• Inspection Method : Testing Carried out on 12 People
  • Inspection of Change in Power Released by Left and Right Legs

Inspection of Change in Power
Released by Left and Right Legs

1

Inspection Method: Testing Carried out on 12 People

Temporary load and lactic acid levels were tested in 12 people on fixed rollers with varying endurance training abilities (LT power ranging between low, medium and high), competition experience (ranging from beginners, people with less than one year's experience, to people with more than three years' experience), and competition level (general, school competition, and national representative level)

Inspection Method

1) Load was increased by 40w at a time and then maintained for 3 minutes. This was repeated until exhaustion.
2) Maintaining a cadence of between 87 and 93 RPM.
3) Measuring each subject's lactate threshold ("LT"), the intensity at which exercise becomes hard.

Warm-up
Maintained for
3 minutes
Increasing power level
by 40w at a time
Ending when power cannot
be increased further
Power HR Cadence

What is lactate threshold ("LT")?

The level of intensity where continued exercise begins to feel hard.

The approximate intensity where changes in blood lactic acid concentration become large is the LT (in this case, baseline +1 mmol/l concentration is defined as the LT.) By measuring this, an athlete's endurance ability can be measured in watts. LT is the most fundamental indicator of endurance potential.

LT between 270W and 290W
Felt as "fairly hard" or "hard"

When the load is low, the power from the oxidative metabolism is central.

As the load increases, this is supplemented by the secondary engine, glycosis. This leads to increased lactic acid production and an increase in lactic acid concentration in the blood.

1mmol/l
LT Power Value

How do you determine the LT Power Value?

Rating of Perceived Exertion ("RPE")

During exercise, the intensity felt by the participant is expressed by a number between 13 and 15. This often corresponds to the LT.
Using RPE, the LT can be easily determined.

  20  
19 Extremely hard
18  
17 Very hard
16  
LT intensities from "fairly hard" to "hard" 15 Hard
14  
13 Fairly hard
  12  
11 Light
10  
9 Very light
8  
7 Extremely light
6  
1

Inspection of Change in Power Released by Left and Right Legs

Changes in Left/Right Power Rate
Associated with Load Growth

Result 1

Most athletes experience left/right power rates within ±10% under growing loads.

Athlete A
Left/Right Power Rate ±10%
Left/Right Power Rate
LT Power Value
Athlete B
Left/Right Power Rate ±0%
Left/Right Power Rate
LT Power Value

Result 2

In some cases, athletes become dependent on one leg under growing loads.

Athlete C
Towards One Leg
Left/Right Power Rate
LT Power Value
Athlete D
Towards One Leg
Left/Right Power Rate
LT Power Value

*Display graph is the original analysis data from this study. The Cyclo-Sphere screen is different.
Left/right power balance rates are original data from this verification study.

Result

  1. Most athletes experience left/right balance rates within ±10% under growing loads.
  2. In some cases, athletes become dependent on one leg under growing loads.
  3. Leg techniques, such as applying more force from the more powerful leg, or achieving power from the less fatigued leg, differ from athlete to athlete. However, as the LT power value is approached (exertion is perceived) the left/right balance rate often nears a fixed value.
  4. In some cases, the left/right rate can be corrected while maintaining the same position.
    → If left/right rate cannot be held within ±10%, correction is recommended.
Conclusion

Summary of New Analysis Method Research and Training Method Verification Trials 1-3

Discover new analysis methods using the below
pedaling monitor functions

1. Power transmission efficiency can be measured
2. Torque can be measured at 12 points per rotation
3. Left/right power balance values can be independently measured

In order for athletes to achieve even greater power,
we are optimizing the following elements
in different combinations of orders and contribution rates.

  • 1. Pedaling Efficiency

    Increase pedaling efficiency in order to achieve even greater power values without waste.

  • 2. Torque Distribution

    Torque distribution at 60°-90°-120° differs from athlete to athlete

  • 3. Left/Right Pedal Power Balance Rate

    Further utilize the more powerful leg Achieve power from the less fatigued leg

Various techniques for achieving greater power differ from athlete to athlete