Table 1.

Mass development of both apnoea groups was inhibited

	Average pre‐apnoea weight (g)	Average post‐apnoea weight (g)	Heart weight/body weight (g/g)	Heart weight/tibia length (g/mm)
Control (n = 10)	285.7 (±11.7)	302.4 (±12.0)	0.0035 (±0.0002)	0.028 (±0.0015)
13 sec. apnoea (n = 7)	258.0 (±11.6)	261.0 (±10.2)a	0.0031 (±0.0002)	0.021 (±0.0008)a
23 sec. apnoea (n = 9)	267.6 (±11.1)	232.1 (±8.0)a	0.0042 (±0.0001)a	0.025 (±0.0009)

Thirteen second apnoeas resulted in decreased heart mass relative to tibia length, while relative heart mass was similar to controls. Twenty three seconds apnoeas caused decreased post‐apnoea body mass and increased relative heart mass, although heart weight to tibia length ratio remained unchanged.

^a P < 0.05 versus control.