Table 5 Mixed regression models predicting raw prediction error (repetitions completed—centered)

Variable

Estimate [95% CI],

p value

Estimate [95% CI],

p value

Intercept

 − 4.26 [− 5.54, − 2.99]

 < 0.001

 − 4.40 [− 5.67, − 3.12]

 < 0.001

66% versus 33% failure proximity

3.02 [2.71, 3.32]

 < 0.001

2.88 [2.50, 3.26]

 < 0.001

90% versus 33% failure proximity

4.81 [4.41, 5.21]

 < 0.001

4.47 [3.97, 4.98]

 < 0.001

Set 2 versus set 1

0.64 [0.44, 0.84]

 < 0.001

0.59 [0.34, 0.84]

 < 0.001

Squat versus biceps-curls

 − 3.48 [− 3.85, − 3.11]

 < 0.001

 − 2.75 [− 3.19, − 2.32]

 < 0.001

80% versus 70%1RM

1.34 [− 0.15, 2.83]

0.074

1.56 [0.09, 3.03]

0.038

Repetitions completed (centered)

0.08 [0.04, 0.12]

 < 0.001

0.06 [0.01, 0.11]

0.0183

Years of training experience (centered)

–

0.002 [− 0.025, 0.029]

0.890

Male versus female trainee

0.59 [− 0.88, 2.07]

0.398

0.58 [− 0.90, 2.07]

0.410

Male versus female coach

–

0.01 [− 0.36, 0.40]

0.927

Male versus female coach X male versus female trainee

–

0.02 [− 0.53, 0.58]

0.928

Squat versus biceps-curls X 80% versus 70%1RM

1.84 [1.43, 2.26]

 < 0.001

1.29 [0.79, 1.80]

 < 0.001