Recoil Angular Range (Recoil AR) measures the angle of the shin between the moment of toe-off to the height of the rear kick of the foot. The higher the Recoil AR number, the more efficiently a runner can use their core muscles and lower leg muscles to swing their leg forward in the next phase of the stride.
Recoil AR is a unique Motion Performance Indicator (MPI), available only with LEOMO products. |
Summary
-
Recoil AR score indicates whether the lower leg is relaxed (not tense) by using the proper muscles.
-
Recoil AR will naturally increase with an increase in speed. If Recoil AR increases without an increase in speed, it could be a sign of inefficiency.
-
Recoil AR is a complementary function to Thigh Swing Speed of the opposite leg.
Why Recoil AR is important
- Recoil AR is important because it indicates inefficiency if it is high and lower speeds. It can be a limiting factor if a runner's Recoil AR is not increasing as speed increases.
-
A high Recoil AR creates a higher potential for increased Thigh Swing Speed.
About the value of Recoil AR
-
Recoil AR is measured in degrees.
-
LEOMO research data has shown recreational runners to have a Recoil AR of about 40 degrees. Many elite athletes can produce a Recoil AR up to 85 degrees.
- Recoil AR increases as an athlete's speed increases. If there is an increase in Recoil AR without an increase in speed, it will result in a higher metabolic cost that may not be sustainable.
-
Since the movement is estimated from the sensors in the shoe, the error may be large depending on how you run.
Angular ranges |
Class |
Visual Reference |
---|---|---|
– 40° |
Low | Shins are backward flowing |
40° – 50° |
Moderate | Able to see the soles of shoes from behind |
50° – 70° |
High | Being able to relax (it's hard to see the soles of your shoes) |
70° - 80° |
Exceptional (Mid distance runner) | Unable to see the soles of shoes from behind. |
80°+ |
Exceptional (Not good for Marathon runner) | Just enough to hit one's buttocks |
Sensors
-
Foot placement
-
Use sensor clip
-
Attach to shoes with shoelaces
-
Insert it from the heel to the toe (To prevent it from falling)
- If the sensor clip is worn close to the toes, it may hit the toes. It is recommended to mount the clip as close to the ankle as possible.
Real-time data & analysis
Recoil AR can be observed in real-time.
Coaches can access the scores in real-time with LEOMO LVS.
Related
Part of the Stride Cycle, together with Heel Pitch, Thigh Swing Speed, and Strike AR.
Comments
0 comments
Please sign in to leave a comment.