Table 3.

Duration and difference of the welding trials of each subject and in total—Position PF

Subject	Duration with Exo	Duration without Exo	Difference	Notes
0301	00:23:09	00:18:27	−00:04:42
0302	00:16:55	00:12:09	−00:04:46
0303	00:17:40	00:15:51	−00:01:49
0304	00:17:54	00:20:08	+00:02:14	A
0305	00:16:30	00:14:32	−00:01:58
0306	00:22:17	00:22:06	−00:00:11	B
0307	00:16:07	00:15:52	−00:00:15
0308	00:23:33	00:21:01	−00:02:32
0309	00:23:07	00:17:31	−00:05:36
0311	00:18:28	00:16:17	−00:02:11
0312	00:20:01	00:19:09	−00:00:52
0313	00:22:33	00:15:01	−00:07:32	C
0314	00:20:16	00:20:05	−00:00:11
0315	00:18:36	00:17:54	−00:00:42
0316	00:21:53	00:21:28	−00:00:25
Mean	00:19:56	00:17:50	−00:02:06
Mean without 0304, 0306, 0313	00:19:41	00:17:31	−00:02:10

Note. A, During the trial without exoskeletons in PF Position subject 0304 exhibited such high levels of local fatigue within the shoulder muscles that two short breaks of approximately 2 min each were required. B, During the trial without exoskeletons in PF Position subject 0306 exhibited such high levels of local fatigue within the shoulder muscles that a short break of approximately 2 min was required. C, During the trial without exoskeletons in PF Position subject 0313 complained of extremely uncomfortable shoulder and neck muscle fatigue, which is why he significantly increased his speed. This in turn is reflected in a drastic drop in the quality scale (see Table 1).