TABLE 2.
Study characteristics—Time to task failure.
| Study | Participant’s age (n) | Fatiguing exercise (criteria for exercise ending) | TTF (in s) | ||||||
| Ch | Ado | Adu | Muscle group | Ch | Ado | Adu | Statistical significance | ||
| ISOMETRIC EXERCISE | |||||||||
| Armatas et al. (2010) | 10 (13) | — | 26 (13) | 5 s MVC/5 s rest (↓ of 50% MVC) | KE | 563 | — | 348 | S |
| Bontemps et al. (2019) | 10 (18) | — | 22 (19) | 5 s MVC/5 s rest (↓ of 40% MVC) | KE | 404 | — | 159 | S |
| Hatzikotoulas et al. (2014) | 11 (10) | — | 26 (11) | Sustained MVC (↓ of 50% MVC) | PF | 127 | — | 94 | S |
| Patikas et al. (2013) | 10 (14) | — | 24 (14) | Sustained 20% MVC (5 s < 95% target force) | PF | 771 | — | 786 | NS |
| Sustained 60% MVC (5 s < 95% target force) | 195 | — | 201 | NS | |||||
| Piponnier et al. (2020) | 10 (19) | — | 22 (23) | 5 s MVC/5 s rest optimal length (↓ of 40% MVC) | PF | 156 | — | 135 | NS |
| 5 s MVC/5 s rest long length (↓ of 40% MVC) | 120 | — | 130 | NS | |||||
| 5 s MVC/5 s rest short length (↓ of 40% MVC) | 170 | — | 160 | NS | |||||
| Piponnier et al. (2019b) | 10 (22) | — | 21 (22) | 5 s MVC/5 s rest optimal length (↓ of 40% MVC) | KE | 397 | — | 148 | S |
| 5 s MVC/5 s rest long length (↓ of 40% MVC) | 295 | — | 158 | S | |||||
| 5 s MVC/5 s rest short length (↓ of 40% MVC) | 337 | — | 409 | NS | |||||
| Piponnier et al. (2019a) | 10 (9) | 14 (8) | 24 (11) | 5 s MVC/5 s rest (↓ of 40% MVC) | KE | 529 | 426 | 266 | S (Ch & Ado vs. Adu) |
| Ratel et al. (2015) | 10 (11) | — | 24 (12) | 5 s MVC/5 s rest (↓ of 40% MVC) | KE | 495 | — | 340 | S |
| Tanina et al. (2017) | 9 (14) | — | 25 (14) | Sorensen back test (> 2 cm reduction in height for 2 s) | TE | 95 | — | 98 | NS |
| Woods et al. (2019) | 10 (18) | — | 24 (21) | Intermittent 5 s submaximal contractions (volitional exhaustion) | KE | 688 | — | 632 | NS |
| Woods et al. (2020) | 10 (17) | — | 24 (17) | Intermittent 5 s submaximal contractions (volitional exhaustion) | KE | 608 | — | 560 | NS |
| DYNAMIC EXERCISE | |||||||||
| Bar Yoseph et al. (2019) | 11 (18) | 17 (18) | 29 (8) | Incremental cycling exercise (cadence < 60 rpm) | LL | 670 | 692 | 690 | NS |
| Incremental running exercise (volitional exhaustion) | 700 | 951 | 1,013 | S (Ado & Adu vs. Ch) | |||||
| Berthoin et al. (2003) | 11 (9) | — | 22 (8) | Cycling at 120% PMA (volitional exhaustion) | LL | 53 | — | 122 | S |
| Leclair et al. (2011) | 10 (15) | — | 24 (15) | Constant load cycling exercise P50 (cadence < 70 rpm) | LL | 702 | — | 754 | NS |
| Constant load cycling exercise P75 (cadence < 70 rpm) | 307 | — | 371 | ||||||
| Constant load cycling exercise P100 (cadence < 70 rpm) | 144 | — | 221 | S | |||||
| Constant load cycling exercise P110 (cadence < 70 rpm) | 96 | — | 147 | S | |||||
| Murphy et al. (2014) | 10 (10) | — | 26 (10) | 3 × max CON MVC Low RM (volitional exhaustion) | KE | 274 | — | 253 | S |
| 3 × max CON MVC High RM (volitional exhaustion) | 213 | — | 193 | ||||||
| Pullinen et al. (2011) | — | 14 (8) | 31 (8) | 3 × max contractions at 40% RM (volitional exhaustion) | KE | — | 48 | 48 | NS |
| Pullinen et al. (2002) | — | 14 (6) | 27 (6) | 1 × max contractions at 40% RM (volitional exhaustion) | KE | — | 46 | 42 | NS |
| Tibana et al. (2012) | — | 15 (15) | 22 (15) | 3 × max chest press w/30 s rest (volitional exhaustion) | UL | — | 96 | 88 | S |
| 3 × max chest press w/60 s rest (volitional exhaustion) | — | 163 | 156 | S | |||||
| 3 × max chest press w/120 s rest (volitional exhaustion) | — | 292 | 282 | S | |||||
Data presented in bold black were directly given in time units (seconds) in the article. Data presented in bold blue were calculated by the authors from the number of contractions performed during the fatiguing exercise. Ado, adolescents; Adu, adult; Ch, children; CON, concentric; KE, knee extensors; KF, knee flexors; LL, lower limbs; MVC, maximal voluntary contraction; n, number of participants; NS, nonsignificant; P50 and P75, intensities corresponded to 50 and 75% of the difference between maximal aerobic power and the power associated with the ventilatory threshold; P100 and P110, intensities corresponded to 100 and 110% of maximal aerobic power; PF, plantar flexors; RM, maximum repetition; S, statistically significant (i.e., p < 0.05); TE, trunk extensors; TTF, time to task failure; UL, upper limbs.