
Drone / Overhead View
Best for double-poling rhythm, pole symmetry and rhythm in the upper body and arms. The drone should be 8–12 meters above the athlete, directly over the line of movement and stable.
Video Length and Technical Quality
Optimal video length is 60–120 seconds. Film in 1080p, use 60 fps, ensure good lighting and keep the full body visible in the frame.
Natural daylight — preferably overcast — usually gives the best result. Clothing with clear contrast helps the AI distinguish body parts accurately.
Preparing the Athlete Before Filming
For the most representative analysis, the technique should be filmed in a realistic training or competition situation — not in an artificial “show me your technique” movement.
We recommend 3–5 minutes of warm-up before recording and at least five complete technical cycles per submission.
Label the clip with technique, date, athlete name, surface conditions — snow, asphalt or roller skiing — and any relevant conditions. This makes reports easy to find throughout the season.
About FF Rollerskis — FIS-Approved Norwegian Manufacturer
FF Rollerskis AS is a Norwegian manufacturer of FIS-approved roller skis. The company has delivered equipment to FIS World Cup events for six consecutive seasons.
This AI service for ski technique video analysis is developed internally and validated against biomechanical data from elite skiing, in collaboration with certified cross-country ski coaches.
Our international coaching tools are available globally on ffskis.com. Our Norwegian product range and Norwegian-language coaching services are available on ffskis.no.
Read more about founder Henrik Lindhagen and the FF Rollerskis ambassadors.
How to Interpret the AI Ski Technique Report
After uploading your video, you receive a structured report with three main levels:
- Biomechanical scores
- Technical error flags
- Personalized corrective drill recommendations
When you understand each level, it becomes easier for you and your coach to turn data into concrete improvement on skis.
Overview of the Biomechanical Score
Each technique receives an overall score from 0–100, based on joint position, rhythm and tempo, stability, timing in force transfer and technical efficiency.
- Score above 75: The technique is race-ready.
- Score 50–74: The athlete should work on targeted technique drills.
- Score below 50: Fundamental technique work is needed.
Technical Error Flags
The error module identifies up to 12 common technical errors per technique, such as late pole plant, asymmetrical push-off, lack of hip engagement, too short arm pull, poor balance in the glide phase and uneven rhythm.
Each finding includes a timestamp, and the errors are ranked according to their impact on performance and efficiency.
Personalized Drill Recommendations
Each report ends with three to five prioritized drills selected based on the athlete’s specific technical error profile.
Coaches can export the full AI report as a PDF. After the athlete has completed the recommended drills, a new video can be uploaded — and progress can be tracked over time.
Frequently Asked Questions
Which Ski Techniques Can the AI Analyze?
The AI video analysis covers classic double poling, skating / freestyle, V1, V2, V2 alternate and classic diagonal stride. You select the technique when uploading the video, so the correct biomechanical model is used.
How Long Does the AI Analysis Take?
Most reports are delivered within 60 seconds after upload. Complex or longer videos may take up to 5 minutes. You receive the report by email as soon as it is ready.
Which Video Formats and File Sizes Are Supported?
The following formats are supported: MP4, MOV and WebM. Maximum file size is 150 MB. For best results, film in 1080p, use 60 fps and ensure good natural light. GoPro video filmed from the side works well.
Can I Use Drone Video?
Yes. Drone video should have at least 4K resolution for accurate joint tracking. Position the drone 8–12 meters above the athlete, directly over the line of movement. Drone angle is especially useful for analyzing double-poling rhythm and pole symmetry.
Is the AI Analysis GDPR-Compliant?
Yes. Uploaded videos are processed securely and deleted from our servers within 30 days. We do not store personal data beyond what is necessary to deliver the analysis report. Full information is available in our Privacy Policy.
Do I Need Coaching Experience to Use the AI Analysis?
No. The platform is built for self-coached athletes, recreational skiers, club coaches, national-team and elite environments, and performance staff.
The report uses simple language alongside technical measurements, so everyone can understand the findings.
Which Camera Angle Works Best?
For the most accurate analysis, film from the side at hip height. The full body must be visible throughout the movement.
For double poling and diagonal stride, a 45-degree rear-side angle can also work well. Use a tripod or stable mount, 60 fps or higher and good natural light.
Can I Compare Multiple AI Reports Over Time?
Yes. The platform stores previous reports in your dashboard. You can compare scores side by side across sessions. Progress graphs show changes in biomechanical score for each technique category throughout the training period.
How Does the AI Coach on ffskis.com Differ From ffskis.no?
ffskis.com is FF Rollerskis’ international platform for AI ski technique video analysis, built for coaches and athletes around the world.
ffskis.no is our Norwegian platform with Norwegian language, local shopping, Norwegian coaching resources, NOK pricing and a Norwegian customer journey.
The AI analysis tool on ffskis.com is developed for the international coaching community.
Questions About Roller Ski Choice, Safety or Maintenance?
Do you have questions about choosing roller skis, roller ski safety or roller ski maintenance? Visit our guide pages or contact us directly.