6533b835fe1ef96bd129f692

RESEARCH PRODUCT

Muscle strength and muscle characteristics in monozygous and dizygous twins.

J. KarlssonJukka T. ViitasaloPaavo V. Komi

subject

AdultMalemedicine.medical_specialtyAdolescentPhysiologyTwinsElectromyographyBiologyPregnancyInternal medicinemedicineTwins DizygoticHumansChildYoung maleMuscle biopsymedicine.diagnostic_testElectromyographyMusclesQuadriceps muscleAnatomyTwins MonozygoticMuscular powerVariance ratioEndocrinologyMuscle strengthFemalemedicine.symptomEnergy MetabolismMuscle contractionMuscle Contraction

description

Muscle strength and electrical activity were investigated on 31 pairs of young male and female monozygous (MZ) and dizygous (DZ) twins. The measurements included leg forces, force-time, running velocity, muscular power, maximal integrated electromyographic activity (IEMG) and chronaximetry of the quadriceps muscle group. In each parameter the intrapair variance was computed and the differences were tested between the MZ and DZ twins. The variance ratio (MZ vs. DZ) was statistically significant only for muscular power confirming an earlier finding which has demonstrated a genetic component for the variable. In addition to the various performance variables several key enzymes involved in ATP turnover during muscle contraction and in glucose residue metabolism were analyzed from the muscle biopsy samples (m. vastus lateralis). A genetic component could not be observed in any of their activities or their relationships to performance variables.

yearjournalcountryeditionlanguage
1979-07-01Acta physiologica Scandinavica
10.1111/j.1748-1716.1979.tb06405.xhttps://pubmed.ncbi.nlm.nih.gov/574351