Fomin RMasakov L, Vesterinen V, Nummela A.

18th Annual Congress of ECSSBarcelona - June 29th, 2013

EFFECT OF ALACTIC AND LACTIC TRAINING ON BRAIN DC POTENTIAL IN RECREATIONAL RUNNERS

Research Institute for Olimpic SportsJyväskylä, FIN

Introduction

"The great aim of education is not knowledge but action."  

H. Spencer

DC Potential Definition

DC potential is a brain biopotential within a frequency range that is lower than the EEG range (0 through 0.5 Hz).

History: 70+ years.

Genesis: metabolic, humoral and neural.

Physiology: Slow Regulatory System of the Brain

Why DC Potential is useful for monitoring training responses?

DC potential is an integrated indicator/marker of • Readiness of an organism• Functional State of CNS• Wakefulness level• Activation level• Tonus of CNS• Functionality level

It allows out us to understand • Stress level and

resistance• Adaptational changes• Compensation

abilities• Cost of adaptation• Adaptability

DC Potential in Peer Review Literature

•Toxicology•Anaesthesiology•Gastroenterology•Traumatology•Neurosurgery•Epilepsy•Urology•Cardiology•Endocrinology•Psychopathology•Narcology etc

Medicine

•Physiology of wakefulness and sleep

•Neurophysiology •Autonomic nervous system •Homeostasis•Cognitive neurobiology and neuropsychology

•Developmental physiology •Brain energy metabolism •Physiology of labour etc

Physiology

•ONLY IN RUSSIAN LANGUAGE

•Track & field•Marathon•Fencing•Boxing•Wrestling •Gymnastics

Sports

Goal

The research aim is to study changes in DC Potential in response to different training loads.

Protocol

Running Alactic / Treadmill Lactic / Track

Duration, min 30 60Sessions 30x10s each 4x300m eachRest between sessions

50 sec 5 min

Speed & Grade

Avg. speed of 93% of the max. speed at VO2maxGrade – 18%

Maximum

Lactate concentration

below AT above AT

28 healthy male• 35±6.7 yrs• 178±5.9 cm high• 76±7 kg weigh

Methods

Method Equipment Assessment

DC Potential of the Brain

Omegawave Pro-V.4, Finland

At rest Before each session, 15 min

after, and during the next 2 days

Lactate concentration

Biosen S-line Lab, EKF, Germany

Alactic (after every 10th session)

Lactic (after each sessions)

TreadmillH/P Cosmos Ergometer, Sportgerate, Germany

• Alactic training• Grade and Speed Control

Heart Rate Suunto T6, Finland • During both sessions

Results

Facts:• Both training loads changed the DC in recreational runners.• The direction of changes depends on the initial DC level

before training.• Archived new level of DC remained for the next two days.

REDUCED LEVEL

 

OPTIMAL LEVEL

Before After Day 1 Day 2

-5

0

5

10

15

20

D-C Potential of the Brain in the Groupe with Initially "Optimal Level of Activation" (n=8)

Alactic Training Lactic Training

p<0.05

p<0.05

REDUCED LEVEL

 

OPTIMAL LEVEL

Before After Day 1 Day 2

-5

0

5

10

15

20

D-C Potential of the Brain in the Groupe with Initially "Reduced Level of Activation" (n=20)

Alactic Training Lactic Training

p<0.05

We view the Super Slow Regulatory System of the Brain (SSRS) as a Functional organ responsible for the control of the athlete readiness (current functional state).

In our opinion the SSRS is not just an anatomical organ!

SSRS provides integrative and controlling function in relation to other slow regulatory systems.

Discussion

Structural Scheme for Coherent Module (KMi)of Brain’s Activating System (Shabanov et al, 2005)

Organism as a whole

Readiness Level of activation (LA)Functional StateAdaptabilityCapacity to learn

Brain Centers:frontaltemporalparietal

Basic for integration

Variability LA

Reciprocal balance LA

Brain Structures

Variability LA

Reciprocal balance LA

Neuron Membrane Potential is a base for Motor Potential

Variability LA

Levels of Integration of Super Slow Information-Controlling Systems in the Regulatory Mechanisms (adapted from Ilyukhina, 2011)

Practical Application

The DC Potential may be used to perform quick and dynamic comprehensive assessment of the recreational athletes' functional readiness for a training session.

A Model of Regulatory System Affecting a Positive Outcome (Fomin R., Nasedkin V., 2013)

Initial state Transitional state

New positive state

Collection

Analysis

Comparison

Correction

Stressor Regulatory System Training EffectBASELINE(before training)

OUTCOME(adequateresult)

A Model of Regulatory System Affecting With / Without a Negative Outcome (Fomin R., Nasedkin

V., 2013)

Analysis

Comparison

Correction

Collection

Stressor Regulatory System Training Effect

OUTCOME(inadequate result)

Initial state

Transitional state

New stateOUTCOME (return to initial state)

BASELINE(before training)

Thank you!