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Table 2 Intrapair Pearson’s correlation coefficients (r) in monozygotic (MZ) and dizygotic (DZ) twins

From: Heritability and genetic etiology of habitual physical activity: a twin study with objective measures

Zygosity

MZ

DZ

Trait

r

p

r

p

HPA

0.64

0.0003

0.36

0.08

Low

0.62

0.0004

0.12

0.58

Moderate

0.60

0.0008

0.10

0.65

High

0.63

0.0003

0.06

0.79

  1. HPA Habitual physical activity; Low, Moderate, High the time spent on low-, moderate- and high-intensity physical activity, respectively (min/day)