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Table 3 Mean (± SEM) delta (Δ) Intervertebral disc (IVD) (L2–S1) height after performance of trunk muscle exercise when upright in 1 g (ΔPOST—PRE UPRIGHT), and during exposure to 1 g (at the CoM) via short-arm centrifugation (ΔPOST—PRE SAHC)

From: Effect of trunk exercise upon lumbar IVD height and vertebral compliance when performed supine with 1 g at the CoM compared to upright in 1 g

IVD level (cm)

Δ (POST − PRE) UPRIGHT

Δ(POST − PRE) SAHC

Hedge’s g

Paired t-test

L2–L3

 − 0.065 ± 0.027

 − 0.005 ± 0.027

0.73

p = 0.300

L3–L4

 − 0.006 ± 0.024

 − 0.007 ± 0.045

0.01

p = 0.404

L4–L5

0.002 ± 0.026

 − 0.037 ± 0.031

0.37

p = 0.984

L5–S1

 − 0.037 ± 0.028

 − 0.157 ± 0.093

0.58

p = 0.115

  1. Paired t-tests with Hedge’s g effect size calculations were used to compare conditions