Thigh Strike AR (Thigh SAR)

Thigh Strike AR (Thigh SAR) is a measure of how well you pull your thighs back when you land, and can be used in combination with StrikeAR to evaluate your running characteristics, especially whether you land close to your center of gravity (if you can pull back, you are landing closer).

Thigh SAR is a unique Motion Performance Indicator (MPI), available only with LEOMO products.

Summary

• It is the angle of how much you are pulling your thigh back before the moment of landing.

• Strike AR (SAR) uses the Foot sensor to evaluate similar movements from the feet down to the knees, but Thigh SAR evaluates the movement of the thighs.

• If the value is large, you are landing with your thighs pulled back more, which means that you are able to both "thigh up" and "pull back". If the value is small, the run is more compact and the landing position may be further forward no matter how large the SAR is.

Why Thigh SAR is important

Thigh SAR is difficult to understand at first glance, because SAR is the range of motion from the knee down, while Thigh SAR is the range of motion of the thigh before landing. When running, the leg is swung like a whip through two joints, the hip and the knee, and by looking at the range of motion of these two joints, the pre-landing movement can be analyzed in more detail.

Thigh SAR and SAR are both MPIs used to evaluate the swing back of the foot before landing, but what is the benefit of a large swing back? It means that you can bring your landing point closer to your body's center of gravity.

If you can "bring your landing point directly under the center of your body," you will hardly brake when you land, and you will be able to land very efficiently.
However, in reality, you need to be on the ground for a very short period of time to absorb the impact of landing, and for this reason, it is impossible to land "right under the center of your body," and in fact, you need to land slightly forward.
There are many disadvantages to landing further forward than required, such as greater braking and longer ground contact time, which prevents you from increasing your pitch.

About the value of Thigh SAR

• Although Thigh SAR can determine the swing back of the foot by itself, it can be combined with SAR to provide a more accurate analysis.

• Even if Thigh SAR is small, SAR can be large (for example, Thigh SAR is 25° and SAR is 12°). （In such a case, it may seem that the swing back is not enough based on Thigh SAR, but since the SAR makes up for it, the landing point will be close enough to the body's center of gravity.

Thigh SAR	Level	Visual Reference
~ 20°	Bad	No swing back
20 - 25°	Low	Small swing back
25 - 35°	Moderate	Well swing back
35° ~	High	Widely swing back

Combination with SAR
*COG = Center of Gravity

		Thigh SAR
		~ 20°	20 - 25	25-35	35°~
SAR	0 - 3°	Not landing close to COG	Not landing close to COG	Slightly away from COG	Landing close to COG
	4 - 7°	Not landing close to COG	Not landing close to COG	Landing close to COG	Landing close to COG
	8 - 10°	Not landing close to COG	Slightly away from COG	Landing close to COG	Landing close to COG
	10° ~	Slightly away from COG	Landing close to COG	Landing close to COG	Landing close to COG

 

Sensors

• Thigh placement

• Use Adhesive tape

• Attach to the front of the thigh. No sides.

• Please put it on straight so that the LEOMO logo will be at the bottom when you stand up

• For best results, place the sensor at least 10 cm from the knee or the hip.

Real-time data & analysis

Thigh SAR 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: Strike AR, Heel Pitch, and Recoil AR.