Neuromuscular fatigue and recovery dynamics following prolonged continuous run at anaerobic threshold

Objective: The aim of this study was to determine the influence of intensive aerobic running on some muscle contractile characteristics and the dynamics of their recovery during a 2 hour period afterwards. Methods: Seven well trained runners performed a 6 km run at anaerobic threshold (VOBLA). Knee...

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Bibliographic Details
Published in:British journal of sports medicine 2006-03, Vol.40 (3), p.219-222
Main Authors: Škof, B, Strojnik, V
Format: Article
Language:English
Subjects:
activation level
Adult
Anaerobic Threshold - physiology
continuous running
contraction time
Electric Stimulation - methods
electrical stimulation
Electrodes
electromechanical delay
EMD
Exercise
Fatigue
half relaxation time
Humans
Isometric Contraction - physiology
Lactic Acid - blood
LFF
low frequency fatigue
maximum voluntary contraction (measured here as maximum isometric knee extension)
maximum voluntary contraction torque (measured here as maximum isometric knee extension torque)
Metabolism
Metabolites
Muscle Fatigue - physiology
Muscle, Skeletal - innervation
Muscle, Skeletal - physiology
Muscular system
MVC
Nervous System Physiological Phenomena
Original
Recovery of Function - physiology
rectus femoris
RT
Running
Running - physiology
Skin Temperature - physiology
Sports medicine
SSC
stretch shortening cycle
TF100
TF20
TMVC
Torque
torque at ES with 20 Hz
torque at stimulation with 100 Hz
TTW
twitch torque
vastus lateralis
vastus medialis
Workloads
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Summary:Objective: The aim of this study was to determine the influence of intensive aerobic running on some muscle contractile characteristics and the dynamics of their recovery during a 2 hour period afterwards. Methods: Seven well trained runners performed a 6 km run at anaerobic threshold (VOBLA). Knee torque during single twitch, low and high frequency electrical stimulation (ES), maximum voluntary knee extension, and muscle activation level test of the quadriceps femoris muscles were measured before and immediately after the run, and at several time points during a 120 minute interval that followed the run. Results: After exercise, the mean (SE) maximum twitch torque (TTW) and torque at ES with 20 Hz (low frequency ES; TF20) dropped by 14.1 (5.1)% (p
ISSN:0306-3674
1473-0480
DOI:10.1136/bjsm.2005.020966