Table 2: Weight ratio of gastrocnemius, tibialis anterior muscles, and heart to body in control and flight mice.

GroupAnimal weight, gMyocardium weight, mg Weight of m. gastrocnemius med., mg Weight of m. tibialis anterior, mgRatio of myocardium weight to animal body weight, mg/g Ratio of weight of m. gastrocnemius to animal body weight, mg/g Ratio of weight of m. tibialis to animal body weight, mg/g

Control,
= 5
27.8 ± 1.0167.4 ± 23.885.5 ± 5.740.6 ± 5.16.03 ± 0.843.08 ± 0.241.46 ± 0.19
Flight, = 5 29.3 ± 2.2179.1 ± 7.576.8 ± 7.835.7 ± 5.16.13 ± 0.282.62 ± 0.251.22 ± 0.15

. Psoas muscle was not weighed in these experiments because of methodical difficulties of isolation of the whole muscle.