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Table 4 Regression constants for each muscle for young and old group

From: Muscles adaptation to aging and training: architectural changes – a randomised trial

Muscles

a

b

c

d

R2

Young Group

 VL

− 2.6917

0.2544

2.4614

/

0.9661

 VI

−1.5859

−1.4222

2.9428

/

0.9594

 VM

6.1739

−12.432

6.3191

/

0.951

 RF

−4.5326

3.0291

1.4916

/

0.9757

 MG

3.1543

−5.3238

−1.563

3.6899

0.9457

 LG

13.251

−25.583

11.267

1.0653

0.9661

 Sol

9.2596

−14.119

1.4893

3.4211

0.9466

Old group

a

b

c

d

R2

 VL

−2.4881

−0.0495

2.5442

/

0.9634

 VI

−1.4025

−1.7304

3.0576

/

0.9375

 VM

6.3957

−12.697

6.3731

/

0.9451

 RF

−3.9678

2.2447

1.6946

/

0.9577

 MG

7.9128

−16.14

6.3253

1.8729

0.9727

 LG

10.614

−20.573

8.3903

1.5649

0.9584

 Sol

11.127

−18.016

4.0566

2.8921

0.9465

  1. Constants a,b,c refers to for 3rd polynomial equation:
  2. ax3 + bx2 + cx
  3. Constants a,b,c,d refers to for 4th polynomial equation:
  4. ax4 + bx3 + cx2 + dx