Table 9 Female performance prediction equations for all isometric tests

Trunk flexor muscles

−355.82 − 0.96 × (age; years)^* − 1.69 × (weight; kg)^*** + 3.78 × (height; cm)^***

0.225

Back extensor muscles

−683.83 − 1.30 × (age; years)^* − 2.20 × (weight; kg)^*** + 6.42 × (height; cm)^***A.

0.258

Right quadratus lumborum muscles

−40.55 − 1.09 × (age; years)^*** − 0.92 × (weight; kg)^*** + 1.34 × (height; cm)^***

0.331

Left quadratus lumborum muscles

−29.35 − 1.06 × (age; years)^*** − 0.88 × (weight; kg)^*** + 1.25 × (height; cm)^***

0.353

Quadriceps muscles

−257.23 − 1.74 × (age; years)^*** − 1.47 × (weight; kg)^*** + 3.68 × (height; cm)^***

0.196

Hamstrings muscles

−57.63 − 0.64 × (age; years)^*** − 0.45 × (weight; kg)^** + 1.06 × (height; cm)^**

0.217

Back muscles

−81.78 − 0.56 × (age; years)^** − 0.74 × (weight; kg)^*** + 1.39 × (height; cm)^***

0.201

Chest muscles

−282.91 − 1.92 × (age; years)^*** − 1.88 × (weight; kg)^*** + 4.27 × (height; cm)^***

0.164