title: Fatigue resistance during high-intensity intermittent exercise from childhood to adulthood in males and females.
abstract: This study examined the maturation pattern of fatigue resistance (FR) from childhood to adulthood in females and males during high-intensity intermittent exercise and compared FR between females and males in childhood and adolescence. Thirty males (boys 11.3 +/- 0.5 years, teen-males 14.7 +/- 0.3 years, men 24.0 +/- 2.1 years) and 30 females (girls 10.9 +/- 0.6 years, teen-females 14.4 +/- 0.7 years, women 25.2 +/- 1.4) participated in this study. They performed high-intensity intermittent exercise (4 x 18 maximal knee flexions and extensions with 1-min rest) on an isokinetic dynamometer at 120 degrees s(-1). Peak torque of flexors (PTFL) and extensors (PTEX), and total work (TW) were measured. FR was calculated as % of PTEX, PTFL, and TW in 4th versus 1st set. FR was greater (P < 0.05) in boys versus teen-males and men, and in teen-males versus men. In females, FR was greater (P < 0.05) in girls versus teen-females and women, but not different between teen-females and women. FR was not different in boys versus girls and in teen-males versus teen-females. FR for PTFL, PTEX, and TW correlated negatively (P < 0.001) with the respective peak values (r = -0.68 to -0.84), and FR for TW with peak lactate (r = -0.58 to -0.69). In addition, age correlated (P < 0.01) with FR for males (r = -0.75) and females (r = -0.55). In conclusion, FR during high-intensity intermittent exercise undergoes a gradual decline from childhood to adulthood in males, while in females the adult profile establishes at mid-puberty (14-15 years). The maturation profile of FR in males and females during development appears to reflect the maturation profiles of peak torque, short-term muscle power, and lactate concentration after exercise.
authors.affiliation: Department of Physical Education & Sport Sciences at Serres, Aristotle University of Thessaloniki, Ag. Ioannis, 62110 Serres, Greece.
authors.forename: Konstantina
authors.initials: K
authors.lastname: Dipla
authors.forename: Theano
authors.initials: T
authors.lastname: Tsirini
authors.forename: Andreas
authors.initials: A
authors.lastname: Zafeiridis
authors.forename: Vasiliki
authors.initials: V
authors.lastname: Manou
authors.forename: Athanassios
authors.initials: A
authors.lastname: Dalamitros
authors.forename: Eleftherios
authors.initials: E
authors.lastname: Kellis
authors.forename: Spyros
authors.initials: S
authors.lastname: Kellis
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D015444:Exercise / Q000502:physiology*; D017079:Exercise Tolerance / Q000502:physiology; D005221:Fatigue / Q000097:blood / Q000503:physiopathology; D005260:Female; D006801:Humans; D019344:Lactic Acid / Q000097:blood; D008297:Male; D010507:Periodicity; D010807:Physical Endurance / Q000502:physiology*; D012737:Sex Factors; D055815:Young Adult
chemical_list: D019344:Lactic Acid