Linear relationship between the perception of effort and the duration of constant load exercise that remains.

The following is the abstract of the article discussed in the subsequent letter: The hypothesis that fatigue during prolonged exercise arises from insufficient intramuscular glycogen, which limits tricarboxylic acid cycle (TCA) activity due to reduced TCA cycle intermediates (TCAI), was tested in

[1]  Estelle V. Lambert,et al.  The Conscious Perception of the Sensation of Fatigue , 2003, Sports medicine.

[2]  Andrew Garnham,et al.  Glycogen availability does not affect the TCA cycle or TAN pools during prolonged, fatiguing exercise. , 2003, Journal of applied physiology.

[3]  J Dancey,et al.  Skeletal muscle energy metabolism during prolonged, fatiguing exercise. , 1999, Journal of applied physiology.

[4]  T. Noakes Training and Bioenergetic Characteristics in Elite Male and Female Kenyan Runners , 2003 .

[5]  G. Davis,et al.  Impaired calcium pump function does not slow relaxation in human skeletal muscle after prolonged exercise. , 1997, Journal of applied physiology.

[6]  K. Campbell,et al.  The Importance of ATPase Microenvironment in Muscle Fatigue: A Hypothesis , 1995, International journal of sports medicine.

[7]  T D Noakes,et al.  Evidence that a central governor regulates exercise performance during acute hypoxia and hyperoxia. , 2001, The Journal of experimental biology.

[8]  G. Lehmann,et al.  Pervitin als leistungssteigerndes Mittel , 1939, Arbeitsphysiologie.

[9]  R. K. Conlee 1 Muscle Glycogen and Exercise Endurance: A Twenty‐Year Perspective , 1987, Exercise and sport sciences reviews.

[10]  J. Fridén,et al.  Topographical localization of muscle glycogen: an ultrahistochemical study in the human vastus lateralis. , 1989, Acta physiologica Scandinavica.

[11]  Pierre-Marie Lepretre,et al.  Training and bioenergetic characteristics in elite male and female Kenyan runners. , 2003, Medicine and science in sports and exercise.

[12]  M IKAI,et al.  Some factors modifying the expression of human strength. , 1961, Journal of applied physiology.

[13]  T D Noakes,et al.  Physiological models to understand exercise fatigue and the adaptations that predict or enhance athletic performance , 2000, Scandinavian journal of medicine & science in sports.

[14]  T D Noakes,et al.  Reduced neuromuscular activity and force generation during prolonged cycling. , 2001, American journal of physiology. Regulatory, integrative and comparative physiology.

[15]  G. Stephenson,et al.  Glycogen content and excitation‐contraction coupling in mechanically skinned muscle fibres of the cane toad , 1999, The Journal of physiology.

[16]  E. Chin,et al.  Effects of reduced muscle glycogen concentration on force, Ca2+ release and contractile protein function in intact mouse skeletal muscle. , 1997, The Journal of physiology.