Maximal anaerobic performance of the knee extensor muscles during growth

Saavedra, Carlos; Lagassé, Pierre P.; Bouchard, Claude; Simoneau, J. A.

doi:10.1249/00005768-199109000-00014

Cited by 36 publications

(27 citation statements)

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“…Muscle strength per cross-sectional area of the muscle continues to increase in the postpubescent period as well. The sharpest increment was found in 17 to 19-year-old adolescents of both sexes (Saavedra et al, 1991). In parallel, isometric strength normalised for body mass increases in boys from 10 to 11 years of age and later from the age of 13 onwards.…”

Section: Neuro-muscular Controlmentioning

confidence: 80%

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Critical Periods in the Development of Performance Capacity During Childhood and Adolescence

Viru¹,

Loko²,

Harro³

et al. 1999

European Journal of Physical Education

159

158

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Section: Neuro-muscular Controlmentioning

confidence: 80%

“…When anaerobic capacity was tested with the aid of repeated knee extensions over either 10s, 30s or 90s, the maximal work output increased mainly between the ages of 9 and 15 years in children of both sexes (Saavedra et al, 1991).…”

Section: Metabolic Capacitiesmentioning

confidence: 99%

Critical Periods in the Development of Performance Capacity During Childhood and Adolescence

Viru¹,

Loko²,

Harro³

et al. 1999

European Journal of Physical Education

159

158

View full text Add to dashboard Cite

“…However, the present results do not support this. Some researchers have reported the age-related changes in thigh lean tissue (Saavedra et al 1991) and muscle volume (Martin et al 2000) and their relations to those in muscle function during the developmental stage. To our knowledge, however, no information on the growth trend of muscle CSA at different levels of limbs is available from previous studies.…”

Section: Discussionmentioning

confidence: 99%

Growth trend of the quadriceps femoris muscle in junior Olympic weight lifters: an 18-month follow-up survey

et al. 2003

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Isometric torque and the cross-sectional area (CSA) of the quadriceps femoris muscle (QF) were measured twice at an interval of 18 months in seven junior Olympic weight lifters (aged 15.5-17.1 years at the start of the study) to investigate the growth trend of this muscle group in junior athletes specializing in strength and power events. The CSAs of the QF and its four constituent muscles were determined at 30% (proximal to the knee), 50%, and 70% of femur length (Fl) using a magnetic resonance imaging method. Only at 30%Fl were significant increases found in the CSAs of the QF and all constituent muscles, except for the rectus femoris. At this level, the CSA of the vastus medialis relative to the QF decreased significantly, suggesting a predominant hypertrophy in the vastus intermedius and vastus lateralis muscles. Isometric torque during knee extension increased significantly compared, to the CSA for the QF measured at the three levels. Thus, the present results indicate that, at least at high school age, the QF for junior Olympic weight lifters is characterized by a preferential hypertrophy at the level proximal to the knee joint, with an increase in knee extension torque relative to the CSA.

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“…Such age-related increases in power have been associated with increased concentrations of anaerobic substrates (Eriksson et al 1973), changes to the individual's hormonal status, and the capacity to use stored elastic energy (Saavedra et al 1991). Given that these changes would be expected to affect the extensor and flexor muscles alike, it appears that some other factor may be limiting the expected age-related increase in power during the flexion phase of the action.…”

Section: Age-related Effects In Strength and Powermentioning

confidence: 99%

Strength, power, and coactivation in children with developmental coordination disorder

Raynor

2001

Develop Med Child Neuro

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Strength, power, and coactivation levels were measured during knee extension and flexion tasks in 20 children (13 males, 7 females) with developmental coordination disorder (DCD) and 20 age‐matched control children (12 males, 8 females). Participants were classified according to results obtained on the McCarron Assessment of Neuromuscular Development, with each group including two age levels: 6 to 7 and 9 to 10 years. Tasks were performed on a Biodex dynamometer under isometric and isokinetic conditions with surface EMG recorded from the vastus lateralis and biceps femoris muscles. Significant effects of group and age were observed for the measures of peak torque (isometric and isokinetic) and power, with the decreased power in the group with DCD being more apparent at higher velocities. A lower flexor‐extensor percentage was recorded for the group with DCD but only under isokinetic conditions. From a neuromuscular perspective, the group with DCD had increased levels of coactivation (RMS agonist: RMS antagonist) during the isometric flexion and isokinetic extension actions. Possible causes of the strength and power deficits observed in children with DCD are discussed.

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Maximal anaerobic performance of the knee extensor muscles during growth

Cited by 36 publications

References 0 publications

Critical Periods in the Development of Performance Capacity During Childhood and Adolescence

Critical Periods in the Development of Performance Capacity During Childhood and Adolescence

Growth trend of the quadriceps femoris muscle in junior Olympic weight lifters: an 18-month follow-up survey

Strength, power, and coactivation in children with developmental coordination disorder

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