Central and peripheral fatigue following non-exhaustive and exhaustive exercise of disparate metabolic demands

2015 ◽  
Vol 26 (11) ◽  
pp. 1287-1300 ◽  
Author(s):  
T. J. O'Leary ◽  
M. G. Morris ◽  
J. Collett ◽  
K. Howells
Keyword(s):  
Exhaustive Exercise ◽  
Peripheral Fatigue

ADRENOCORTICAL RESPONSE TO NON-EXHAUSTIVE MUSCULAR EXERCISE

1972 ◽  
Vol 70 (1) ◽  
pp. 73-80 ◽  
Author(s):  
L. W. Raymond ◽  
J. Sode ◽  
J. R. Tucci
Keyword(s):  
Treadmill Exercise ◽  
Serum Cortisol ◽  
Treadmill Walking ◽  
Exhaustive Exercise ◽  
Muscular Exercise ◽  
Adrenocortical Response ◽  
Exercise Tachycardia ◽  
Before And After

ABSTRACT Treadmill walking produced a prompt reduction in serum cortisol in 10 of 12 healthy military men. In contrast, two subjects, with pre-exercise tachycardia and apprehension, showed an increase in serum cortisol with treadmill exercise. In each group, the changes produced by exercise were still evident 30 and 60 minutes after the 30-minute treadmill walk. Urine collected before and after exercise contained similar amounts of 11-hydroxy- and 17-hydroxycorticosteroid material. These results may be explained by an increase in cortisol utilization during exercise and/or by a change in its distribution. The data indicate that in the absence of psychic factors, non-exhaustive exercise is not associated with pituitary adrenocortical activation.

Electrically-induced quadriceps fatigue in the contralateral leg impairs ipsilateral knee extensors performance

2021 ◽  
Author(s):  
Fabio Giuseppe Laginestra ◽  
Markus Amann ◽  
Emine Kirmizi ◽  
Gaia Giuriato ◽  
Chiara Barbi ◽  
...  
Keyword(s):  
Muscle Activation ◽  
Central Fatigue ◽  
Endurance Performance ◽  
Voluntary Exercise ◽  
Peripheral Fatigue ◽  
Knee Extensors ◽  
Motor Drive ◽  
Time To Exhaustion ◽  
Crossover Effect ◽  
The Impact

Muscle fatigue induced by voluntary exercise, which requires central motor drive, causes central fatigue that impairs endurance performance of a different, non-fatigued muscle. This study investigated the impact of quadriceps fatigue induced by electrically-induced (no central motor drive) contractions on single-leg knee-extension (KE) performance of the subsequently exercising ipsilateral quadriceps. On two separate occasions, eight males completed constant-load (85% of maximal power-output) KE exercise to exhaustion. In a counterbalanced manner, subjects performed the KE exercise with no pre-existing quadriceps fatigue in the contralateral leg on one day (No-PreF), while on the other day, the same KE exercise was repeated following electrically-induced quadriceps fatigue in the contralateral leg (PreF). Quadriceps fatigue was assessed by evaluating pre- to post-exercise changes in potentiated twitch force (ΔQtw,pot; peripheral-fatigue), and voluntary muscle activation (ΔVA; central-fatigue). As reflected by the 57±11% reduction in electrically-evoked pulse force, the electrically-induced fatigue protocol caused significant knee-extensors fatigue. KE endurance time to exhaustion was shorter during PreF compared to No-PreF (4.6±1.2 vs 7.7±2.4 min; p<0.01). While ΔQtw,pot was significantly larger in No-PreF compared to PreF (-60% vs -52%, p<0.05), ΔVA was greater in PreF (-14% vs -10%, p<0.05). Taken together, electrically-induced quadriceps fatigue in the contralateral leg limits KE endurance performance and the development of peripheral fatigue in the ipsilateral leg. These findings support the hypothesis that the crossover-effect of central fatigue is mainly mediated by group III/IV muscle afferent feedback and suggest that impairments associated with central motor drive may only play a minor role in this phenomenon.

Alterations in intracellular calcium signaling of lymphocytes after exhaustive exercise

2001 ◽  
pp. 242-248 ◽  
Author(s):  
FRANK CH. MOOREN ◽  
ANJA LECHTERMANN ◽  
ALBERT FROMME ◽  
LOTHAR THORWESTEN ◽  
KLAUS V??LKER
Keyword(s):  
Calcium Signaling ◽  
Intracellular Calcium ◽  
Exhaustive Exercise ◽  
Intracellular Calcium Signaling

Effects of endurance training and acute exhaustive exercise on antioxidant defense mechanisms in rat heart

2006 ◽  
Vol 143 (2) ◽  
pp. 239-245 ◽  
Author(s):  
Mustafa Gul ◽  
Berna Demircan ◽  
Seyithan Taysi ◽  
Nuray Oztasan ◽  
Kenan Gumustekin ◽  
...  
Keyword(s):  
Endurance Training ◽  
Rat Heart ◽  
Defense Mechanisms ◽  
Antioxidant Defense ◽  
Exhaustive Exercise

Biochemical Changes and Endocrine Responses in Cystic Fibrosis in Relation to Incremental Maximal Exhaustive Exercise

1988 ◽  
Vol 09 (S 1) ◽  
pp. S41-S44
Author(s):  
J. Stanghelle ◽  
S. Mæhlum ◽  
D. Skyberg ◽  
S. Landaas ◽  
H. Oftebro ◽  
...  
Keyword(s):  
Cystic Fibrosis ◽  
Biochemical Changes ◽  
Exhaustive Exercise

Omega-3 enriched chocolate milk: A functional drink to improve health during exhaustive exercise

2015 ◽  
Vol 14 ◽  
pp. 676-683 ◽  
Author(s):  
Priscila Neder Morato ◽  
Juliana Burger Rodrigues ◽  
Carolina Soares Moura ◽  
Fernanda Guimarães Drummond e Silva ◽  
Erick Almeida Esmerino ◽  
...  
Keyword(s):  
Exhaustive Exercise ◽  
Chocolate Milk ◽  
Omega 3 ◽  
Functional Drink ◽  
Improve Health
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