Effects of prolonged running performed at the intensity corresponding to the onset of blood lactate accumulation, on maximum isokinetic strength in active non-athletic individuals
Objective: The objective of this study was to analyze the effects of prolonged continuous running performed at the intensity corresponding to the onset of blood lactate accumulation (OBLA), on the peak torque of the knee extensors, analyzed in relation to different types of contraction and movement...
Gespeichert in:
Veröffentlicht in: | Revista brasileira de fisioterapia (São Carlos (São Paulo, Brazil)) Brazil)), 2007-06, Vol.11 (3), p.221-226 |
---|---|
Hauptverfasser: | , , , |
Format: | Artikel |
Sprache: | eng ; por |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | Objective: The objective of this study was to analyze the effects of prolonged continuous running performed at the intensity corresponding to the onset of blood lactate accumulation (OBLA), on the peak torque of the knee extensors, analyzed in relation to different types of contraction and movement velocities in active individuals. Method: Eight men (23.4 plus or minus 2.1 years; 75.8 plus or minus 8.7 kg; 171.1 plus or minus 4.5 cm) participated in this study. First, the subjects performed an incremental test until volitional exhaustion to determine the velocity corresponding to OBLA. Then, the subjects returned to the laboratory on two occasions, separated by at least seven days, to perform five maximal isokinetic contractions of the knee extensors at two angular velocities (60 and 180 degree .s super(-1)) under eccentric and concentric conditions. Eccentric peak torque (EPT) and Concentric peak torque (CPT) were measured at each velocity. One session was performed after a standardized warm-up period (5 min at 50% VO sub(2)max). The other session was performed after continuous running at OBLA until volitional exhaustion. These sessions were conducted in random order. Results: There was a significant reduction in CPT only at 60 degree .s super(-1) (259.0 plus or minus 46.4 and 244.0 plus or minus 41.4 N.m). However, the reduction in EPT was significant at 60 degree .s super(-1) (337.3 plus or minus 43.2 and 321.7 plus or minus 60.0 N.m) and 180 degree .ss super(-1) (346.1 plus or minus 38.0 and 319.7 plus or minus 43.6 N.m). The relative strength losses after the running exercise were significant different between contraction types only at 180 degree .s super(-1). Conclusion: We can conclude that, in active individuals, the reduction in peak torque after prolonged continuous running at OBLA may be dependent on the type of contraction and angular velocity. |
---|---|
ISSN: | 1413-3555 1809-9246 1413-3555 1809-9246 |
DOI: | 10.1590/S1413-35552007000300008 |